Polymer International

Cover image for Vol. 61 Issue 1

January 2012

Volume 61, Issue 1

Pages 1–148

  1. Editorial

    1. Top of page
    2. Editorial
    3. Perspectives
    4. Review
    5. Research Articles
  2. Perspectives

    1. Top of page
    2. Editorial
    3. Perspectives
    4. Review
    5. Research Articles
    1. Tuning polyolefins and polydienes microstructure and architecture via coordinative chain transfer polymerization (pages 2–5)

      Philippe Zinck

      Version of Record online: 3 OCT 2011 | DOI: 10.1002/pi.3175

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      New paradigms involving coordination polymerization and transalkylation reactions afford unprecedented control over polymer microstructure and architecture.

    2. Alternative feedstocks: a continuing trend in the polymer industry? (pages 6–8)

      Dirk J Dijkstra and Gerhard Langstein

      Version of Record online: 21 NOV 2011 | DOI: 10.1002/pi.3209

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      New feedstocks will become available that canbe used to make polymers. This paper elucidates the historical developments and the possibilities to use these alternative feedstocks.

  3. Review

    1. Top of page
    2. Editorial
    3. Perspectives
    4. Review
    5. Research Articles
    1. Autonomic healing and welding by interdiffusion of dangling chains in a weak gel (pages 9–16)

      Masayuki Yamaguchi, Rika Maeda, Ryota Kobayashi, Tadashi Wada, Susumu Ono and Shogo Nobukawa

      Version of Record online: 14 SEP 2011 | DOI: 10.1002/pi.3160

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      This review focuses on self-repairing polymers composed of a weak gel. Because of the entanglement couplings of dangling chains, a weak gel shows autonomic repairing behaviour without any manual intervention. These novel intelligent materials can be prepared using various types of crosslinked polymers.

  4. Research Articles

    1. Top of page
    2. Editorial
    3. Perspectives
    4. Review
    5. Research Articles
    1. Physical characterization of poly(glycerol sebacate)/Bioglass® composites (pages 17–22)

      Shuling Liang, Wayne D Cook and Qizhi Chen

      Version of Record online: 7 OCT 2011 | DOI: 10.1002/pi.3165

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      DMTA and DSC of the dry PGS composites confirm the semicrystalline nature of the materials and when saturated with water shows that the ionic crosslinks are dissociated by water molecules.

    2. Poly(sodium 4-styrene sulfonate) and poly(2-acrylamido glycolic acid) polymer–clay ion exchange resins with enhanced mechanical properties and metal ion retention (pages 23–29)

      Bruno Urbano and Bernabé L Rivas

      Version of Record online: 3 OCT 2011 | DOI: 10.1002/pi.3178

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      Novel ion exchange resins, which consist in a polymeric matrix with montmorillonite layer dispersed and occluded within the matrix. Montmorillonite improves both the mechanical properties and metal ion uptake.

    3. Poly(L-lactic acid) metal organic framework composites: optical, thermal and mechanical properties (pages 30–37)

      Dhayalan Elangovan, Isinay E Yuzay, Susan E M Selke and Rafael Auras

      Version of Record online: 20 OCT 2011 | DOI: 10.1002/pi.3186

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      Poly(L-lactic acid), PLLA, and metal organic frameworks (MOFs) were melt compounded. A significant decrease in the brittleness of the PLLA-MOF composites was found.

    4. Electromagnetic activation of a shape memory copolymer matrix incorporating ferromagnetic nanoparticles (pages 38–42)

      Dan Yang, Wei Huang, Xiaohua He and Meiran Xie

      Version of Record online: 7 OCT 2011 | DOI: 10.1002/pi.3188

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      When heated above the melting temperature of the copolymer by contact heating or via embedded magnetic nanoparticles in an electromagnetic field (contactless heating), the specimen recovers its original flat shape.

    5. Biodegradable elastomers based on ABA triblocks: influence of end-block crystallinity on elastomeric character (pages 43–50)

      Jen Fong Kong, Vitali Lipik, Marc JM Abadie, Gulam Roshan Deen and Subbu S Venkatraman

      Version of Record online: 6 JUL 2011 | DOI: 10.1002/pi.3130

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      ABA triblock copolymers are produced by copolymerizing L-lactide and ε-caprolactone as B block and poly(L-lactide) as A blocks. The segment length of these blocks produces a range of elastomeric properties.

    6. Charge transport mechanism of graphite-nanosheet-loaded rubber nanocomposites (pages 51–54)

      Waleed E Mahmoud and Ahmed A Al-Ghamdi

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/pi.3131

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      Conduction in dielectrics may be due to charge carriers that are released by thermal activation over a Coulombic potential barrier that is decreased by the applied electric field.

    7. Broadband dielectric spectroscopy studies of glassy-state relaxations in annealed poly(2,5-benzimidazole) (pages 55–64)

      Amol Nalawade, Mohammad K. Hassan, William A. Jarrett, Kenneth A. Mauritz and Morton H. Litt

      Version of Record online: 30 AUG 2011 | DOI: 10.1002/pi.3147

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      The effect of annealing on sub-glass transition motions of poly(2,5-benzimidazole) was investigated using dielectric spectroscopy. A trend in charge migration pathway connectivity and the dc conductivity was observed.

    8. Perfluoropolyether polymers by UV curing: design, synthesis and characterization (pages 65–73)

      Roberta Bongiovanni, Andrea Medici, Alberto Zompatori, Silvia Garavaglia and Claudio Tonelli

      Version of Record online: 17 OCT 2011 | DOI: 10.1002/pi.3149

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      Perfluoropolyether (PFPE) acrylic polymers were synthesized by UV curing. They show good thermal resistance, low surface tension and very low refractive index. They are suitable for use in photonic devices and nano-patterning.

    9. Novel bioresorbable hydrogels prepared from chitosan-graft-polylactide copolymers (pages 74–81)

      Yanfei Hu, Yufei Liu, Xu Qi, Pei Liu, Zhongyong Fan and Suming Li

      Version of Record online: 30 AUG 2011 | DOI: 10.1002/pi.3150

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      Biodegradable chitosan-graft-polylactide (CS-g-PLA) copolymers were prepared by grafting poly(L-lactide) (PLLA) or poly(D-lactide) (PDLA) precursor to the backbone of chitosan using N,N′-carbonyldiimidazole (CDI) as coupling agent. Hydrogels were prepared by mixing water-soluble CS-g-PLLA and CS-g-PDLA solutions.

    10. Nanostructure and properties of proton-conducting sulfonated poly(ether ether ketone) (SPEEK) and zirconia–SPEEK hybrid membranes for direct alcohol fuel cells: effect of the nature of swelling solvent and incorporation of heteropolyacid (pages 82–92)

      Carla Akimi Kawaguti, Karim Dahmouche and Ailton de Souza Gomes

      Version of Record online: 4 AUG 2011 | DOI: 10.1002/pi.3151

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      A model is proposed to explain how the structural changes induced by swelling of sulfonated poly(ether ether ketone) (SPEEK) and zirconia–SPEEK hybrid membranes by water or ethanol affect their protonic conductivity, permeability and swelling ability. This model consists of a two-level hierarchical structure of solvent-swelled spatially correlated primary SO3H-rich ionic clusters, forming larger secondary aggregates well dispersed in the PEEK-based matrix.

    11. Preparation and characterization of graphene composites with conducting polymers (pages 93–98)

      Le Kim Huyen Trang, Tran Thanh Tung, Tae Young Kim, Woo Seok Yang, Hyeongkeun Kim and Kwang S Suh

      Version of Record online: 10 AUG 2011 | DOI: 10.1002/pi.3152

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      G-PSS:PEDOT composite materials were prepared having high electrical conductivity together with thermal stability. Thin films demonstrate good environmental stability in terms of a delay in the deterioration of conductivity and optical properties during accelerated weathering tests.

    12. Synthesis and antimicrobial activity of biocidal polymer–montmorillonite nanocomposites (pages 99–110)

      Nehal Salahuddin, Badr Badr and Rehab Abdeen

      Version of Record online: 15 SEP 2011 | DOI: 10.1002/pi.3153

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      A novel nanocomposite based on polyoxypropylene-montmorillonite (D2000–MMT)/p-hydroxymethylbenzoate strongly inhibits the growth of Escherichia coli, Bacillus subtilis, Candida albicans and Cryptococcus neoformans.

    13. Preparation and properties of polyimide solvent-resistant nanofiltration membrane obtained by a two-step method (pages 111–117)

      Bing Fang, Kai Pan, Qinghan Meng and Bing Cao

      Version of Record online: 14 SEP 2011 | DOI: 10.1002/pi.3154

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      A new polyimide solvent resistance nanofiltration membrane was prepared by two-step method (casting the membrane first then crosslink by thermal imidization method). The membranes were stable in most of the solvents tested and had outstanding separation properties.

    14. Stress photo-oxidative aging behaviour of polyamide 6 (pages 118–123)

      Xiaohe Li, Xiaowen Zhao and Lin Ye

      Version of Record online: 14 NOV 2011 | DOI: 10.1002/pi.3155

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      The long-term stress accelerating aging behavior of polyamide 6 (PA6) was studied by exposure to UV irradiation. The aging behavior and mechanism of PA6 were investigated.

    15. Flexible polybenzoxazine thermosets containing pendent aliphatic chains (pages 124–128)

      Tarek Agag, Ahmed Akelah, Ahmed Rehab and Salwa Mostafa

      Version of Record online: 15 SEP 2011 | DOI: 10.1002/pi.3156

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      A novel class of benzoxazine monomers has been prepared as precursor for flexible polybenzoxazines. The monomers are characterized by easy synthesis via solventless method and low melting points, which facilitate their processing.

    16. Effect of aminobisphosphonated copolymer on the thermal stability and flammability of poly(methyl methacrylate) (pages 129–134)

      Hossein Vahabi, Claire Longuet, Laurent Ferry, Ghislain David, Jean-Jacques Robin and José-Marie Lopez-Cuesta

      Version of Record online: 14 SEP 2011 | DOI: 10.1002/pi.3158

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      Phosphorus from the comonomer acts both in the solid and vapour phases. Phosphorus-containing volatile products are released at high temperature and contribute to decrease the heat release rate (HRR) of poly(methyl methacrylate) (PMMA).

    17. Transformation of complex internal structures of poly(ethylene oxide)/chitosan oligosaccharide electrospun nanofibers (pages 135–140)

      Jianfeng Zhang and Jun Nie

      Version of Record online: 17 OCT 2011 | DOI: 10.1002/pi.3159

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      Nanofibers with core-shell or internal microphase-separated structure were electrospun from homogeneous solutions. The formation and transformation of the structures are due to phase separation during electrospinning.

    18. Migration of styrene from plastic packaging based on polystyrene into food simulants (pages 141–148)

      Despoina Paraskevopoulou, Dimitris S Achilias and Adamantini Paraskevopoulou

      Version of Record online: 23 SEP 2011 | DOI: 10.1002/pi.3161

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      Migration of styrene monomer from either rigid or foamed polystyrene cups into several food simulants (water, ethanolic solution and isooctane) for various temperatures and time periods was investigated.

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