Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 54 Issue 17

1 September 2016

Volume 54, Issue 17

Pages i–ii, 2641–2825

  1. Cover Image

    1. Top of page
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    3. Issue Information - Cover Description
    4. Issue Information - Editorial Board
    5. Issue Information - Table of Contents
    6. Rapid Communication
    7. Articles
    1. Cover Image, Volume 54, Issue 17 (pages i–ii)

      Version of Record online: 19 JUL 2016 | DOI: 10.1002/pola.28214

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      Cyclic olefin copolymers (COCs) are promising amorphous materials with high transparency, humidity-, and thermal-resistance. Certain COCs are used as ultra-pure (applicable to advanced pharma packaging, food contact films), crystal-clear (glass clear, amorphous), high barrier (resistant to moisture, alcohols, acids) materials. On page 2662 (DOI: 10.1002/pola.28144), W. Apisuk, H. Ito, and K. Nomura have achieved an efficient synthesis of ethylene copolymers with tetracyclododecene (TCD), with remarkable catalytic activities and efficient TCD incorporation, by using ketimide-modified half-titanocene catalyst. Synthesis of COCs with high glass transition temperature has thus been attained in this catalysis.

  2. Issue Information - Cover Description

    1. Top of page
    2. Cover Image
    3. Issue Information - Cover Description
    4. Issue Information - Editorial Board
    5. Issue Information - Table of Contents
    6. Rapid Communication
    7. Articles
  3. Issue Information - Editorial Board

    1. Top of page
    2. Cover Image
    3. Issue Information - Cover Description
    4. Issue Information - Editorial Board
    5. Issue Information - Table of Contents
    6. Rapid Communication
    7. Articles
  4. Issue Information - Table of Contents

    1. Top of page
    2. Cover Image
    3. Issue Information - Cover Description
    4. Issue Information - Editorial Board
    5. Issue Information - Table of Contents
    6. Rapid Communication
    7. Articles
  5. Rapid Communication

    1. Top of page
    2. Cover Image
    3. Issue Information - Cover Description
    4. Issue Information - Editorial Board
    5. Issue Information - Table of Contents
    6. Rapid Communication
    7. Articles
    1. You have free access to this content
      Injectable thiol-epoxy “click” hydrogels (pages 2651–2655)

      Lilong Gao, Xiaojun Li, Ying Wang, Weipu Zhu, Zhiquan Shen and Xiaodong Li

      Version of Record online: 17 MAY 2016 | DOI: 10.1002/pola.28156

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      A novel crosslinking strategy for injectable “click” hydrogels is reported. Precursors containing thiol or epoxy groups are facilely synthesized by polycondensation and radical polymerization respectively, which are used to in situ form hydrogels under physiological conditions within tens of seconds via thiol-epoxy reaction. The suitable gelation time and low cytotoxicity of this kind of hydrogels make it a potential candidate as implanted material for biomedical applications.

    2. Spotlight Article

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      Biphasic synthesis of “block” copolymers and star-shaped polymers via monomer-selective cationic copolymerization in organic/fluorinated solvents (pages 2656–2661)

      Mayuka Yamada, Tsuyoshi Nishikawa, Arihiro Kanazawa, Shokyoku Kanaoka and Sadahito Aoshima

      Version of Record online: 24 MAY 2016 | DOI: 10.1002/pola.28161

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      This article demonstrates the biphasic synthesis of “block” copolymers and star-shaped polymers via monomer-selective cationic copolymerization in the biphasic system of organic/fluorinated solvents. The first monomer and second monomer were dissolved in hexane (upper phase) and dichloropentafluoropropane (lower phase), respectively. The first monomer was polymerized in the upper phase, while the comonomer still remained unreacted in the lower phase. At the point of almost complete consumption of the first monomer, two phases were stirred vigorously to become a single copolymer with low polydispersity. Monomer-selective reaction was achieved even from a combination of monomers with similar reactivities. Moreover, an efficient one-shot formation of star-shaped polymers was feasible through the copolymerization of monomer and divinyl compound in the biphasic system.

  6. Articles

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    3. Issue Information - Cover Description
    4. Issue Information - Editorial Board
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    6. Rapid Communication
    7. Articles
    1. Efficient synthesis of cyclic olefin copolymers with high glass transition temperatures by ethylene copolymerization with tetracyclododecene using (tert-BuC5H4)TiCl2(N=CtBu2)—MAO catalyst (pages 2662–2667)

      Wannida Apisuk, Hikaru Ito and Kotohiro Nomura

      Version of Record online: 10 JUN 2016 | DOI: 10.1002/pola.28144

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      (tert-BuC5H4)TiCl2(N=CtBu2) exhibited both remarkable catalytic activities and efficient tetracyclododecene (TCD) incorporation in ethylene copolymerization. Synthesis of cyclic olefin copolymers with high glass transition temperature has thus been attained.

    2. New benzodithiophene- and benzooxadiazole/benzothiadiazole-based donor–acceptor π-conjugated polymers for organic photovoltaics (pages 2668–2679)

      Kakaraparthi Kranthiraja, Kumarasamy Gunasekar, Sang Ho Park, In-Nam Kang, Jin Yong Lee, Myungkwan Song and Sung-Ho Jin

      Version of Record online: 24 MAY 2016 | DOI: 10.1002/pola.28145

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      New series of donor–acceptor type 2D-conjugated polymers (P1–P4) were designed and synthesized where A1, A2 (oxygen analogues), A3, A4 (sulfur analogues) were used as an electron deficient co-monomers. The systematic investigation of P1–P4 with additive and solvent treatment, yielded in enhanced power conversion efficiency of 4.29% for P3-based devices in bulk heterojunction organic solar cells.

    3. Imidazole-type thermal latent curing agents with high miscibility for one-component epoxy thermosetting resins (pages 2680–2688)

      Kenji Kudo, Sawako Fuse, Masahiro Furutani and Koji Arimitsu

      Version of Record online: 20 MAY 2016 | DOI: 10.1002/pola.28146

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      A liquid-type thermal latent curing agent 1 has been developed, which generates an imidazole with a thermal trigger via a retro-Michael addition reaction. The latent curing agent 1 has superior miscibility toward epoxy resins; in addition, it is confirmed that the epoxy resin composition has both high reactivity at 150 °C, and long-term storage stability at room temperature.

    4. Hydrophilic PET surfaces by aminolysis and glycopolymer brushes chemistry (pages 2689–2697)

      Bénédicte Lepoittevin, Ludovic Costa, Sylvain Pardoue, Diana Dragoé, Sandra Mazerat and Philippe Roger

      Version of Record online: 17 MAY 2016 | DOI: 10.1002/pola.28148

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      Hydrophilic PET surfaces were obtained by combination of aminolysis reaction and grafting from polymerization. First, ester groups of PET films were reacted with amino groups of polyethylenimine by aminolysis reaction. After grafting of ATRP initiator, polymerization of 2-lactobionamidoethyl methacrylate was achieved. According to the molar mass of grafted polymer, hydrophilic to superhydrophilic surfaces could be obtained.

    5. Polyurea microcapsules from isocyanatoethyl methacrylate copolymers (pages 2698–2705)

      Nuttapol Risangud, Thomas R. Congdon, Daniel J. Keddie, Paul Wilson, Kristian Kempe and David M. Haddleton

      Version of Record online: 17 MAY 2016 | DOI: 10.1002/pola.28149

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      Poly(benzyl methacrylate-co-isocyanatoethyl methacrylate) (p(BnMA-co-IEM)) copolymers which are sufficiently stable toward hydrolysis were synthesized by Cu(0)-mediated radical polymerization. The isocyanate side groups were exploited for postpolymerization modifications with different model amine compounds and for the fabrication of liquid core microcapsules via oil-in-water interfacial polymerization.

    6. Magnetically polymeric nanocarriers for targeting delivery of curcumin and hyperthermia treatments toward cancer cells (pages 2706–2713)

      Chih-Yu Kuo, Ting-Yu Liu, Andri Hardiansyah and Wen-Yen Chiu

      Version of Record online: 9 MAY 2016 | DOI: 10.1002/pola.28150

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      An intelligent (thermo- and magnetic- sensitive) polymeric nanocarrier with efficient encapsulation of hydrophobic anti-cancer drugs (curcumin) for targeting, therapeutic treatments to cancer cells.

    7. Poly(aryl ether ketone) composite membrane as a high-performance lithium-ion batteries separator (pages 2714–2721)

      Min Xie, Mingying Yin, Guangdi Nie, Jun Wang, Ce Wang, Danming Chao and Xincai Liu

      Version of Record online: 17 MAY 2016 | DOI: 10.1002/pola.28153

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      This study reports the preparation of composite membrane, which shows desirable porosity, thermal shrinkage, electrolyte uptake capacity, and wettability. The assembled lithium-ion cell using the prepared composite separator exhibits hopeful cell performance.

    8. Dual roles for promoting monomers to polymers: A conjugated sulfonium salt photoacid generator as photoinitiator and photosensitizer in cationic photopolymerization (pages 2722–2730)

      Ming Jin, Xingyu Wu, Jean Pierre Malval, Decheng Wan and Hongting Pu

      Version of Record online: 17 MAY 2016 | DOI: 10.1002/pola.28154

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      The reported conjugated sulfonium salt generated H+ can be used as photoinitiator. Moreover, the fluorescent byproducts from photodecomposition can be used as photosensitizer of commercial iodonium salt in the photoinitiating systems of cationic photopolymerization of epoxides and vinyl ether upon exposure to near-UV and visible light-emitting diodes. A strategy for comprehensive utilization of the conjugated sulfonium salt photoacid generator was developed efficiently.

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      On the miniemulsion polymerization of very hydrophobic monomers initiated by a completely water-insoluble initiator: thermodynamics, kinetics, and mechanism (pages 2731–2745)

      Tom G. T. Jansen, Jan Meuldijk, Peter A. Lovell and Alex M. van Herk

      Version of Record online: 24 MAY 2016 | DOI: 10.1002/pola.28155

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      The successful polymerization in miniemulsion of very hydrophobic monomers by a very hydrophobic initiator contradicts with current theories on radical origin and mobility. The introduction of an interfacial chain transfer event permits the presence of single radicals in miniemulsion particles. The low initiator efficiency of the monomer-soluble initiator affects the polymerization rates, resulting in a one to one copy (with respect to particle size) of monomer droplets into polymer particles.

    10. Control of vertical distribution of thiophene-based copolymers containing 4,7-Dithien-2-yl-benzo[C][1,2,5]thiadiazole and 3,6-Dithien-2-yl-pyrrolo[3,4-C]pyrrole-1,4(2H,5H)-dione as Side Groups for Photovoltaics (pages 2746–2759)

      Min-Hee Choi, Tae Ho Lee, Yong Woon Han and Doo Kyung Moon

      Version of Record online: 9 JUN 2016 | DOI: 10.1002/pola.28157

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      Control of vertical distribution of thiophene-based copolymers containing 4,7-dithien-2-yl-benzo[c][1,2,5]thiadiazole and 3,6-dithien-2-yl-pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione as side groups for photovoltaics. Four new D−A type copolymers with 2D-conjugated side-chain, containing two different acceptors linked by thiophene donors, were designed and synthesized using Stille-coupling reaction. According to the acceptor unit, the vertical distributions of polymer and PC70BM within the BHJ were changed.

    11. Polyisobutylene-based polyurethanes X: PU nanocomposites with s-containing soft segments (pages 2760–2765)

      Nihan Nugay, Kalman Toth, Nur Cicek Kekec, Turgut Nugay and Joseph P. Kennedy

      Version of Record online: 20 MAY 2016 | DOI: 10.1002/pola.28158

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      This study demonstrates that incorporation of 0.5 wt % OmMMT (organically modified montmorillonite, i.e., defoliated montmorillonite nanolayers carrying N+(CH3)3CH2CH2CH2-NH2 modifying molecules) into PIBs-PU (PIB-based PU whose soft segments are of HOCH2CH2-S-PIB-S-CH2CH2OH) significantly enhances the static and dynamic mechanical properties, as well as the hydrolytic-oxidative stability of this new thermoplastic elastomer. The beneficial effect of OmMMT is likely due to its function as co-chain extender/reinforcing filler.

    12. Spotlight Article

      End-group functionalization and postpolymerization modification of helical poly(isocyanide)s (pages 2766–2773)

      Anna Croom, Rossella Tarallo and Marcus Weck

      Version of Record online: 25 MAY 2016 | DOI: 10.1002/pola.28159

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      A functional Nickel initiator is used to install a terminal alkyne group on poly(isocyanide)s during polymerization. CuAAC reactions with various functional azides are performed as a post-polymerization method for end-group functionalization. The resultant polymers are analyzed by various techniques to demonstrate successful ligation of each respective azide.

    13. Conjugated polymers with carbazole, fluorene, and ethylene dioxythiophene in the main chain and a pendant cyano group: Synthesis, photophysical, and electrochemical studies (pages 2774–2784)

      Vivek Anand, Elumalai Ramachandran and Raghavachari Dhamodharan

      Version of Record online: 24 MAY 2016 | DOI: 10.1002/pola.28160

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      Six new conjugated polymers are synthesized via Sonogashira coupling reaction. The band gap of these polymers is in the range 2.35–2.43 eV. They appear to be better hole-transporting materials by virtue of their low oxidation potential peaks. Molecular aggregation and enhanced emission is observed on the addition of water, a nonsolvent, to the polymer solution in THF. The polymers emit in the green region with a quantum yield of Φf = 41–43%.

    14. Effect of supercritical CO2 on the copolymerization behavior of cyclohexene oxide/CO2 and copolymer properties with DMC/Salen-Co(III) catalyst system (pages 2785–2793)

      Qing-Yang Meng, Katie Pepper, Rui-Hua Cheng, Steven M. Howdle and Bo-Ping Liu

      Version of Record online: 6 JUN 2016 | DOI: 10.1002/pola.28162

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      ScCO2 dramatically facilitates CO2/CHO copolymerization, especially in reaction efficiency, selectivity to carbonate linkages and Tg of obtained PCHC. The phase changes of PCHC under different scCO2 conditions illustrate that Tg and viscosity decrease at higher supercritical pressure. Thermally stable and high molecular weight copolymers are successfully obtained. Tg shows a strong correlation with the carbonate linkage content of obtained PCHC chains. ScCO2 is found to remove the residual catalyst in an environmentally friendly way.

    15. Spotlight Article

      Exploring amino acid-tethered polymethacrylates as CO2-sensitive macromolecules: A concealed property (pages 2794–2803)

      Kamal Bauri, Abhishek Pan, Ujjal Haldar, Amal Narayanan and Priyadarsi De

      Version of Record online: 31 MAY 2016 | DOI: 10.1002/pola.28165

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      The present study unveils the novel CO2-responsive characteristic of side-chain alanine, leucine, and isoleucine tethered polymethacrylate. The leucine based CO2-philic polymer has been further chain extended with a thermoresponsive motif to provide dual thermo and gas-tunable flip-flop micelle.

    16. Synthesis and characterization of a new phenanthrenequinoxaline-based polymer for organic solar cells (pages 2804–2810)

      Eunsol Jo, Jong Baek Park, Woo-Hyung Lee, Ji-Hoon Kim, In Hwan Jung, Do-Hoon Hwang and In-Nam Kang

      Version of Record online: 24 MAY 2016 | DOI: 10.1002/pola.28166

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      Synthesis and characterization of a new phenanthrenequinoxaline(phQx)-based donor–acceptor polymer was described. The incorporation of four branched alkoxy side chains into the two fused phenyl rings of the phQx unit improves its solubility. The addition of highly planar phQx groups to the polymer was expected to broaden the absorption band and enhance the carrier mobility, and thus to improve its solar cell performances.

    17. Synthesis of novel tri-benzoxazine and effect of phenolic nucleophiles on its ring-opening polymerization (pages 2811–2819)

      Sini Nalakathu Kolanadiyil, Motohisa Azechi and Takeshi Endo

      Version of Record online: 18 JUN 2016 | DOI: 10.1002/pola.28167

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      The influence of various phenolic nucleophiles on ring-opening polymerization of a trifunctional benzoxazine monomer (T-Bz) was studied and a complete ring-opening of tri-oxazine was observed in the presence of phenolic nucleophiles such as MR, hydroquinone, pyrogallol, and 2,7-dihydroxy naphthalene at a very low temperature. The obtained networked polybenzoxazines showed a high thermal stability with Td20 of 350–465 °C and char yield of 67–78% at 500 °C.

    18. Spotlight Article

      Post-polymerization modification of branched polyglycidol with N-Hydroxy phthalimide to give ratio-controlled amino-oxy functionalized species (pages 2820–2825)

      Dain B. Beezer and Eva Harth

      Version of Record online: 29 MAY 2016 | DOI: 10.1002/pola.28168

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      Amino-oxy polyglycidol derivatives with a tailored degree of functionalization were prepared as building blocks for the application in biomaterials such as bioconjugates and hydrogels. Utilizing optimized Mitsunobu conditions, functionalization degrees of 17%, 33%, 43%, and 63% of the hydroxyl groups will enable more diverse polymeric networks that lacked so far tools to vary network dimensions by keeping hydrophilic characteristics.

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