Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 53 Issue 9

1 May 2015

Volume 53, Issue 9

Pages i–iv, 1061–1170

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Rapid Communication
    4. Articles
    5. Erratum
    1. You have free access to this content
      Cover Image, Volume 53, Issue 9 (pages i–ii)

      Article first published online: 23 MAR 2015 | DOI: 10.1002/pola.27633

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      Novel conjugated polymers composed of benzo[1,2-b:4,5-b′]dithiophene donor and thieno[3,4-b]pyrazine or dithieno[3′,2′:3,4;2″,3″:5,6]benzo[1,2-d]imidazole acceptor units are designed and synthesized, as presented by the international collaboration of Mukhamed L. Keshtov, Tomoya Higashihara, and Tsuyoshi Michinobu et al. on page 1067 (DOI: 10.1002/pola.27570). The D-A type polymers show a longer wavelength absorption reaching into nearinfrared. Bulk-heterojunction organic solar cells using these polymers as p-type semiconductors and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) as an n-type semiconductor demonstrate the potent photoconversion.

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      Cover Image, Volume 53, Issue 9 (pages iii–iv)

      Article first published online: 23 MAR 2015 | DOI: 10.1002/pola.27634

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      The cover shows a SEM image of Nile Red encapsulated nanoparticles made by a UV-degradable polymer through a conventional emulsion method. On page 1161 (DOI: 10.1002/pola.27550), Liang Ma, Ryan Baumgartner, Yanfeng Zhang, Ziyuan Song, Kaimin Cai, and Jianjun Cheng report a new UV-responsive polymer that is prepared via condensation polymerization of 2-nitrobenzyl[4-(1,2-dihydroxyethyl)phenyl]carbamate and azalaic acid dichloride. When the polymer is irradiated with UV light, the nitrobenzyl urethane protecting group is removed and the deprotected aniline undergoes spontaneous 1,6-elimination reactions, resulting in polymer degradation. Nanoparticles with encapsulated Nile Red are formulated with the degradable polymer and triggered burst release of Nile Red is observed when the nanoparticles are irradiated by UV light.

  2. Rapid Communication

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

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      “Metallophilic crosslinking” to provide fast-curing and mendable poly(urethane-metallothiolate) elastomers (pages 1061–1066)

      Alaitz Ruiz de Luzuriaga, Alaitz Rekondo, Roberto Martin, Germán Cabañero, Hans J. Grande and Ibon Odriozola

      Article first published online: 3 FEB 2015 | DOI: 10.1002/pola.27534

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      Thiol-functionalized liquid polyurethane is reacted with silver ions to obtain a supramolecular network stabilized by Ag–Ag metallophilic attractions.

  3. Articles

    1. Top of page
    2. Cover Image
    3. Rapid Communication
    4. Articles
    5. Erratum
    1. Synthesis and photovoltaic properties of thieno[3,4-b]pyrazine or dithieno[3′,2′:3,4;2″,3″:5,6]benzo[1,2-d]imidazole-containing conjugated polymers (pages 1067–1075)

      Mukhamed L. Keshtov, Dmitri Yu. Godovsky, Alexei R. Khokhlov, Tetsunari Mizobe, Hiroyuki Fujita, Eisuke Goto, Junya Hiyoshi, Saki Nakamura, Susumu Kawauchi, Tomoya Higashihara and Tsuyoshi Michinobu

      Article first published online: 3 MAR 2015 | DOI: 10.1002/pola.27570

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      Conjugated polymers composed of benzo[1,2-b:4,5-b′]dithiophene (BDT) and thieno[3,4-b]pyrazine or dithieno[3′,2′:3,4;2″,3″:5,6]benzo[1,2-d]imidazole units, prepared by Stille polycondensation, are applied to p-type semiconducting polymers in bulk-heterojunction solar cells. The devices based on the polymer with the thieno[3,4-b]pyrazine unit show better photovoltaic performances than those based on the polymer with the dithieno[3′,2′:3,4;2″,3″:5,6]benzo[1,2-d]imidazole unit, probably due to the extended absorption range of the former polymer.

    2. Synthesis and properties of poly(thiourethane)s having soft oligoether segments (pages 1076–1081)

      Yukiko Inoue, Kozo Matsumoto and Takeshi Endo

      Article first published online: 1 FEB 2015 | DOI: 10.1002/pola.27535

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      Poly(thiourethane)s having soft oligoether segments were effectively synthesized by the polyaddition of bis(five-membered cyclic dithiocarbonate), 2,2-bis[4-(1,3-thioxolane-2-one-4-yl-methoxy)phenyl]propane, with α,ω-diaminooligoethers. The obtained polymers showed higher thermal stability than analogous polymers prepared from usual oligomethylene diamines.

    3. Spotlight Article

      Amphiphilic thermoset elastomers from metal-free, click crosslinking of PEG-grafted silicone surfactants (pages 1082–1093)

      Talena Rambarran, Ferdinand Gonzaga, Michael A. Brook, Frances Lasowski and Heather Sheardown

      Article first published online: 7 FEB 2015 | DOI: 10.1002/pola.27539

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      Metal-free click reactions between azidoalkylsilicones, alkynyl-PDMS and alkynyl-PEGs lead readily to hydrophilic silicone elastomers. Monoalkynyl-functional PEGs were first clicked onto a fraction of the available azido groups of a functional polysiloxane backbone, yielding azido reactive PDMS-g-PEG rake surfactants. These polymers were then used to crosslink α,ω-alkynyl PDMS of different molecular weights. Using a few simple starting materials, this generic yet highly versatile method permits the preparation and characterization of a library of amphiphilic elastomers and hydrogels.

    4. Star-shaped cyclopolymers: A new category of star polymer with rigid cyclized arms prepared by controlled cationic cyclopolymerization and subsequent microgel formation of divinyl ethers (pages 1094–1102)

      Tamotsu Hashimoto, Haruki Matsui, Michio Urushisaki and Toshikazu Sakaguchi

      Article first published online: 7 FEB 2015 | DOI: 10.1002/pola.27540

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      Star-shaped cyclopoly(divinyl ether)s with rigid cyclized arms [star-poly(1)] were synthesized by living/controlled cationic cyclopolymerization of 4,4-bis(vinyloxymethyl)-cyclohexene (1) and the subsequent chain linking reactions of the formed living cyclopolymers with 1,4-bis(vinyloxy)hexane as a crosslinker. Dihydroxylation of the cyclohexene double bonds of star-poly(1) gave hydrophilic water-soluble rigid star-shaped polymers [star-poly(1)-OH] with thermo-responsive function.

    5. Formation of thermo-sensitive and cross-linkable micelles by self-assembly of poly(pentafluorophenyl acrylate)-containing block copolymer (pages 1103–1113)

      Wilaiporn Graisuwan, Hui Zhao, Suda Kiatkamjornwong, Patrick Theato and Voravee P. Hoven

      Article first published online: 7 FEB 2015 | DOI: 10.1002/pola.27541

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      Amphiphilic poly(pentafluorophenyl acrylate)-block-poly(N-isopropylacrylamide) (PPFPA-b-PNIPAM) was synthesized by RAFT polymerization. Post-polymerization modification of the copolymer by ortho-nitrobenzyl (ONB) protected diamine yielded stable, core-cross-linked micelles upon self-assembly followed by UV irradiation. The ability to uptake active molecules, namely 4-nitro-7-piperazino-2,1,3-benzoxadiazole (NBD) and pyrene within the core of the micelles by tandem post-polymerization modification of the remaining PFPA groups and physical encapsulation, respectively has been highlighted to demonstrate their potential as thermo-sensitive cargos for advanced applications.

    6. Synthesis of poly(vinyl ether)-based, ABA triblock-type thermoplastic elastomers with functionalized soft segments and their gas permeability (pages 1114–1124)

      Tamotsu Hashimoto, Tsuguto Imaeda, Satoshi Irie, Michio Urushisaki and Toshikazu Sakaguchi

      Article first published online: 7 FEB 2015 | DOI: 10.1002/pola.27542

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      The poly(vinyl ether)-based, ABA-typed triblock copolymers consisting of poly(2-adamantyl vinyl ether) as outer hard segments and poly(6-acetoxyhexyl vinyl ether), poly(6-hydroxyhexyl vinyl ether), or poly(2-(2-methoxyethoxy)ethyl vinyl ether) as inner soft segments were synthesized by sequential living cationic polymerization. Despite the presence of polar functional groups such as ester, hydroxy, and oxyethylene units in their soft segments, the block copolymers formed elastomeric films. The effect on gas permeability of the functional groups in the soft segments was investigated.

    7. Polyisobutylene containing organic/inorganic hybrid block copolymers and their crystalline behavior (pages 1125–1133)

      Ujjal Haldar, Kamal Bauri, Ren Li, Rudolf Faust and Priyadarsi De

      Article first published online: 7 FEB 2015 | DOI: 10.1002/pola.27543

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      This study reveals the synthesis of novel block copolymers comprised of flexible PIB segment and rigid POSS segment by combination of carbocationic and reversible addition-fragmentation chain transfer (RAFT) polymerizations. PIB containing organic/inorganic hybrid block copolymers are able to induce crystalline properties, which lead to significant insights for development of superior composite materials towards materials chemistry.

    8. Synthesis of ultra-small branched star poly(ε-caprolactone)s and their high end group concentration effects on crystallization (pages 1134–1142)

      Woohyuk Choi, Jae Woo Chung and Seung-Yeop Kwak

      Article first published online: 16 FEB 2015 | DOI: 10.1002/pola.27544

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      Ultra-small branched star poly(ε-caprolactone)s (SPLCs) with well-defined architectures were successfully synthesized in high purity and high yield using a pilot-scale pseudo-one-pot process via manipulating the monomer-to-core ratio, adjusting monomer-to-polymer conversion, end-capping the terminal hydroxyl groups, and vacuum purification. This synthetic protocol did not permit backbiting side reactions, enabling easy control over the molecular architectures of SPCLs, even with extremely small branches. They showed reduced crystallization and molecular weight-dependent glass transition due to the small size of the branches.

    9. Polyisobutylene-b-Poly(N,N-diethylacrylamide) well-defined amphiphilic diblock copolymer: Synthesis and thermo-responsive phase behavior (pages 1143–1150)

      Chunhong Ren, Xunwei Liu, Xue Jiang, Gang Sun and Xiaoyu Huang

      Article first published online: 7 FEB 2015 | DOI: 10.1002/pola.27545

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      This article reports the synthesis of polyisobutylene-b-poly(N,N-diethylacrylamide) well-defined amphiphilic thermo-responsive diblock copolymers via the combination of living carbocationic polymerization and RAFT polymerization.

    10. Spotlight Article

      Synthesis, physicochemical characteristics, and biocompatibility of self-assemble polymers bearing guanine, cytosine, uracil, and thymine moieties (pages 1151–1160)

      Jin Chul Kim, Mihee Kim, Jungwoon Jung, Jinseok Lee, Brian J. Ree, Heesoo Kim, Ik Jung Kim, Jung Ran Kim and Moonhor Ree

      Article first published online: 7 FEB 2015 | DOI: 10.1002/pola.27546

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      Chemically well-defined brush polymers bearing guanine, cytosine, uracil, or thymine moieties at the bristle ends were synthesized. These polymers were thermally stable, and readily solution-processable, yielding high-quality films. They favorably self-assembled as molecular multibilayer structures, always providing nucleobase-rich surfaces. The multibilayer-structured polymer films showed water affinity and selective protein adsorption, suppressed bacterial adherence, facilitated cell adhesion, exhibited good biocompatibility in mice, and are suitable as biomaterials and in protein separation applications.

    11. UV-responsive degradable polymers derived from 1-(4-aminophenyl) ethane-1,2-diol (pages 1161–1168)

      Liang Ma, Ryan Baumgartner, Yanfeng Zhang, Ziyuan Song, Kaimin Cai and Jianjun Cheng

      Article first published online: 27 FEB 2015 | DOI: 10.1002/pola.27550

      Thumbnail image of graphical abstract

      A UV-responsive polymer was prepared via condensation polymerization of 2-nitrobenzyl[4-(1,2-dihydroxyethyl)phenyl]carbamate and azalaic acid dichloride. Upon exposure to UV light, the nitrobenzyl urethane protecting group was removed and the deprotected aniline underwent spontaneous 1, 6-elimination reactions, resulting in degradation of the polymer. Nile Red was encapsulated in this novel degradable polymer nanoparticle by conventional emulsion method and triggered burst release of Nile Red was observed when the nanoparticles were irradiated by UV light.

  4. Erratum

    1. Top of page
    2. Cover Image
    3. Rapid Communication
    4. Articles
    5. Erratum
    1. You have free access to this content
      Erratum: Exploring the synthesis and impact of end-functional poly(3-hexylthiophene) (pages 1169–1170)

      Nisha V. Handa, Abigail V. Serrano, Maxwell J. Robb and Craig J. Hawker

      Article first published online: 14 MAR 2015 | DOI: 10.1002/pola.27599

      This article corrects:

      Exploring the synthesis and impact of end-functional poly(3-hexylthiophene)

      Vol. 53, Issue 7, 831–841, Article first published online: 7 FEB 2015

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