Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 52 Issue 3

1 February 2014

Volume 52, Issue 3

Pages i–iv, 295–434

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Articles
    1. You have free access to this content
      Cover Image, Volume 52, Issue 3 (pages i–ii)

      Article first published online: 18 DEC 2013 | DOI: 10.1002/pola.27044

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      Snowman-like polymer–silica asymmetric particles are obtained by combination of a hydrolytic process with seeded emulsion polymerization, as presented by Feng-Wei Wang, Hua-Rong Liu, Yang Zhang, He-Wen Liu, Xue-Wu Ge, and Xing-Yuan Zhang on page 339. The amphiphilicity of the fabricated asymmetric particles can be turned by changing the feeding amount of the second monomer and the inorganic precursor. The obtained asymmetric particles could be applied as a solid surfactant to stabilize water/oil emulsions. Hierarchical microspheres or block polymers could also be obtained after polymerization of the monomer phase.

    2. You have free access to this content
      Cover Image, Volume 52, Issue 3 (pages iii–iv)

      Article first published online: 18 DEC 2013 | DOI: 10.1002/pola.27045

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      Click chemistry is used to synthesize new linear PPLG-g-Py polymers from mono-azido-functionalized pyrene and poly(Γ-propargyl-l-glutamate) oligomers, as presented by Yung-Chih Lin and Shiao-Wei Kuo on page 321. Incorporating the pyrene units as side chains enhances the α-helical conformations and also increases the temperature stability of these linear PPLG-g-Py polymers. Mixing the PPLG-g-Py oligomers with multiwalled carbon nanotubes (MWCNTs) in dimethylformamide leads to the formation of highly dispersible PPLG-g-Py/MWCNT organic/inorganic hybrid complex materials through significant π–π stacking between the PPLG-g-Py oligomers and the MWCNTs in these complexes.

  2. Articles

    1. Top of page
    2. Cover Image
    3. Articles
    1. Ordered nanostructures at two different length scales mediated by temperature: A triphenylene-containing mesogen-jacketed liquid crystalline polymer with a long spacer (pages 295–304)

      Yu-Feng Zhu, Hai-Jian Tian, Hong-Wei Wu, De-Zhao Hao, Yu Zhou, Zhihao Shen, De-Chun Zou, Ping-Chuan Sun, Xing-He Fan and Qi-Feng Zhou

      Article first published online: 21 NOV 2013 | DOI: 10.1002/pola.27003

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      PP12V containing triphenylene (Tp) moieties with 12 methylene units as spacers is synthesized, and its novel liquid crystalline phase behavior is investigated. The low-temperature phase of the polymer is a ΦH phase (a = 2.06 nm) that is self-organized by Tp discotic mesogens. A re-entrant isotropic phase is found at medium temperatures, while the high-temperature phase is a ΦN phase with a larger dimension (a′ = 4.07 nm) developed by the rod-like supramolecular mesogen.

    2. Effect of backbone structures on photovoltaic properties in naphthodithiophene-based copolymers (pages 305–312)

      Chinna Bathula, Sachin Badgujar, Chang Eun Song, In-Nam Kang, Shinuk Cho, Jong-Cheol Lee, Won Suk Shin, Sang-Jin Moon and Sang Kyu Lee

      Article first published online: 27 NOV 2013 | DOI: 10.1002/pola.27005

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      Compared to the zigzag naphthodithiophene (NDT)-based copolymer, the linear NDT-based copolymer exhibits a low bandgap, a broad absorption spectrum, and enhanced short-circuit currents, while the zigzag NDT-based copolymer shows an improved hole mobility and a lower highest occupied molecular orbital energy level, which would lead to a higher open-circuit voltage in polymer solar cells, as compared to the linear NDT-based copolymer.

    3. Facile synthesis of heat-resistant and photoluminescent poly(N-aryleneindole ether)s via catalyst-free C[BOND]N/C[BOND]O coupling reaction (pages 313–320)

      Guanjun Chang, Li Yang, Junxiao Yang, Yawen Huang, Lin Zhang and Runxiong Lin

      Article first published online: 18 NOV 2013 | DOI: 10.1002/pola.27014

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      Soluble and high-thermal stability poly(N-aryleneindole ether)s (PEINs) are synthesized by a catalyst-free nucleophilic substitution polycondensation reaction, exhibiting a promising film-forming ability, outstanding photonic luminescence properties, and electroactivity.

    4. Polypeptide/Multiwalled carbon nanotube hybrid complexes stabilized through noncovalent bonding interactions (pages 321–329)

      Yung-Chih Lin and Shiao-Wei Kuo

      Article first published online: 18 NOV 2013 | DOI: 10.1002/pola.27000

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      Click chemistry is used to synthesize new linear polypeptide-g-pyrene polymers from a mono-azido-functionalized pyrene derivative (N3-Py) and several poly(γ-propargyl-l-glutamate) (PPLG) oligomers. Incorporating the pyrene units as side chains enhances the α-helical conformations of these PPLG oligomers in the solid state and increases the temperature stability of the α-helical secondary structures of the grafted PPLG oligomers, relative to those of the pure PPLG species.

    5. Cyclopolymerization of α,ω-heterodifunctional monomers containing styrene and maleimide moieties (pages 330–338)

      Lei Zou, Jian'an Liu, Ke Zhang, Yongming Chen and Fu Xi

      Article first published online: 15 NOV 2013 | DOI: 10.1002/pola.27004

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      The cyclopolymerizations of α,ω-heterodifunctional monomers with styrene and maleimide moieties bridged by oligo-ethylene glycol linkers can be realized in low monomer feeding concentrations. The cyclopolymerizations of monomers with six or seven ethylene glycol units in high concentrations could be enhanced by the supramolecular effects between the linkers and the potassium metal ion, both of which afford well-defined cyclopolymers with crown ether encircled in their main chains.

    6. Synthesis of snowman-like polymer-silica asymmetric particles by combination of hydrolytic condensation process with γ-ray radiation initiated seeded emulsion polymerization (pages 339–348)

      Feng-Wei Wang, Hua-Rong Liu, Yang Zhang, He-Wen Liu, Xue-Wu Ge and Xing-Yuan Zhang

      Article first published online: 22 NOV 2013 | DOI: 10.1002/pola.27006

      Thumbnail image of graphical abstract

      Snowman-like polymer-silica asymmetric particles are obtained by a combination of hydrolytic processes with seeded emulsion polymerization. The amphiphilicity of the fabricated asymmetric particles can be turned by changing the feeding amount of the second monomer and inorganic precursor. The obtained asymmetric particles can be applied as a solid surfactant to stabilize water-in-oil emulsions. Hierarchical microspheres or block polymers can be obtained after polymerization of the monomer phase.

    7. Synthesis and properties of cross-linkable high molecular weight fluorinated copolyimides (pages 349–359)

      Hongyan Yao, Yunhe Zhang, Yu Liu, Kaiyuan You, Shanyou Liu, Baijun Liu and Shaowei Guan

      Article first published online: 17 NOV 2013 | DOI: 10.1002/pola.27007

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      Novel cross-linkable high molecular weight fluorinated copolyimides are synthesized. The copolyimides exhibit excellent solubility, high tensile properties, and good optical transparency. The copolyimides can cross-link thoroughly after curing at 260 °C under a vacuum. The cured copolyimides have excellent chemical resistance and high thermal properties. The obtained cured films have a low dielectric constant and excellent surface planarity.

    8. Spotlight Article

      Synthesis of well-defined, soluble poly(3-alkyl-4-benzamide) by chain-growth condensation polymerization (pages 360–365)

      Yoshihiro Ohta, Makoto Karasawa, Tetsurou Niiyama, Akihiro Yokoyama and Tsutomu Yokozawa

      Article first published online: 21 NOV 2013 | DOI: 10.1002/pola.27008

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      Well-defined poly(3-octyl-4-benzamide) is synthesized by chain-growth condensation polymerization of phenyl 3-octyl-4-(4-octyloxybenzyl(OOB)amino)benzoate with an initiator, followed by removal of OOB groups from amide nitrogen with sulfuric acid. Poly(3-alkyl-4-benzamide) is markedly more soluble than poly(p-benzamide) in polar organic solvents.

    9. Preparation of amphiphilic copolymers for covalent loading of paclitaxel for drug delivery system (pages 366–374)

      Wulian Chen, Jin Z. Zhang, Jianhua Hu, Qisang Guo and Dong Yang

      Article first published online: 18 NOV 2013 | DOI: 10.1002/pola.27009

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      The azide-functional diblock copolymer PEG-b-P(OEGEEMA-co-AzPMA) is synthesized, and alkyne-functional paclitaxel is conjugated to it, using click chemistry. The novel paclitaxel–polymer conjugate self-assembles into micellar nanoparticles in aqueous solution, and the loading content of paclitaxel is easily tuned by the feeding ratio.

    10. Carbonyldiimidazole-accelerated efficient cure of epoxidized soybean oil with dicyandiamide (pages 375–382)

      Chun Hua Zhao, Shun Jiang Wan, Lu Wang, Xiang Dong Liu and Takeshi Endo

      Article first published online: 15 NOV 2013 | DOI: 10.1002/pola.27010

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      Dicyandiamide (DICY) with carbonyldiimidazole as the accelerator can rapidly cure epoxidized soybean oil (ESO) within 13 min at 190 °C. The stoichiometric curing molar ratio is three ESO epoxy units per one DICY molecule, and two internal epoxides give secondary alcohols, while one links to the nitrile group.

    11. Spotlight Article

      Effect of ammonium groups on the properties and alkaline stability of poly(arylene ether)-based anion exchange membranes (pages 383–389)

      Junpei Miyake, Keita Fukasawa, Masahiro Watanabe and Kenji Miyatake

      Article first published online: 15 NOV 2013 | DOI: 10.1002/pola.27011

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      Five kinds of ammonium groups (TMA, BDMA, MIm, DMIm, and PYR)-modified partially fluorinated poly(arylene ether) block copolymer membranes are synthesized to elucidate properties that include water uptake, hydroxide ion conductivity, stabilities in aqueous alkaline, and hydrazine media for anion exchange membrane fuel cell applications. The PYR-QPE membrane shows the highest alkaline and hydrazine stability in terms of the conductivity, water uptake, and dry weight.

    12. Phosphinated phenols from acid-fragmentation of bisphenols and their unsymmetrical diamine derivatives for copolyimides (pages 390–400)

      Ching Hsuan Lin, Chin Kuang Hsu, Meng Wei Wang, Shenghong A. Dai and Tzong Yuan Juang

      Article first published online: 22 NOV 2013 | DOI: 10.1002/pola.27012

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      Phosphinated phenols from acid-fragmentation of bisphenols are reported. Based on the phosphinated phenols, unsymmetrical diamines and their copolyimide are prepared, and the structure–properties relationship is discussed.

    13. Synthesis and optoelectronic properties of conjugated polymers based on a dithienobenzimidazole unit in the main chain (pages 401–409)

      Koji Takagi, Masanori Sakaida, Kazuma Kusafuka and Takuya Miwa

      Article first published online: 17 NOV 2013 | DOI: 10.1002/pola.27013

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      The synthesis and optoelectronic characterization of conjugated polymers consisting of a dithienobenzimidazole unit are investigated using UV-visible/fluorescence spectra and the cyclic voltammetry in conjunction with the frontier molecular orbital calculation of model compounds. Optoelectronic properties of conjugated polymers are influenced by the structure of the fused-ring system and the alternating building block, and they can be modified by the transformation into the cationic dithienobenzimidazolium unit.

    14. Functional 1,3-benzoxazine bearing 4-pyridyl group: Synthesis and thermally induced polymerization behavior (pages 410–416)

      Asei William Kawaguchi, Atsushi Sudo and Takeshi Endo

      Article first published online: 22 NOV 2013 | DOI: 10.1002/pola.27015

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      A novel 1,3-benzoxazine 1 with 4-aminopyridyl moiety is synthesized from 4-aminopyridine, p-cresol, and paraformaldehyde. 1 undergoes the thermally induced ring-opening polymerization at 180 °C to afford the corresponding polymer composed of two types of repeating units, that is, Mannich-type one (–phenol–CH2–NR–CH2–) and a typical phenolic resin-type one (–phenol–CH2–phenol–). The polymer possesses a benzoxazine moiety at the chain end.

    15. Spotlight Article

      Vinyl-triazolium monomers: Versatile and new class of radically polymerizable ionic monomers (pages 417–423)

      Brian J. Adzima, Steve C. Taylor, Hongkun He, David R. Luebke, Krzysztof Matyjaszewski and Hunaid B. Nulwala

      Article first published online: 26 NOV 2013 | DOI: 10.1002/pola.27016

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      A facile synthetic route is used to access radically polymerized triazolium based ionic monomers. In the resulting Poly(ionic liquids)s, pendant functional groups have a large effect on the solubility, Tg, and thermal stability.

    16. Synthesis of a phosphinated acetoxybenzoic acid and its application in enhancing Tg and flame retardancy of poly(ethylene terephthalate) (pages 424–434)

      Ching Hsuan Lin, Chu Ming Huang, Meng Wei Wang, Shenghong A. Dai, Hou Chien Chang and Tzong Yuan Juang

      Article first published online: 26 NOV 2013 | DOI: 10.1002/pola.27017

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      A phosphinated acetoxybenzoic acid (3) is prepared by a three-step procedure. Based on the acidolysis and polycondensation of (3) and poly(ethylene terephthalate) (PET), phosphinated copolyesters with various phosphorus contents are prepared. The glass transition temperature and flame resistance of PET are enhanced via this modification.

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