Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 53 Issue 12

15 June 2015

Volume 53, Issue 12

Pages i–iv, 1413–1532

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Articles
    1. You have free access to this content
      Cover Image, Volume 53, Issue 12 (pages i–ii)

      Article first published online: 24 APR 2015 | DOI: 10.1002/pola.27664

      Thumbnail image of graphical abstract

      A series of well-defined diblock copolymers containing polyethylene oxide/poly(dimethylsiloxane) are successfully incorporated in the selective layer of a thin-film composite membrane system, as reported on page 1500 (DOI: 10.1002/pola.27628), by Joel M. P. Scofield, Paul A. Gurr, Jinguk Kim, Qiang Fu, Andri Halim, Sandra E. Kentish, and Greg G. Qiao. The incorporation of the polyethylene oxide block provides improved compatibility with the membrane matrix and the more permeable poly(dimethylsiloxane) component. These additives result in the formation of membranes with improved performance, showing gas fluxes up to 250 % of the base layer flux, while maintaining selectivity. The impact of additive polymer composition and molecular weight on membrane performance has also been demonstrated.

    2. You have free access to this content
      Cover Image, Volume 53, Issue 12 (pages iii–iv)

      Article first published online: 24 APR 2015 | DOI: 10.1002/pola.27665

      Thumbnail image of graphical abstract

      On page 1523 (DOI: 10.1002/pola.27629), Garret M. Miyake, Yuetao Zhang, and Eugene Y.-X. Chen examine the stereochemical control in addition polymerization of MLA (exo-methylene-lactide), a chiral monomer derived from L-lactide, and its polymerizability towards ring-opening polymerization.

  2. Articles

    1. Top of page
    2. Cover Image
    3. Articles
    1. Spotlight Article

      Polymer coating of graphene oxide via reversible addition–fragmentation chain transfer mediated emulsion polymerization (pages 1413–1421)

      Vien T. Huynh, Duc Nguyen, Christopher H. Such and Brian S. Hawkett

      Article first published online: 21 MAR 2015 | DOI: 10.1002/pola.27596

      Thumbnail image of graphical abstract

      This work describes a versatile method to encapsulate graphene oxide (GO) with polymers using RAFT mediated emulsion polymerization. TEM, SEM, FTIR, and AFM were used to confirm the presence of the polymer layer on the surface of the GO. The thickness of the polymer coating can be adjusted by controlling the amount of monomer fed into the system. Partial polymer coatings of the GO could be achieved by varying the amount of poly(allylamine hydrochloride).

    2. RAFT radical copolymerization of beta-pinene with maleic anhydride and aggregation behaviors of their copolymer in aqueous solution (pages 1422–1429)

      Yi Wang, Qianxiang Ai and Jiang Lu

      Article first published online: 23 MAR 2015 | DOI: 10.1002/pola.27601

      Thumbnail image of graphical abstract

      A novel block copolymer poly(beta-pinene-alt-maleic anhydride)-b-polystyrene was synthesized based on the living/controlled radical alternating copolymerization. By hydrolyzing this block copolymer, a pH-sensitive amphiphilic block copolymer poly(beta-pinene-alt-maleic acid)-b-polystyrene was formed, and self-assembled into nano-micelles in aqueous solution with different morphology determined by the pH value.

    3. Reversible addition-fragmentation chain transfer polymerization of vinyl acetate under high pressure (pages 1430–1436)

      Jing Chen, Xiaoning Zhao, Lifen Zhang, Zhenping Cheng and Xiulin Zhu

      Article first published online: 5 MAR 2015 | DOI: 10.1002/pola.27582

      Thumbnail image of graphical abstract

      Well-defined PVAc with high molecular weight and narrow molecular weight distribution can be obtained relatively fast by using RAFT polymerization at 5 kbar.

    4. Spotlight Article

      Syntheses of biphenyl-terminated polyhedral oligomeric octasilicate-core dendrimers and their single-component optical transparent free-standing thermoplastic films (pages 1437–1443)

      Yasuyuki Irie and Kensuke Naka

      Article first published online: 16 MAR 2015 | DOI: 10.1002/pola.27583

      Thumbnail image of graphical abstract

      2-Biphenylethyl and 2-biphenylhexyl-terminated polyhedral oligomeric octasilicate (OS)-core polyester-typed dendrimers, denoted as OS-C2-BP and OS-C6-BP, respectively, were prepared and their bulk properties were studied. OS-C2-BP formed a transparent film, whereas OS-C6-BP formed an opaque whitish waxy film. The coating film of OS-C2-BP was easily peeled off from a substrate and formed a free-standing film. The results of X-ray diffraction (XRD) and differential scanning calorimeter (DSC) suggest that the film of OS-C2-BP was amorphous, whereas the film of OS-C6-BP contained a crystalline domain.

    5. Screening of metal catalysts influence on the synthesis, structure, properties, and biodegradation of PLA-PBA triblock copolymers obtained in melt (pages 1444–1456)

      Anna Kundys, Andrzej Plichta, Zbigniew Florjańczyk, Anita Frydrych and Konrad Żurawski

      Article first published online: 4 MAR 2015 | DOI: 10.1002/pola.27576

      Thumbnail image of graphical abstract

      Triblock copolymers comprising poly(1,4-butylene adipate) segment and polylactidearmswere obtained under technological conditions. Acetylacetonates of Li, Mg, Ca, Zn, Fe, and Zr were used as catalysts. The macroinitiator is incorporated into the major products; however, linear and cyclic homopolymers and copolymers are present. The efficiency of side reactions, including racemization of polylactide, depends on the catalyst used. The copolymers studied undergo faster biodegradation than polylactide and they can decompose in compost within 16 weeks.

    6. Investigation of Suzuki–Miyaura catalyst-transfer polycondensation of AB-type fluorene monomer using coordination-saturated aryl Pd(II) halide complexes as initiators (pages 1457–1463)

      Zilong Zhang, Pan Hu, Xiao Li, Hongmei Zhan and Yanxiang Cheng

      Article first published online: 27 FEB 2015 | DOI: 10.1002/pola.27577

      Thumbnail image of graphical abstract

      Stable aryl Pd(II) halide complexes with auxiliary ligands PCy3 and P(o-tol)3 were successfully synthesized by direct oxidative addition of aryl halide to the corresponding Pd(0) precursors and achieved the catalyst-transfer polymerization to afford the well-defined polymers with triarylamine/H end groups. The complex with P(o-tol)3 has higher activity in the process of Suzuki–Miyaura catalyst-transfer polycondensation, which is comparable with the classical Pd(II) initiator ligated by P(tBu)3.

    7. Suppressing the long-chain branching in the synthesis of poly(styrene-b-butyl acrylate-b-styrene) in RAFT emulsion polymerization by tuning the interfacial properties (pages 1464–1473)

      Yunlong Guo, Xiang Gao and Yingwu Luo

      Article first published online: 27 FEB 2015 | DOI: 10.1002/pola.27578

      Thumbnail image of graphical abstract

      In the synthesis of polystyrene-b-poly(n-butyl acrylate)-b-polystyrene triblock copolymer via reversible addition-fragmentation chain transfer emulsion polymerization, PDI is broadened by the formation of long-chain branches (LCBs) during the formation of the third block. Decreasing the interfacial transport resistance suppresses LCB formation, narrowing PDI.

    8. Imino(phenoxide) compounds of magnesium: Synthesis, structural characterization, and polymerization studies (pages 1474–1491)

      Swarup Ghosh, Debashis Chakraborty and Venkatachalam Ramkumar

      Article first published online: 5 MAR 2015 | DOI: 10.1002/pola.27579

      Thumbnail image of graphical abstract

      The first example of a monomeric magnesium catalyst systemfor the copolymerization of styrene dioxide and CO2is reported. All the catalysts also show good catalytic activity toward the copolymerization of CO2 with cyclohexene oxide and styrene oxide. The overall process is green and eco-friendly since magnesium is biocompatible and these polymers are biodegradable.

    9. Minimization of the auxiliary reagent loading for direct arylation polymerization (DArP) of 2-bromo-3-hexylthiophene (pages 1492–1499)

      Andrey E. Rudenko, Alia A. Latif and Barry C. Thompson

      Article first published online: 21 MAR 2015 | DOI: 10.1002/pola.27581

      Thumbnail image of graphical abstract

      The necessary loading of auxiliary reagents for direct arylation polymerization (DArP) is successfully minimized to use only 313 ppm loading of palladium acetate (the lowest catalyst loading reported so far for the synthesis of conjugated polymers via DArP) and 3.75% of neodecanoic acid while producing poly(3-hexylthiophene) with high molecular weight and in high yield. Examination of polymer chemical structure confirms increased regioregularity and the absence of branching defects, which translate into attractive polymer properties.

    10. High-performance thin film composite membranes with well-defined poly(dimethylsiloxane)-b-poly(ethylene glycol) copolymer additives for CO2 separation (pages 1500–1511)

      Joel M. P. Scofield, Paul A. Gurr, Jinguk Kim, Qiang Fu, Andri Halim, Sandra E. Kentish and Greg G. Qiao

      Article first published online: 3 APR 2015 | DOI: 10.1002/pola.27628

      Thumbnail image of graphical abstract

      A series of well-defined diblock copolymers containing polyethylene oxide and poly(dimethylsiloxane) are produced for use as an additive in the selective layer of thin-film composite polymeric membranes. These polymers show the successful formation of membranes with improved performance which can be controlled by polymer composition and molecular weight. Membranes formed showed fluxes up to 250% of the flux of the base selective layer material.

    11. Dispersion of silica nanoparticles bearing perfluorohexyl units into fluorinated copolymers (pages 1512–1522)

      Nelly Durand, Jean-Pierre Habas, Bernard Boutevin and Bruno Améduri

      Article first published online: 5 MAR 2015 | DOI: 10.1002/pola.27586

      Thumbnail image of graphical abstract

      The modification of silica nanoparticles by radical addition of C6F13I and C6F13-C2H4-SH led to various fluorinated silica of surface hydrophobies 143° and 124°. The dispersion of these fillers into molten poly(VDF-co-HFP) and poly(TFE-co-HFP) matrices, as well as the hydrophobic, mechanical, and thermal properties of both fluorinated copolymers and the resulting composites, were studied.

    12. Spotlight Article

      Polymerizability of Exo-methylene-lactide toward vinyl addition and ring opening (pages 1523–1532)

      Garret M. Miyake, Yuetao Zhang and Eugene Y.-X. Chen

      Article first published online: 2 APR 2015 | DOI: 10.1002/pola.27629

      Thumbnail image of graphical abstract

      This study examines the stereochemical control in addition polymerization of MLA (exo-methylene-lactide), a chiral monomer derived from l-lactide, and its polymerizability toward ring-opening polymerization.

SEARCH

SEARCH BY CITATION