Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 54 Issue 19

Early View (Online Version of Record published before inclusion in an issue)

Impact Factor: 3.113

ISI Journal Citation Reports © Ranking: 2014: 18/82 (Polymer Science)

Online ISSN: 1099-0518

Associated Title(s): Journal of Polymer Science Part B: Polymer Physics

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  1. 1 - 37
  1. Reviews

    1. Polymer-based drug delivery systems for cancer treatment

      Xing Guo, Lin Wang, Xiao Wei and Shaobing Zhou

      Version of Record online: 24 AUG 2016 | DOI: 10.1002/pola.28252

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      Nanoparticles (NPs) fabricated from amphiphilic block copolymers exhibit great potential in drug delivery application. By introducing stimuli responsiveness into polymers, their physiochemical properties can be changed according to the distinctions in surrounding environment. In this case, alterations in the polymer characteristics in turn lead to changes in the nanocarrier structure or chemistry, triggering the release of payload in a particular biological environment.

  2. Articles

    1. Synthesis, characterization, and structure–property investigation of conformationally rigid regioisomers of poly(p-phenylene ethynylene)s

      Choong Ping Sen and Suresh Valiyaveettil

      Version of Record online: 18 AUG 2016 | DOI: 10.1002/pola.28255

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      Poly(p-phenylene ethynylene)s with rigid and nonplanar conformations are synthesized and characterized. The effects of rigidity, regioregularity, and steric hindrance of biphenyl side chains on polymer properties are investigated.

  3. Rapid Communication

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      Self-suspended polyaniline containing self-dissolved lyotropic liquid crystal with electrical conductivity

      Jing Huang, Mengkui Wang, Shan Wang, Tao Wang, Qi Li, Lijie Dong and Chuanxi Xiong

      Version of Record online: 18 AUG 2016 | DOI: 10.1002/pola.28256

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      Self-Suspended PANI doped with 4-nonylphenol polyoxyethylene ether acetic acid (GAE) exhibits liquid-like rheological behavior in the absence of any solvent. The PANI-GAE also appears smectic C lyotropic liquid crystal under solvent-free condition. This self-suspended PANI containing liquid crystalline offers tremendous potential for antistatic coatings, anticorrosion coatings, liquid crystal display and spatial light modulator.

  4. Articles

    1. POSS end-linked peptide-functionalized poly(ɛ-caprolactone)s and their inclusion complexes with α-cyclodextrin

      Ujjal Haldar, Biswajit Saha, Venkanna Azmeera and Priyadarsi De

      Version of Record online: 16 AUG 2016 | DOI: 10.1002/pola.28254

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      Tripeptide-poly(caprolactone) (PCL) bio-hybrid conjugates with and without polyhedral oligomeric silsesquioxane (POSS) chain ends were prepared via ring opening polymerization (ROP) using POSS/OMe-Leu-Aib-Leu-NH2 (Leu: leucine; Aib: α-aminoisobutyric acid) sequence defined amine terminated peptide initiators. Supramolecular inclusion complexations of synthesized peptide-PCL conjugates with α-cyclodextrin (α-CyD) were studied to understand the effect of POSS/OMe-peptide moieties connected with the one edge of the PCL chains.

    2. Diazonium salts for surface-confined visible light radical photopolymerization

      Idriss Bakas, Gorkem Yilmaz, Zouhair Ait-Touchente, Aazdine Lamouri, Philippe Lang, Nicolas Battaglini, Benjamin Carbonnier, Mohamed M. Chehimi and Yusuf Yagci

      Version of Record online: 13 AUG 2016 | DOI: 10.1002/pola.28241

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      Gold and flexible ITO substrates were grafted with dimethylamino phenyl groups and served for the in situ radical photopolymerization of monomers in the visible light using camphorquinone as the free hydrogen abstractor. Ultrathin homo- and crosslinked PMMA and PHEMA are tightly anchored to the surface as they resist removal by the paint stripper methyl ethyl ketone. The new process combining diazonium salts and visible light-graft polymerization is very efficient and provides highly adherent continuous or patterned reactive and functional polymer coatings.

    3. Hydrogen-bonding characteristics and unique ring-opening polymerization behavior of Ortho-methylol functional benzoxazine

      Kan Zhang, Pablo Froimowicz, Lu Han and Hatsuo Ishida

      Version of Record online: 12 AUG 2016 | DOI: 10.1002/pola.28253

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      Monofunctional benzoxazine with ortho-methylol functionality has been synthesized and highly purified in this study. The 1H NMR analysis of hydrogen bonds in solution and the DSC results support the intramolecular hydrogen bonding ring activates the oxazine ring to open at lower temperature. Both experimental studies, hydrogen-bonding interactions and polymerization, further and strongly support the ortho-methylol mechanisms for the crosslinking reaction we proposed before.

  5. Rapid Communication

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      Spatial control of flocculation via light

      Zeyun Xiao, Chao Chen, Emma Ruth Lucille Brisson, Joe Collins, Wei Sung Ng and Luke A. Connal

      Version of Record online: 10 AUG 2016 | DOI: 10.1002/pola.28242

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      A highly efficient photoinitiated flocculation system formed through the trapping of a photogenerated thiobenzaldehyde with polyethylenimine was developed. This photoresponsive system provides spatial and temporal control over flocculation processes and has been applied to heavy metal flocculation.

  6. Articles

    1. Thermal radical initiator derivatives based on O-imino-isourea: Synthesis, polymerization, and characterization

      Beomjin Kim, Dong Geun Lee, Dong Yeon Kim, Hyeok Jin Kim, Nam Sik Kong, Jin Chul Kim, Seung Man Noh, Hyun Wook Jung and Young IL Park

      Version of Record online: 10 AUG 2016 | DOI: 10.1002/pola.28244

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      The new thermal radical initiators (TRIs) with linear and cyclic type groups based on derivatives of O-imino-isourea have been designed and synthesized. The radical polymerization property and efficiency of the synthesized TRI derivatives as a radical initiator in n-butyl acrylate was monitored. It is noteworthy that the TRI derivatives with linear type groups show similar curing temperatures, whereas those with cyclic type groups could effectively reduce the curing temperature.

    2. Highly cis-1,4 selective polymerization of isoprene promoted by α-diimine cobalt(II) chlorides

      Xinxin Wang, Linlin Fan, Chuanbing Huang, Tongling Liang, Cun-Yue Guo and Wen-Hua Sun

      Version of Record online: 10 AUG 2016 | DOI: 10.1002/pola.28247

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      1,2-Bis(arylimino)acenaphthylylcobalt chlorides (LCoCl2, C1C5), on activation with AlEtCl2, efficiently polymerize isoprene to give polyisoprenes (PIs) with high contents of cis-1,4 units (between 90% and 94%).

    3. Radical copolymerization of N-phenylmaleimide and diene monomers in competition with diels–alder reaction

      Akikazu Matsumoto and Daisuke Yamamoto

      Version of Record online: 10 AUG 2016 | DOI: 10.1002/pola.28248

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      Radical copolymerization of N-phenylmaleimide, with diene monomers including naturally occurring compounds, is efficiently undertaken by the suppression of a DielsAlder reaction and produces thermally stable copolymers with an onset temperature of decomposition over 330 °C and a glass transition temperature over 130 °C. The efficient copolymer formation in competition with the DielsAlder addition is investigated under various conditions of the temperature, solvents, and initiators used for the copolymerization.

  7. Rapid Communication

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      Ring-opening polymerization of ε-caprolactone catalyzed by ionic hydrogen bond activation with bis-pyridiniums

      Gwenaelle Gontard, Abderrahmane Amgoune and Didier Bourissou

      Version of Record online: 6 AUG 2016 | DOI: 10.1002/pola.28238

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      Pyridinium and bispyridinium salts are shown to be efficient ionic hydrogen bond catalysts for the controlled ring–opening polymerization of ε–caprolactone. The catalytic activity is significantly enhanced thanks to the participation of the two hydrogen bond donor sites in the monomer activation.

  8. Articles

    1. Synthesis and character of novel polycarbonate for constructing biodegradable multi-stimuli responsive delivery system

      Mengmeng Xie, Lin Yu, Zhao Li, Zhen Zheng and Xinling Wang

      Version of Record online: 6 AUG 2016 | DOI: 10.1002/pola.28243

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      A novel biodegradable triple-stimuli-sensitive graft polycarbonate which responds to the changes in temperature, reducing agent, and light is designed. It is constructed by thermo-responsive tetraethylene glycolyl poly(trimethylene carbonate) (P(MTC-4EG)) as backbone and light-sensitive poly(2-nitrobenzyl methacrylate) (PNBM) as side chain linked by an intervening disulfide bond. The polycarbonate can self-assemble in aqueous solution and its morphology can be altered by triple stimuli which endow the micelle with fine tuned drug delivery behavior under stimuli.

  9. Rapid Communication

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      Imidazobenzoxazin-5-ones as thermal latent curing agents for thermosetting epoxy resins

      Kenji Kudo, Masahiro Furutani and Koji Arimitsu

      Version of Record online: 6 AUG 2016 | DOI: 10.1002/pola.28245

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      We developed a novel thermal latent curing agent with good compatibility towards epoxy resins. We found that this latent curing agent is converted to the corresponding imidazole via a ring-opening reaction. Epoxy resin compositions consisting of the latent curing agent have superior curability at 150 °C and a long shelf life at room temperature.

  10. Articles

    1. Synthesis of linear and star-like poly(ε-caprolactone)-b-poly{γ-2-[2-(2-methoxy-ethoxy)ethoxy]ethoxy-ε-caprolactone} amphiphilic block copolymers using zinc undecylenate

      Katherine E. Washington, Ruvanthi N. Kularatne, Jia Du, Matthew J. Gillings, Jack C. Webb, Nicolette C. Doan, Michael C. Biewer and Mihaela C. Stefan

      Version of Record online: 6 AUG 2016 | DOI: 10.1002/pola.28246

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      Zinc undecylenate is used as a catalyst to form linear and star-like amphiphilic diblock copolymers through the ring-opening polymerization of ε-caprolactone and γ-2-[2-(2-methoxyethoxy)ethoxy]ethoxy-ε-caprolactone monomers. The resulting polymers are explored for their applicability as micellar drug delivery vehicles for the delivery of the chemotherapeutic drug doxorubicin. The resulting properties of these polymers are compared in terms of their potential for drug delivery including their molecular weight, thermodynamic stability, size, morphology, and drug loading capabilities.

    2. Long-subchain hyperbranched poly(aminoethyl acrylate): A potent antimicrobial polymer with low hemolytic toxicity

      Sheng-Qi Chen, Lulu Xu, Chen He, Peng-Yun Li, Xiao-Xia Lu, Jia-Min Li, Hui-Juan Li, Wei-Dong He and Lihua Yang

      Version of Record online: 4 AUG 2016 | DOI: 10.1002/pola.28236

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      Long-subchain hyperbranched poly(aminoethyl acrylate)s were feasibly prepared through alkynyl-azido click polymerization of its seesaw macromonomers while exhibited excellent antibacterial activity but low hemolytic toxicity.

    3. Influence of donor–acceptor conjugation between thiophene-phthalazinone structures containing Sp3 C[BOND]N bond on the frontier orbital levels and optic–electronic properties

      Jianhua Han, ShengLi Cheng, Cheng Liu, Jinyan Wang and Xigao Jian

      Version of Record online: 4 AUG 2016 | DOI: 10.1002/pola.28237

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      Three D–A conjugated fluoropolymers are synthesized by classical aromatic nucleophilic displacement C[BOND]N coupling polymerization combined with Sp3 C[BOND]N bond linked electron-deficient phthalazinone moiety.

    4. Exploring thiol-yne based monomers as low cytotoxic building blocks for radical photopolymerization

      Andreas Oesterreicher, Santhosh Ayalur-Karunakaran, Andreas Moser, Florian H. Mostegel, Matthias Edler, Petra Kaschnitz, Gerald Pinter, Gregor Trimmel, Sandra Schlögl and Thomas Griesser

      Version of Record online: 2 AUG 2016 | DOI: 10.1002/pola.28239

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      New monomers for thiol-yne based photopolymers were synthesized and characterized. It could be successfully shown that these building blocks provide significant lower cytotoxicity than the corresponding (meth)acrylates and offer comparably high reactivities. Network and mechanical properties of derived polymers were studied by dynamic mechanical thermal analysis (DMA) and low-field solid-state NMR. It turned out that monomers containing rigid backbones lead to moduli and glass transition temperatures, sufficiently high for the fabrication of medical devices.

    5. Highly symmetric single nickel catalysts bearing bulky bis(α-diimine) ligand: Synthesis, characterization, and electron-effects on copolymerization of norbornene with 1-alkene at elevated temperarure

      Xiaohui He, Yingjiao Deng, Zhilong Han, Yingping Yang and Defu Chen

      Version of Record online: 2 AUG 2016 | DOI: 10.1002/pola.28240

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      Three new three-dimensional geometry bulky bis(α-diimine) single Ni(II) catalysts, NiL2Br2 (Ni(L1)2Br2, Ni(L2)2Br2, and Ni(L3)2Br2, were synthesized, characterized, and applied to catalyze norbornene polymerization and copolymerization of norbornene with 1-alkene at elevated temperature. The thermal stability of catalysts, polymerization conditions and the relationship between activity and ligand electronic effects have been studied.

    6. D–π–A polysulfones for blue electroluminescence

      ZhongMin Geng, Go Sato, Kazuhiro Marumoto and Masashi Kijima

      Version of Record online: 28 JUL 2016 | DOI: 10.1002/pola.28233

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      A new series of D–π–A polysulfones for blue electroluminescence were designed and synthesized by controlling π-conjugation of fluorene based sequence with the sulfone unit. The results indicated that the polysulfones are an effective emitting polymers material with proper controlled π-conjugation for blue LEC application.

    7. A highly rigid diamine monomer derived from naturally occurring myo-inositol and its use for polyamide synthesis

      Atsushi Sudo and Shou Sugita

      Version of Record online: 25 JUL 2016 | DOI: 10.1002/pola.28231

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      A rigid diamine was synthesized from myo-inositol, a naturally occurring cyclic hexaol, and used as a monomer for synthesizing polyamides. The incorporation of the highly rigid 5-6-5 fused ring system into the main chains resulted in high glass-transition temperatures of the polyamides formed.

    8. Synthesis and UCST-type phase behaviors of OEGylated random copolypeptides in alcoholic solvents

      Mengxiang Zhu, Wenjun Liu, Jiang Xiao, Ying Ling and Haoyu Tang

      Version of Record online: 25 JUL 2016 | DOI: 10.1002/pola.28232

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      OEGylated random copolypeptides were prepared from the ring-opening polymerization of OEGylated γ-benzyl-L-glutamic acid based N-carboxyanhydride and γ-benzyl-L-glutamic acid based N-carboxyanhydride. They exhibited a reversible upper critical solution temperature (UCST)-type phase behavior in various alcoholic solvents. The UCST-type transition temperatures of the copolymers were highly dependent on OEG molar content, side-chain length, and polymer concentration.

    9. Polycondensation of diglycerol with H3PO4. Reversibly degradable gels giving multireactive, highly branched macromolecules

      Julia Pretula, Krzysztof Kaluzynski and Stanislaw Penczek

      Version of Record online: 22 JUL 2016 | DOI: 10.1002/pola.28219

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      The article describes the synthesis of highly branched poly(diglycerol phosphate)s. Polymers were synthesized by direct polycondensation of biobased materials, diglycerol and phosphoric acid, via hydrolyzable gels. The final acidic gels, still containing hydroxyl groups, have been solubilized by hydrolysis and have been used in polymerization of l-lactide. In this process, acidic groups were acting as catalysts and hydroxyl groups as initiators.

    10. Multidimensional mass spectrometry to characterize degradation products generated during MALDI of polystyrenes prepared by controlled radical polymerization techniques

      Christophe Chendo, Dao Le, Trang N. T. Phan, Didier Gigmes and Laurence Charles

      Version of Record online: 22 JUL 2016 | DOI: 10.1002/pola.28229

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      High resolution mass spectrometry, accurate mass measurements, collision-induced dissociation and ion mobility are combined for a detailed structural characterization of by-products generated during MALDI of polystyrenes holding a labile end-group.

    11. One-component thioxanthone-based polymeric photoinitiators

      Tugce Nur Eren, Neren Okte, Fabrice Morlet-Savary, Jean Pierre Fouassier, Jacques Lalevee and Duygu Avci

      Version of Record online: 21 JUL 2016 | DOI: 10.1002/pola.28227

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      The photochemical and photophysical properties of new polymeric photoinitiators (PPIs) containing pendant thioxanthone and amine moieties are studied. These one-component systems with higher efficiency compared to low molecular-weight counterparts/commercial thioxanthone under violet LED and great reduction of leaching of toxic materials show potential to be used in safer photopolymerization applications.

    12. Synthesis and UCST-type phase behavior of polypeptide with alkyl side-chains in alcohol or ethanol/water solvent mixtures

      Wenjun Liu, Mengxiang Zhu, Jiang Xiao, Ying Ling and Haoyu Tang

      Version of Record online: 21 JUL 2016 | DOI: 10.1002/pola.28230

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      Thermoresponsive polypeptides with alkyl side-chains and UCST-type phase behaviors in both alcoholic solvents and ethanol/H2O solvent mixtures were synthesized via a multi-step synthetic route. The presence of alkyl side-chains played an important role on inducing their UCST-type phase behaviors due to the solvation of these polypeptides related to the van der Waals interaction between the alkyl pendants of polypeptides and alkyl groups of alcoholic solvents. The UCST-type phase transition temperature (Tpt) increased as polymer main-chain length or concentration increased. Elongating the alkyl side-chain length significantly decrease the range of weight percentage of ethanol in the binary solvent.

    13. Photocatalytic and magnetic titanium dioxide/polystyrene/magnetite composite hybrid polymer particles

      Audrey Bonnefond, Miren Ibarra, Edurne Gonzalez, Mariano Barrado, Andrey Chuvilin, José Maria Asua and Jose Ramon Leiza

      Version of Record online: 20 JUL 2016 | DOI: 10.1002/pola.28224

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      Novel multifunctional TiO2/polystyrene/magnetite hybrid composite particle dispersions are synthesized. The TiO2 nanoparticles are present at the surface of the polymer particles to impart photocatalytic functionality and colloidal stability and the magnetic nanoparticles are embedded inside the polymer particles in the subsurface region to allow an easy recovery of the hybrid particles. These hybrid composite particles show good photocatalytic activity toward methylene blue degradation in at least five consecutive cycles.

    14. Enzyme and pH dual responsive l-amino acid based biodegradable polymer nanocarrier for multidrug delivery to cancer cells

      Sonashree Saxena and Manickam Jayakannan

      Version of Record online: 19 JUL 2016 | DOI: 10.1002/pola.28216

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      Dual Drug Delivery: Enzymatic-biodegradable and pH-responsive multistimuli polymer nanoassemblies are tailor-made from l-amino acid resources for intracellular delivery of multiple anticancer drugs to accomplish 100% cell death in cervical and breast cancers.

    15. Comb-like polymers pendanted with elastin-like peptides showing sharp and tunable thermoresponsiveness through dynamic covalent chemistry

      Jie Bo, Lei Wang, Wen Li, Xiuqiang Zhang and Afang Zhang

      Version of Record online: 19 JUL 2016 | DOI: 10.1002/pola.28228

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      Polymers pendanted densely with ELPs show unique thermoresponsiveness. By virtue of amino terminals in ELP pendants, oligoethylene glycol (OEG)-based dendrons cored with aldehyde were attached to the polymers through dynamic covalent imines. This dynamic linkage affords these polymers remarkably tunable thermoresponsiveness dominated by either ELPs or OEG dendrons.

    16. Stimuli-responsive brush-shaped conjugated polymers with pendant well-defined poly(vinyl ether)s

      Jin Motoyanagi, Taketo Ishikawa and Masahiko Minoda

      Version of Record online: 18 JUL 2016 | DOI: 10.1002/pola.28220

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      Brush-shaped conjugated polymers consisting of a poly(phenylene butadiynylene) backbone and pendant well-defined poly(vinyl ether)s were synthesized by oxidative coupling reaction of diethynylbenzen-end-capped macromonomers (DE-PIBVE), which were obtained by living cationic polymerization. Solution of the brush-shaped conjugated polymer [poly(DE-PIBVE)] showed intriguing changes in luminescent color depending on the kinds of medium, concentration and temperature, due to the formation of polymer aggregates by the intermolecular ππ interaction between neighboring conjugated polymer backbone moieties.

    17. Synthesis of poly(ω-pentadecalactone)-b-poly(acrylate) diblock copolymers via a combination of enzymatic ring-opening and RAFT polymerization techniques

      Robin L. Pflughaupt, Sally A. Hopkins, Peter M. Wright and Andrew P. Dove

      Version of Record online: 18 JUL 2016 | DOI: 10.1002/pola.28221

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      Preparation of diblock copolymers of poly(ω-pentadecalactone) (PPDL) via a combination of enzymatic ring-opening polymerization (eROP) and reversible addition-fragmentation chain-transfer (RAFT) polymerization techniques is reported herein. The synthesis of PPDL via eROP is described using Novozyme 435 as a catalyst and a bifunctional initiator/CTA appropriate for the eROP of ω-pentadecalactone (PDL) and RAFT polymerization of acrylic and styrenic monomers. RAFT-functional PPDL was synthesized and chain growth of the macro-CTA was utilized to prepare acrylic and styrenic diblock copolymers of PPDL, demonstrating a facile, metal-free, and “greener” alternative to preparing acrylic diblock copolymers of polyethylene (PE).

    18. Synthesis of polymeric nanocapsules by radical UV-activated interface-emulsion polymerization

      Marco Bazzano, Roberto Pisano, Jack Brelstaff, Maria Grazia Spillantini, Marta Sidoryk-Wegrzynowicz, Giancarlo Rizza and Marco Sangermano

      Version of Record online: 18 JUL 2016 | DOI: 10.1002/pola.28226

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      This paper presents a new methodology, named interface-emulsion polymerization, that allows a better control of the synthesis of polymeric core–shell nanocapsules, having a hydrophilic surface and a hydrophobic core. We successfully synthesized core–shell nanocapsules in various sizes, ranging from 80 nm to 300 nm, by acting either on the process conditions or on the composition of the monomer mixture.

    19. High water-content thermoresponsive hydrogels via electrostatic macrocrosslinking of cellulose nanofibrils

      Tobias Ingverud, Emma Larsson, Guillaume Hemmer, Ramiro Rojas, Michael Malkoch and Anna Carlmark

      Version of Record online: 18 JUL 2016 | DOI: 10.1002/pola.28225

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      Thermoresponsive, free-standing hydrogels were produced from anionic TEMPO-oxidized cellulose nanofibrils (CNF, 0.3 wt%) which were electrostatically crosslinked with cationic tri- and star-block copolymers. Atom transfer radical polymerization (ATRP) was utilized to synthesize the block-copolymers of poly(di(ethylene glycol)methyl ether methacrylate) (PDEGMA) and quaternized poly(2-(dimethylamino)ethyl methacrylate) (qPDMAEMA), starting from dual- or tetra-functional initiators. The resulting hydrogels had a storage modulus of up to 2.9 kPa and water content up to 99.2 wt%.

    20. Polymer cyclization inhibits thermal decomposition of carbon-dioxide-derived poly(propylene carbonate)s

      Satoshi Honda and Hiroshi Sugimoto

      Version of Record online: 13 JUL 2016 | DOI: 10.1002/pola.28222

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      CO2–epoxide alternating copolymerization is one of the promising pathways for transforming CO2 into polycarbonates (PCs), yet synthesis of PCs with nonlinear architecture has mostly been unexplored. In the present work, cyclic PPCs were successfully synthesized for the first time. Moreover, comparison of thermal decomposition temperature (Td) between linear and cyclic PPCs confirms surprisingly enhanced Tds of cyclic PPCs.

    21. Synthesis and tunable properties of oligoaniline-functionalized polyamides

      Mingying Yin, Ying Yan, Justin P. Cole, Erik B. Berda, Fangfei Li, Xincai Liu, Ce Wang and Danming Chao

      Version of Record online: 12 JUL 2016 | DOI: 10.1002/pola.28223

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      Tunable properties, including electroactivity, spectroscopy, electrochromism, conductivity and dielectric, were accomplished by adjusting the content of oligoaniline groups in the polymeric scaffolds.

    22. Polyacrylamide pseudo crown ethers via hydrogen bond-assisted cyclopolymerization

      Yoshihiko Kimura, Yuichiro Miyabara, Takaya Terashima and Mitsuo Sawamoto

      Version of Record online: 9 JUL 2016 | DOI: 10.1002/pola.28218

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      Hydrogen bond-assisted cyclopolymerization of bisacrylamides comprising poly(ethylene oxide) spacers were developed to synthesize polyacrylamide pseudo crown ethers with 15–24-membered in-chain rings. The key is the intramolecular hydrogen-bonding of the monomers in halogenated solvents for efficient cyclization. Typically, a bisacrylamide with a hexa(ethylene oxide) spacer (PEG6DAAm) homogeneously allowed controlled radical cyclopolymerization without any additives in 1,2-dichloroethane to directly provide cyclopolyacrylamides with 24-membered rings.

    23. You have full text access to this OnlineOpen article
      Properties of acyl modified poly(glycerol-adipate) comb-like polymers and their self-assembly into nanoparticles

      Vincenzo Taresco, Jiraphong Suksiriworapong, Rhiannon Creasey, Jonathan C. Burley, Giuseppe Mantovani, Cameron Alexander, Kevin Treacher, Jonathan Booth and Martin C. Garnett

      Version of Record online: 8 JUL 2016 | DOI: 10.1002/pola.28215

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      The pendant-side hydroxyl moiety of poly(glycerol-adipate) (PGA) was acylated with a set of fatty acids of chain length C4, C8, and C18 (PGAB, PGAO, and PGAS, respectively) at different degrees of grafting. These modifications yielded comb-like polymers that modulated the hydrophilic–hydrophobic balance of PGAx. The length of the fatty ester side-chains and degree of substitution considerably affected the physicochemical properties of the resulting polymers and their ability to form nanoparticles.

  11. Original Articles

    1. Synthesis, characterization, and preceramic properties of π-conjugated polymers based on Ni(II) complexes of goedken's macrocycle

      Joseph A. Paquette and Joe B. Gilroy

      Version of Record online: 2 JUL 2016 | DOI: 10.1002/pola.28211

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      Sonogashira cross-coupling polymerization was used to produce a series of π-conjugated copolymers containing Ni(II) complexes of Goedken's macrocycle. The polymers showed interesting redox and spectroscopic properties, which were probed by comparison to model compounds. Postpolymerization functionalization via the alkyne synthetic handle led to a heterobimetallic polymer that produced ceramic nanomaterials upon pyrolysis at 800 °C in a reducing atmosphere.

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