Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 50 Issue 3

1 February 2012

Volume 50, Issue 3

Pages i–iv, 409–614

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Articles
    4. Erratum
    1. You have free access to this content
      Cover Image, Volume 50, Issue 3 (pages i–ii)

      Article first published online: 21 DEC 2011 | DOI: 10.1002/pola.25883

      Thumbnail image of graphical abstract

      Microparticles containing various core materials are prepared via a dispersion polymerization using the primary amine-catalyzed Michael addition of a trifunctional thiol to a trifunctional acrylate, as presented by C. O. Bounds, R. Goetter, J. A. Pojman, and M. Vandersall on page 409. The thiol-acrylate microparticles containing pockets of core material are applied to various systems to improve the desired characteristics of the given system. The addition of Lewis acid initiator-containing thiol-acrylate microparticles to multifunctional epoxy resins yeilds epoxy systems in which the rheological properties are improved while the strength of the resulting polymer products is retained. This method of microencapsulation has multiple advantages over other methods of microencapsulation, as these microparticles can be prepared with a minimal number of components in less than one hour at room temperature and ambient pressure.

    2. You have free access to this content
      Inside Cover, Volume 50, Issue 3 (pages iii–iv)

      Article first published online: 21 DEC 2011 | DOI: 10.1002/pola.25884

      Thumbnail image of graphical abstract

      The core of the paper by Wei Lu, Dan Chen, Han Jiang, Liming Jiang, and Zhiquan Shen on page 590 includes two parts: the selective and sensitive recognition of fluoride through the obtained copolymer-based probe poly(MMA-co-VNT), as well as the fabrication of the molecular-scale complementary “INHIBIT/IMPLICATION” logic gates. Accordingly, the cover image designed is also composed of two parts. The first part demonstrates the selective recognition process: the colorless solution of poly(MMA-co- VNT) becomes yellow upon binding of fluoride ions. The second part describes the logic gates: the logic circuit at the bottom right of the cover image represents the function of complementary “INHIBIT/IMPLICATION” logic gates.

  2. Articles

    1. Top of page
    2. Cover Image
    3. Articles
    4. Erratum
    1. Preparation and application of microparticles prepared via the primary amine-catalyzed michael addition of a trithiol to a triacrylate (pages 409–422)

      Christopher O. Bounds, Ronald Goetter, John A. Pojman and Max Vandersall

      Article first published online: 14 OCT 2011 | DOI: 10.1002/pola.25032

      Thumbnail image of graphical abstract

      Microparticles containing various core materials were prepared via the octyl amine catalyzed Michael addition of trimethylolpropane tris(3-mercaptopropionate) to trimethylolpropane triacrylate. A borontrichloride-amine complex initiator was successfully encapsualted in a thiol-acrylate matrix. The addition of these BCl3-amine microparticles to a multifunctional epoxy resin, trimethylolpropane triglycidyl ether or bisphenol A diglycidyl ether, yeilded epoxy systems in which the rheological properties were improved while the strength of the resulting polymer products were retained.

    2. Confinement and controlled release of quinine on chitosan–montmorillonite bionanocomposites (pages 423–430)

      Ghanshyam V. Joshi, Bhavesh D. Kevadiya, Haresh M. Mody and Hari C. Bajaj

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25046

      Thumbnail image of graphical abstract

      A series of chitosan (CS) intercalated montmorillonite (MMT) bionanocomposites were prepared via ion-exchange, followed by adsorption of quinine (QUI). Chitosan has a good miscibility with MMT due to its hydrophilic and polycationic nature in acidic media. As a result, it can easily intercalate with MMT by means of cation exchange process. The adsorption of QUI on CS–MMT was mainly attributed to the interaction between functional groups of the QUI and CS, and to some extent the interaction with clay [BOND]OH groups present at the clay surface.

    3. Synthesis and thermal crosslinking of carbosiloxane and oligo(oxyethylene) polymers (pages 431–440)

      Paula A. Delgado, Piotr Matloka, Fabio Zuluaga and Kenneth B. Wagener

      Article first published online: 31 OCT 2011 | DOI: 10.1002/pola.25048

      Thumbnail image of graphical abstract

      A series of saturated and unsaturated carbosiloxane and oligo(oxyethylene)-based polymers were synthesized by acyclic diene metathesis ADMET polymerization using silacyclobutane as chain-end thermally induced crosslinker. Subsequent thermal treatment of telechelic polymers leads to cured materials with stress-–strain behavior comparable to related thermoset polymers.

    4. Exhaustive and partial alkoxylation of polymethylhydrosiloxane by copper-catalyzed dehydrocoupling with alcohols: Synthesis, crosslinking behavior, and thermal properties of the products (pages 441–450)

      Ryosuke Iinuma, Poreddy Narsi Reddy, Teruyuki Hayashi and Masato Tanaka

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25049

      Thumbnail image of graphical abstract

      Polymethylhydrosiloxane (PMHS) reacts with aliphatic and aromatic alcohols at room temperature in the presence of [CuH(PPh3)]6 complex catalyst to give exhaustively and partially alkoxylated PMHS. Partially propargyloxylated PMHSs undergo crosslinking upon heating and display high thermal stability [Td5 (temperature of 5% weight loss) > 500 °C] as compared with starting PMHS (243 °C) and exhaustively propargyloxylated one (414 °C).

    5. Design and proof of reversible micelle-to-vesicle multistimuli-responsive morphological regulations (pages 451–457)

      Qiao Jin, Christoph Luy, Jian Ji and Seema Agarwal

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25050

      Thumbnail image of graphical abstract

      A novel azobenzene-containing block copolymer poly(ethylene oxide)-b-poly(2-(diethylamino)ethyl methacrylate-co-6-(4-phenylazo phenoxy)hexyl methacrylate) (PEO-b-P(DEAEMA-co-PPHMA)) showed reversible morphological transition from micelles to vesicles. The reversible micelle-to-vesicle morphological transitions in aqueous solution could be realized in response to multiple stimuli i.e. pH, light and addition of cyclodextrin. Such system could be promising for applications of targeted encapsulation in nanomaterials.

    6. Synthesis and property of novel amino acid-based polymers by self-polyaddition of monomers containing both oxetanyl and carboxyl groups (pages 458–465)

      Hiroto Kudo, Toshiki Ohshiro, Hiroyuki Atsumi, Ayako Kamio, Tadatomi Nishikubo and Saeko Murakami

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25053

      Thumbnail image of graphical abstract

      This article reports the development of new strategy for polymers containing amino acids in the main chain. Monomers containing both oxetanyl and carboxyl groups were synthesized derived from amino acids, and self-polyaddition and self-copolyaddition of these monomers afforded the corresponding polymers containing amino acids in the main chain. The obtained amino -acid- based polymers had good solubility, high- glass transition temperature, high thermal stability, and good biodegradability.

    7. Asymmetric anionic polymerizations of 7-cyano-7-alkoxycarbonyl-1,4-benzoquinone methides (pages 466–479)

      Takeshi Nagai, Takahiro Uno, Masataka Kubo and Takahito Itoh

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25054

      Thumbnail image of graphical abstract

      Asymmetric anionic polymerizations of 7-cyano-7-alkoxycarbonyl-1,4-benzoquinone methides (1) with various alkoxy groups were performed using various chiral initiators such as lithium isopropylphenoxide (iPrPhOLi)/(S)-(–)-2,2′-isopropylidene-bis(4-phenyl-2-oxazoline) ((–)-PhBox) and lithium isopropylphenoxide (iPrPhOLi)/(–)-sparteine ((–)-Sp) to investigate the effect of the alkoxy groups of alkoxycarbonyl substituent in the monomers 1 and chiral ligands of chiral initiators on the control of chiral center in the formation of polymers. Molar optical rotation values of the polymers obtained were significantly dependent upon alkoxy groups. High stereoselectivity was observed at the propagation reaction, but not at the initiation reaction. The effect of the counterion on the control of chiral center was also investigated and discussed.

    8. Star-shaped polymer PFStODO by atom transfer radical polymerization: Its synthesis, characterization, and fluorescence property (pages 480–487)

      Pei-Yang Gu, Cai-Jian Lu, Qing-Feng Xu, Gao-Jie Ye, Wei-Qiang Chen, Xuan-Ming Duan, Li-Hua Wang and Jian-Mei Lu

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25055

      Thumbnail image of graphical abstract

      A star-shaped polymer PFStODO was prepared by ATRP using a tetra-functional initiator pentaerythritol tetrakis(2-bromoisobutyrate)4Bri-Bu. Although the solution of polymer preserves strong blue-light emission, the film of polymer is surprisingly white emissive ranging from 400 to −700 nm, the whole visible light region.

    9. Synthesis of a “molecular rope curtain”: Preparation and characterization of a sliding graft copolymer with grafted poly(ethylene glycol) side chains by the “grafting onto” strategy (pages 488–494)

      Jun Araki, Kousaku Ohkawa, Yusuke Uchida and Yoshihiko Murakami

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25056

      Thumbnail image of graphical abstract

      A sliding graft copolymer (SGC) with poly(ethylene glycol) (PEG) side chains was prepared by ester formation between terminal carboxyl groups of oxidized PEG poly(ethylene glycol) methyl ether with molecular weight of 2000 (mPEG2000-COOH) and hydroxyl groups of a polyrotaxane consisting of poly(ethylene glycol) (PEG) and cyclodextrins (CDs). Formation of the SGC structure was confirmed by 1H NMR, ATR-FTIR, and gel permeation chromatography. The SGC was soluble in good solvents for PEG, and insoluble in poor solvents for PEG. Estimation of the number of grafted mPEG chains suggested a “rope-curtain” like structure, in which an mPEG chain is connected to each CD ring.

    10. Modulating light-tunable acid sensitivity of a bioinspired polymer simply by adjusting the position of a single methoxy substituent (pages 495–508)

      Zhilin Liu, Yufang Tang, Nan Li, Lican Lu, Junjie Deng and Yuanli Cai

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25057

      Thumbnail image of graphical abstract

      This article describes a rhodopsin-inspired photosensitive polymer whose light-tunable acid sensitivity was widely modulated simply by adjusting the position of a single methoxy substituent in aromatic rings of cinnamyl groups. The methoxy substitution in either para or ortho position of aromatic rings of cinnamyl groups led to the different photoinduced Z-isomerization behaviors and remarkable effects on the acid sensitivity of their neighboring acid-liable cyclic acetal linkages.

    11. Synthesis of imidazolium-functionalized ionic polyurethane and formation of CdTe quantum dot–polyurethane nanocomposites (pages 509–516)

      Xue Li, Xufeng Ni, Zhenhua Liang and Zhiquan Shen

      Article first published online: 7 NOV 2011 | DOI: 10.1002/pola.25058

      Thumbnail image of graphical abstract

      Fluorescent nanocrystal–polymer composites CdTe–ionic polyurethane (IPU) can be prepared by the electrostatic interaction between the positively charged IPUs and the negatively charged aqueous CdTe quantum dots. The nanocomposites obtained show well-photochemical stability, strong fluorescent emission, and good film building properties.

    12. Polymer-based colorimetric and “turn off” fluorescence sensor incorporating benzo[2,1,3]thiadiazole moiety for Hg2+ Detection (pages 517–522)

      Xiao Ma, Fengyan Song, Lu Wang, Yixiang Cheng and Chengjian Zhu

      Article first published online: 12 NOV 2011 | DOI: 10.1002/pola.25059

      Thumbnail image of graphical abstract

      Polymer-based colorimetric and “turn off” fluorescence sensor can exhibit the most pronounced fluorescence response to Hg2+ detection without interference from other metal ions.

    13. Copolymerizations of propylene with functionalized long-chain α-olefins using group 4 organometallic catalysts and their membrane application (pages 523–533)

      Ping Zhao, Dina Shpasser and Moris S. Eisen

      Article first published online: 12 NOV 2011 | DOI: 10.1002/pola.25060

      Thumbnail image of graphical abstract

      The copolymerization of polar with nonpolar α-olefins is presented. The copolymers were synthesized using metallocene complexes. For various polar substrates large incorporations (15–22 mol %) were obtained. Membranes that were casted from the copolymers, using the inverse methodology, could be wetted in contrast to the pristine polypropylene membranes. The membranes with the long chain alcohol comonomer exhibited outstanding water flux performances.

    14. Synthesis and characterization of all-conjugated copolymers of 3-hexyl-thiophene and EDOT by grignard metathesis polymerization (pages 534–541)

      Luciano Miozzo, Nicolas Battaglini, Daniele Braga, Loïg Kergoat, Clément Suspène and Abderrahim Yassar

      Article first published online: 9 NOV 2011 | DOI: 10.1002/pola.25062

      Thumbnail image of graphical abstract

      Grignard metathesis (GRIM) polymerization has been applied to prepare random soluble copolymers of 3-hexyl-thiophene and 3,4-ethylenedioxythiophene (EDOT). These copolymers show a very high degree of regioregularity. The monomer ratio within the polymer is very close to the feed ratio, showing that the two monomers have similar reactivities under the GRIM conditions. The presence of EDOT units causes a slight change of the optical properties and a strong modification of the thin film morphology.

    15. Polymeric hydrogels modified with ornithine and lysine: Sorption and release of metal cations and amino acids (pages 542–550)

      Jan Romanski, Marcin Karbarz, Krystyna Pyrzynska, Janusz Jurczak and Zbigniew Stojek

      Article first published online: 9 NOV 2011 | DOI: 10.1002/pola.25063

      Thumbnail image of graphical abstract

      Hydrogels containing available α-amino acid groups can be prepared by free-radical copolymerization of acryloyl and methacryloyl derivatives of ornithine and lysine. The gel volume depends on the amount of amino acid groups and the presence of metal ions. The metal ions capable of creating complexes with α-amino acid groups trigger the shrinking process. The Cu2+ sorption process proceeds in accordance with the Langmuir isotherm. The presence of available α-amino acid groups attached to the polymer network opens up the possibility of binding the compounds which can cocomplex the bound metal ions. These compounds could be released from the gel by changing pH.

    16. Synthesis and characterization of new selenophene-based conjugated polymers for organic photovoltaic cells (pages 551–561)

      Woo-Hyung Lee, Sang Kyu Lee, Seon Kyoung Son, Ji-Eun Choi, Won Suk Shin, Kyoungkon Kim, Soo-Hyoung Lee, Sang-Jin Moon and In-Nam Kang

      Article first published online: 11 NOV 2011 | DOI: 10.1002/pola.25064

      Thumbnail image of graphical abstract

      Various strategies were explored to chemically modify the selenophene backbone structure, and it was found that they lead to changes in the backbone conformation as well as in the solubility, absorption spectra, energy levels, charge transport, blend film morphology, and photovoltaic properties of the resulting polymers.

    17. Functionalization of vinylic addition polynorbornenes via efficient copolymerization of norbornene using Ni(II)-Me complexes (pages 562–570)

      Dong-Po Song, Hong-Liang Mu, Xin-Cui Shi, Yan-Guo Li and Yue-Sheng Li

      Article first published online: 9 NOV 2011 | DOI: 10.1002/pola.25065

      Thumbnail image of graphical abstract

      A series of β-ketiminato Ni(II)-Me pyridine complexes is shown to be highly active towards the copolymerization of norbornene (NB) with 5-norbornene-2-yl acetate (NBA) or 5-norbornene-2-methanol (NBM), which could be an efficient methodology for functionalization of polynorbornene (PNB). The resultant copolymers have high molecular weights, different contents of ester units or hydroxyl groups and well solubility in common organic solvents.

    18. R-RAFT approach for the polymerization of N-isopropylacrylamide with a star poly(ε-caprolactone) core (pages 571–580)

      Qingqing Bian, Yan Xiao and Meidong Lang

      Article first published online: 9 NOV 2011 | DOI: 10.1002/pola.25066

      Thumbnail image of graphical abstract

      A series of well-defined star diblock [poly(ε-caprolactone)-b-poly(N-isopropylacrylamide)]4 (SPCLNIP) copolymers were synthesized by combination of ring-opening polymerization and reversible addition-fragmentation chain transfer (RAFT) polymerization. The controlled/living character of R-RAFT was maintained by careful control over polymerization conditions. The reactive trithiocarbonate groups were transferred to polymer chain ends by R-RAFT. Further modification of the end groups was expected to render the star block copolymer functionalized and bioactive as potential biomedical materials.

    19. Jacketed homopolymer with bipolar dendritic side groups and its applications in electroluminescent devices (pages 581–589)

      Wei Zhang, Hao Jin, Dan Wang, Zengze Chu, Zhihao Shen, Dechun Zou and Xinghe Fan

      Article first published online: 16 NOV 2011 | DOI: 10.1002/pola.25067

      Thumbnail image of graphical abstract

      A jacketed homopolymer with bipolar dendritic side groups was synthesized through a conventional radical polymerization. The homopolymer had both hole- and electron-transporting capabilities. The single-layer device of the homopolymer showed the best performance with the maximum luminance of 214 cd/m2, maximum external efficiency of 0.086%, and maximum current efficiency of 0.115 cd/A.

    20. Polymer-based fluoride-selective chemosensor: Synthesis, sensing property, and its use for the design of molecular-scale logic devices (pages 590–598)

      Wei Lu, Dan Chen, Han Jiang, Liming Jiang and Zhiquan Shen

      Article first published online: 9 NOV 2011 | DOI: 10.1002/pola.25068

      Thumbnail image of graphical abstract

      A new kind of polymeric sensory materials has been synthesized through reversible addition fragmentation chain transfer polymerization technique. The polymer receptor exhibited high selectivity toward fluoride anions in both UV–vis and fluorescence channels. Especially, the fluoride-induced chromogenic process could be fully reversed by the addition of HSO4. The reversible and reproducible characteristics of the colorimetric switch allow the design of a molecular-scale sequential memory unit displaying “writing–reading–erasing–reading” behavior and “multiwrite” functions.

    21. Synthesis and self-assembly of diblock copolymers bearing 2-nitrobenzyl photocleavable side groups (pages 599–608)

      Jean-Marc Schumers, Olivier Bertrand, Charles-André Fustin and Jean-François Gohy

      Article first published online: 9 NOV 2011 | DOI: 10.1002/pola.25069

      Thumbnail image of graphical abstract

      Light-responsive poly(2-nitrobenzyl acrylate-random-acrylic acid)-block-polystyrene (P(NBA-r-AA)-b-PS) block copolymers (P(NBA-r-AA)-b-PS) have been synthesized and further self-assembled in solution as well as in thin films. In solution, the block copolymers were used to encapsulate hydrophilic molecules inside the core of light-induced micelles. In addition, light-responsive nanostructured thin films have been prepared onto silicon substrates. Exposing these films to UV irradiation generates chemical functionalities inside the photo-responsive nanodomains.

    22. SET-LRP of acrylonitrile in ionic liquids without any ligand (pages 609–613)

      Jing Ma, Hou Chen, Min Zhang and Mengmeng Yu

      Article first published online: 12 NOV 2011 | DOI: 10.1002/pola.25070

      Thumbnail image of graphical abstract

      Use of ionic liquids as reaction media was investigated in the design of an environmentally friendly single electron transfer-living radical polymerization (SET-LRP) for acrylonitrile (AN) without any ligand by using Fe(0) wire as catalyst and 2-bromopropionitrile as initiator. 1-Methylimidazolium acetate ([mim][AT]), 1-methylimidazolium propionate ([mim][PT]), and 1-methylimidazolium valerate ([mim][VT]) were applied in this study, respectively. The sequence of the apparent polymerization rate constants of SET-LRP of AN was kapp ([mim][AT]) > kapp ([mim][PT]) > kapp ([mim][VT]). The living feature of the polymerization was also confirmed by chain extensions of polyacrylonitrile with methyl methacrylate. All three ionic liquids were recycled and reused and had no obvious effect on the controlled/living nature of SET-LRP of AN.

  3. Erratum

    1. Top of page
    2. Cover Image
    3. Articles
    4. Erratum
    1. You have free access to this content

SEARCH

SEARCH BY CITATION