Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 51 Issue 5

1 March 2013

Volume 51, Issue 5

Pages i–iv, 995–1261

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Highlight
    4. Rapid Communication
    5. Articles
    1. You have free access to this content
      Cover Image, Volume 51, Issue 5 (pages i–ii)

      Article first published online: 25 JAN 2013 | DOI: 10.1002/pola.26543

      Thumbnail image of graphical abstract

      The cover image shows a schematic structure of a hyperbranched polyether. These dendritic polymers are a particularly interesting class of chemically stable and often highly biocompatible materials, as demonstrated in the Highlight article by Martina Schömer, Christoph Schüll, and Holger Frey on page 995. Furthermore, the image shows the two main types of monomers employed for the preparation of such multifunctional branched polyethers, i.e., hydroxyl-functional epoxides and oxetanes. Recent achievements by the authors in this area include a wide range of hyperbranched copolymers with established epoxide monomers, such as ethylene oxide and propylene oxide. Frey et al. review the progress in the preparation, characterization, and application of these uniquely versatile aliphatic polyols.

    2. You have free access to this content
      Inside Cover, Volume 51, Issue 5 (pages iii–iv)

      Article first published online: 25 JAN 2013 | DOI: 10.1002/pola.26544

      Thumbnail image of graphical abstract

      Synthesis, characterization, and transistor applications of PBTSB and PBTFN polymers containing stilbene and fumaronitrile moieties are presented on page 1029 by Dong-Yu Kim and colleagues. The cover image depicts the polarized optical microscopy (POM, micrometer scale), atomic force microscopy (AFM, nanometer scale), and time-dependent density functional theory (TDDFT, molecular scale) calculation images of PBTFN. The crystalline phase and self-assembly of PBTFN are attributed to the bithiophenefumaronitrile (donor-acceptor) intermolecular interaction. Electron transport is improved due to the well-ordered molecular packing in the fibrillar structure after thermal annealing.

  2. Highlight

    1. Top of page
    2. Cover Image
    3. Highlight
    4. Rapid Communication
    5. Articles
    1. Spotlight Article

      You have free access to this content
      Hyperbranched aliphatic polyether polyols (pages 995–1019)

      Martina Schömer, Christoph Schüll and Holger Frey

      Article first published online: 26 DEC 2012 | DOI: 10.1002/pola.26496

      Thumbnail image of graphical abstract

      Hyperbranched polymers combine several advantages of the perfectly branched dendrimers (e.g., multifunctionality) with easy accessibility, typically in a one-step synthesis. Amongst them, hyperbranched polyethers are a particularly interesting and established class of chemically stable and often biocompatible materials. They can be prepared via anionic and cationic polymerization mechanisms with comparably low polydispersities, using hydroxyl-functional epoxides or oxetanes. Their unusual mechanical, thermal, and solution properties render them useful for a variety of applications, e.g., as building blocks for various complex macromolecular architectures or in biomedical and electronic applications.

  3. Rapid Communication

    1. Top of page
    2. Cover Image
    3. Highlight
    4. Rapid Communication
    5. Articles
    1. Pd-mediated polymerization of diazoacetates with aromatic ester group: Synthesis and photophysical property of poly(1-pyrenylmethoxycarbonylmethylene) (pages 1020–1023)

      Eiji Ihara, Ryoji Okada, Takanobu Sogai, Tetsuya Asano, Masami Kida, Kenzo Inoue, Tomomichi Itoh, Hiroaki Shimomoto, Yukihide Ishibashi and Tsuyoshi Asahi

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26480

      Thumbnail image of graphical abstract

      Pd-mediated polymerization of 1-pyrenylmethyl diazoacetates affords poly(1-pyrenylmethoxycarbonylmethylene) (poly4′), whose C[BOND]C main chain is tightly surrounded by pyrene groups. The intensity ratio of excimer emission to monomer emission (IE/IM) of poly4′ was more than 20 times higher than that of its vinyl polymer counterpart of poly(1-pyrenylmethyl methacrylate) (polyPyrMA), clearly demonstrating much higher efficiency for excimer formation in poly4′, because of the tight arrangement of the pyrene groups around the main chain.

    2. Polystyrene/clay nanocomposites by atom transfer radical nitroxide coupling chemistry (pages 1024–1028)

      Muhammed Aydin, Mehmet Atilla Tasdelen, Tamer Uyar, Steffen Jockusch, Nicholas J. Turro and Yusuf Yagci

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26493

      Thumbnail image of graphical abstract

      An efficient protocol, atom transfer radical nitroxide coupling chemistry, for the preparation of polymer/clay nanocomposites via grafting-onto strategy with well-defined polymer, which were synthesized via atom transfer radical polymerization, has been described. The radical coupling, taking place between the clay layers, not only leads to attached polymer chains but also to successful nanocomposite formation with highly exfoliated morphology.

  4. Articles

    1. Top of page
    2. Cover Image
    3. Highlight
    4. Rapid Communication
    5. Articles
    1. Synthesis and characterization of a novel ambipolar polymer semiconductor based on a fumaronitrile core as an electron-withdrawing group (pages 1029–1039)

      Hyung-Gu Jeong, Dongyoon Khim, Eunhwan Jung, Jin-Mun Yun, Juhwan Kim, Jamin Ku, Yun Hee Jang and Dong-Yu Kim

      Article first published online: 5 DEC 2012 | DOI: 10.1002/pola.26456

      Thumbnail image of graphical abstract

      The effects of electron-withdrawing cyano groups on the electronic properties of the new conjugated polymers are investigated. The lowering of the LUMO energy levels due to the electron-withdrawing properties of the cyano substituents could enhance electron injection capability. The fibrillar structure of PBTFN improved the electron transport.

    2. Synthesis and photoresponsive behavior of azobenzene-containing side-chain liquid crystalline diblock polymers with polypeptide block (pages 1040–1050)

      Xiaohua He, Chunyan Gao, Wuqiong Sun, Wei Huang, Shaoliang Lin and Deyue Yan

      Article first published online: 5 DEC 2012 | DOI: 10.1002/pola.26472

      Thumbnail image of graphical abstract

      Well-defined azobenzene-containing side-chain liquid crystalline diblock copolymers with polypeptide block were prepared by a combination of atom transfer radical polymerization, ring-opening polymerization, and click reaction.

    3. Synthesis and photovoltaic performances of benzo[1,2-b:4,5-b']dithiophene-alt-2,3-diphenylquinoxaline copolymers pending functional groups in phenyl rings (pages 1051–1057)

      Hua Tan, Xianping Deng, Junting Yu, Jianhua Chen, Kaixuan Nie, Ying Huang, Yu Liu, Yafei Wang, Meixiang Zhu and Weiguo Zhu

      Article first published online: 4 DEC 2012 | DOI: 10.1002/pola.26477

      Thumbnail image of graphical abstract

      Two donor/acceptor (D/A)-based benzo[1,2-b:4,5-b']dithiophene-alt-2,3-biphenyl quinoxaline copolymers of P1 and P2 were synthesized pending different functional groups (thiophene or triphenylamine) in the 4-positions of phenyl rings. A power conversion efficiency (PCE) of 3.43%, an open-circuit voltage of 0.80 V and a short-circuit current of 9.20 mA cm-2 were achieved in the triphenylamine-containing P2-based cell under the illumination of AM 1.5, 100 mW cm-2.

    4. Spotlight Article

      Gelation and adhesion behavior of mussel adhesive protein mimetic polymer (pages 1058–1065)

      Jin Nishida, Motoyasu Kobayashi and Atsushi Takahara

      Article first published online: 5 DEC 2012 | DOI: 10.1002/pola.26487

      Thumbnail image of graphical abstract

      An acrylamide-type copolymer containing catechol, amino, and hydroxyl groups was synthesized as a mimetic of the natural mussel adhesive protein (MAP). An aqueous solution of the obtained copolymer formed a hydrogel within 2 h under air. Two aluminum plates were adhered by the gelation of the MAP mimetic copolymer solution under humid air at room temperature. The interfacial region between the two aluminum plates failed at a lap shear strength of 0.46 MPa.

    5. Synthesis of block and graft copolymers of styrene by raft polymerization, using dodecyl-based trithiocarbonates as initiators and chain transfer agents (pages 1066–1078)

      Kannukaran Ponnusamy, Rajendran Prakash Babu and Raghavachari Dhamodharan

      Article first published online: 4 DEC 2012 | DOI: 10.1002/pola.26466

      Thumbnail image of graphical abstract

      A series of dodecyl-based monofunctional trithiocarbonate chain transfer agents (CTAs) are successfully synthesized toward the RAFT polymerization of styrene. The CTAs are used as initiators for RAFT polymerization, in the absence of the conventional free radical initiator, at higher temperature. Polystyrene of narrow PDI is synthesized. Subsequently, poly(styrene-b-benzyl methacrylate) diblock and poly(styrene-b-benzyl methacrylate-b-2-vinyl pyridine) triblock copolymers are synthesized from the polystyrene macro-RAFT agent by simply heating with the second and third monomer, respectively.

    6. Photocaged pendent thiol polymer brush surfaces for postpolymerization modifications via thiol-click chemistry (pages 1079–1090)

      Ryan M. Hensarling, Emily A. Hoff, Arthur P. LeBlanc, Wei Guo, Santosh B. Rahane and Derek L. Patton

      Article first published online: 27 NOV 2012 | DOI: 10.1002/pola.26468

      Thumbnail image of graphical abstract

      Polymer brush pendent photolabile thiols were designed for postpolymerization surface modification. Addressing the protecting groups with light enables a plethora of thiol-mediated transformations with isocyanates and maleimides via thiol-isocyanate and thiol-Michael click reactions providing a versatile route to create complex, functional polymer surfaces.

    7. SET-LRP synthesis of PMHDO-g-PNIPAM well-defined amphiphilic graft copolymer (pages 1091–1098)

      Aishun Ding, Guolin Lu, Hao Guo, Xingliang Zheng and Xiaoyu Huang

      Article first published online: 5 DEC 2012 | DOI: 10.1002/pola.26469

      Thumbnail image of graphical abstract

      A well-defined amphiphilic graft copolymer, bearing hydrophobic polyallene-based backbone and hydrophilic poly(N-isopropylacrylamide) side chains, was synthesized by the combination of living coordination polymerization, single electron transfer-living radical polymerization, and the grafting-from strategy.

    8. Synthesis of PMHDO-g-PDEAEA well-defined amphiphilic graft copolymer via successive living coordination polymerization and SET-LRP (pages 1099–1106)

      Guolin Lu, Yongjun Li, Hongsheng Gao, Hao Guo, Xingliang Zheng and Xiaoyu Huang

      Article first published online: 5 DEC 2012 | DOI: 10.1002/pola.26470

      Thumbnail image of graphical abstract

      A series of well-defined amphiphilic graft copolymers, bearing hydrophobic polyallene-based backbone and hydrophilic poly(2-(diethylamino)ethyl acrylate) side chains, was synthesized by the combination of living coordination polymerization, single electron transfer-living radical polymerization, and the grafting-from strategy.

    9. Synthesis, surface property, micellization and pH responsivity of fluorinated gradient copolymers (pages 1107–1117)

      Jie Chen, Jin-Jin Li and Zheng-Hong Luo

      Article first published online: 4 DEC 2012 | DOI: 10.1002/pola.26473

      Thumbnail image of graphical abstract

      Fluorinated poly(AA-grad-HFBMA) gradient copolymer was prepared via the combination of semi-batch ATRcoP and hydrolysis reaction. Its surface properties, micellization behaviors and the effect of pH on the micellization behaviors were investigated experimentally.

    10. Well-defined poly(oxazoline)-b-poly(acrylate) amphiphilic copolymers: From synthesis by polymer–polymer coupling to self-organization in water (pages 1118–1128)

      Brieuc Guillerm, Sophie Monge, Vincent Lapinte and Jean-Jacques Robin

      Article first published online: 5 DEC 2012 | DOI: 10.1002/pola.26474

      Thumbnail image of graphical abstract

      Original amphiphilic poly(2-methyl-2-oxazoline)-b-poly(tert-butyl acrylate) (P(MOx)n-b-P(t-BA)m) copolymers are prepared from well-defined ω-N3-P(t-BA) and α-alkyne-P(MOx) homopolymers by polymer–polymer coupling. Both homopolymers and resulting copolymers are fully characterized. Then, the self-assembly in water of amphiphilic P(MOx)n-b-P(t-BA)m is reported, showing the obtaining of well-defined monodisperse spherical micelles for which critical micellar concentration is determined.

    11. Functional polysilanes of relevance for the synthesis of Au and Au–Pd nanoparticle assemblies—a study on the role of polymer-supported thioether side chains (pages 1129–1136)

      Ravi Shankar and Usharani Sahoo

      Article first published online: 5 DEC 2012 | DOI: 10.1002/pola.26475

      Thumbnail image of graphical abstract

      The role of functional polysilanes with thioether side chains to facilitate the assembly formation of Au as well as Au–Pd bimetallic nanoparticles has been demonstrated.

    12. Aluminum salen and salan complexes in the ring-opening polymerization of cyclic esters: Controlled immortal and copolymerization of rac-β-butyrolactone and rac-lactide (pages 1137–1146)

      Edward D. Cross, Laura E. N. Allan, Andreas Decken and Michael P. Shaver

      Article first published online: 5 DEC 2012 | DOI: 10.1002/pola.26476

      Thumbnail image of graphical abstract

      Aluminum-based salen and salan complexes mediate the living and immortal ROP of rac-β-butyrolactone and rac-lactide with excellent control over the polymerizations, yielding polymers with controlled molecular weights and narrow PDIs. Copolymerization of these monomers to yield poly(lactic acid)-co-poly(3-hydroxybutyrate) is successful under neat conditions at 120 °C and in solution at 85 °C, representing the first systems to yield well-controlled copolymers. A strong bias for rac-lactide insertion over rac-β-butyrolactone is observed.

    13. RAFT-mediated emulsion polymerization of styrene using brush copolymer as surfactant macro-RAFT agent: Effect of the brush copolymer sequence and chemical composition (pages 1147–1161)

      Jianxiong Xu, Xin Xiao, Yaoyao Zhang, Wangqing Zhang and Pingchuan Sun

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26478

      Thumbnail image of graphical abstract

      Amphiphilic brush polymers with different monomer sequence and chemical composition are synthesized and their application as macro-RAFT agent in the emulsion RAFT polymerization of styrene is explored. It is found that the monomer sequence in the brush polymers exerts great influence on the emulsion polymerization and the triblock copolymer colloidal morphology is firmly ascribed to the hydrophobic block extension.

    14. Ring-opening polymerization of L-lactide using half-titanocene complexes of the ATiCl2Nu type: Synthesis, characterization, and thermal properties (pages 1162–1174)

      Emmanuel Saridis, Serafeim-Dionysios Maroulas and Marinos Pitsikalis

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26479

      Thumbnail image of graphical abstract

      Half-titanocene complexes were used for the polymerization of L-lactide, LLA. Most of these systems were proven to be very efficient initiators for the ring opening polymerization of LLA. The thermal properties of the produced polymers were examined by differential scanning calorimetry and thermogravimetric analysis. The activation energy of the thermal decomposition was calculated by the Ozawa–Flynn–Wall and Kissinger methods.

    15. Polymeric phthalates: Potential nonmigratory macromolecular plasticizers (pages 1175–1184)

      Rebecca Braslau, Friederike Schäffner and Aruna Earla

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26485

      Thumbnail image of graphical abstract

      Several 4-vinyl phthalate esters are synthesized using Suzuki coupling. Nitroxide mediated-polymerization is used to form short homopolymers and random copolymers with n-butyl acrylate. These polymeric phthalates have the potential to act as nonmigratory plasticizers for PVC. Use in consumer products could address the health issues associated with monomeric phthalate plasticizers, which are implicated as endocrine disrupting compounds.

    16. Efficient zinc initiators supported by NNO-tridentate ketiminate ligands for cyclic esters polymerization (pages 1185–1196)

      Hui-Ju Chuang, Hsiao-Li Chen, Bor-Hunn Huang, Tsung-En Tsai, Pei-Ling Huang, Tzu-Ting Liao and Chu-Chieh Lin

      Article first published online: 22 DEC 2012 | DOI: 10.1002/pola.26486

      Thumbnail image of graphical abstract

      Ring-opening polymerization of cyclic esters, L-lactide, ε-caprolactone, ε-decalactone, β-butyrolactone by a series of heteroleptic bimetallic zinc complexes supported by NNO-tridentate ketiminate ligands has been reported.

    17. Synthesis of high molecular weight and narrow molecular weight distribution poly(acrylonitrile) via RAFT polymerization (pages 1197–1204)

      Shaogan Niu, Lifen Zhang, Jian Zhu, Wei Zhang, Zhenping Cheng and Xiulin Zhu

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26488

      Thumbnail image of graphical abstract

      A highly effective RAFT agent BCCDP was used to the RAFT polymerization of AN to synthesize well-defined high molecular weight PAN with controlled molecular weight and narrow molecular weight distribution. The PAN fibers with diameters from 247 to 1094 nm can be obtained via electrospinning.

    18. A facile method for the preparation of thermally remendable cross-linked polyphosphazenes (pages 1205–1214)

      Xinjian Cheng, Cheng Peng, Daohong Zhang, Shuzheng Liu, Aiqing Zhang, Hui Huang and Jiansheng Lian

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26489

      Thumbnail image of graphical abstract

      Furan rings and maleimide rings were grafted to polyphosphazens respectively, and the two types of substituted polyphosphazenes were used to prepare self-healing inorganic ruubber. The self-healing properties were carried out by thermal treatment through the D-A reactions. Compared with the traditional cross-linked rubber, these materials could be renewable and re-processable.

    19. Spotlight Article

      Synthesis of dual-functional copolymer with orthogonally photosensitive groups (pages 1215–1222)

      Lebo Xu, John Farrell, Raghuraman G. Karunakaran, Apiradee Honglawan and Shu Yang

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26490

      Thumbnail image of graphical abstract

      A dual-functional copolymer, poly(4-styrenesulfonyl azide-co-t-butyl-methacrylate), with photoacid labile and photocrosslinkable components, was synthesized. The copolymers with photoacid generators were photopatterned at 365 nm, followed by exposure to 254nm DUV to immobilize the copolymers on an organic substrate. Selective wetting was observed in the patterned regions and a ratchet-wetting pattern was formed on the gradient line pattern.

    20. Copolymerization of ethylene with 1,1-disubstituted olefins catalyzed by ansa-(fluorenyl)(cyclododecylamido)dimethyltitanium complexes (pages 1223–1229)

      Yuushou Nakayama, Yuuichi Sogo, Zhengguo Cai and Takeshi Shiono

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26491

      Thumbnail image of graphical abstract

      A series of ansa-(fluorenyl)(cyclododecylamido) complexes of titanium was synthesized. Among them, 2,7-di-tert-butylfluorenyl complex 6 was found to show excellent comonomer incorporation in the copolymerization of ethylene with isobutylene, to give alternating copolymers. Complex 6 was also found to be effective as a catalyst precursor for the copolymerization of ethylene with limonene.

    21. Convenient synthesis of cyclic carbonates from CO2 and epoxides by simple secondary and primary ammonium iodides as metal-free catalysts under mild conditions and its application to synthesis of polymer bearing cyclic carbonate moiety (pages 1230–1242)

      Naoto Aoyagi, Yoshio Furusho and Takeshi Endo

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26492

      Thumbnail image of graphical abstract

      The five-membered cyclic carbonates were obtained from CO2 and epoxides in the presence of dicyclohexylammonium iodide under mild conditions such as ordinary pressure and 25 to 45 °C. The iodides catalyzed efficiently the carbonate-forming reactions, whereas the bromide and chloride counterparts exhibited almost no catalysis. This metal-free system proceeded to give cyclic carbonate-rich polymers with high isolated yields by precipitation with water.

    22. Formation of linear and cyclic polyoxetanes in the cationic ring-opening polymerization of 3-allyloxymethyl-3-ethyloxetane and subsequent postpolymerization modification of poly(3-allyloxymethyl-3-ethyloxetane) (pages 1243–1254)

      Bjoern Schulte, Carl A. Dannenberg, Helmut Keul and Martin Möller

      Article first published online: 22 DEC 2012 | DOI: 10.1002/pola.26494

      Thumbnail image of graphical abstract

      The cationic ring-opening polymerization of 3-allyloxymethyl-3-ethyloxetane (AllylEHO) leads to the formation of allyl functional polyoxetanes under simultaneous formation of cyclic oligomers as by-products. Their formation reveals the reason why the attempts for a controlled homopolymerization of oxetanes fail. However, the high versatility of poly(AllylEHO) for postpolymerization modification is proven by click-type thiol–ene reactions with 3-mercaptopropionic acid and N-acetyl-L-cysteine methyl ester.

    23. High-performance holographic polymer-dispersed liquid crystals by incorporating hyperbranched polymers (pages 1255–1261)

      Ji Hye Park and Byung Kyu Kim

      Article first published online: 18 DEC 2012 | DOI: 10.1002/pola.26495

      Thumbnail image of graphical abstract

      The chemical incorporation of a minute amount (0.01–0.3%) of ally isocyanate functionalized hyperbranched polymer (HBP) into the polymer matrix of holographic polymer dispersed liquid crystals reduced the compound viscosity to about 1/3 of the HBP free and augmented the diffraction efficiency by threefold at low concentrations (0.01–0.05%). However, at high concentrations (0.10, 0.30%) HBP augmented the compound viscosity and reduced the grating formation kinetics and LC-polymer phase separation.

SEARCH

SEARCH BY CITATION