Polymer International

Cover image for Vol. 60 Issue 5

May 2011

Volume 60, Issue 5

Pages 717–871

  1. Research Articles

    1. Top of page
    2. Research Articles
    1. Multiarm star-like unimolecular micelles with a dendritic core and a dual thermosensitive shell (pages 717–724)

      Shizhong Luo, Xianglong Hu, Congxiang Ling, Xi Liu, Shuaishuai Chen and Mengcheng Han

      Version of Record online: 14 DEC 2010 | DOI: 10.1002/pi.2989

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      The reversible double phase transition behavior of unimolecular polymeric micelles with a hydrophobic dendritic macromolecule (H40) as the core and a hydrophilic block copolymer of poly(N-isopropylacrylamide)-block-poly(N-isopropylmethacrylamide) (PNIPAM-b-PNIPMAM) as the double shell was studied in detail.

    2. Design, synthesis and characterization of a novel self-doped polyaniline derivative (pages 725–729)

      Hongtao Liu, Danming Chao, Xincai Liu, Xiaoteng Jia, Libing He, Lili Cui, Lei Yao and Ce Wang

      Version of Record online: 24 DEC 2010 | DOI: 10.1002/pi.2990

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      A new self-doped polyaniline derivative has been synthesized by oxidative coupling polymerization. The polymer retains excellent electrochemical activity in a broad pH range (pH = 1–12).

    3. Substituent effects on thermal and photo-alignment behavior of poly(ethylene imine)s carrying azobenzene side groups (pages 730–737)

      Mohammad Kamruzzaman, Yutaka Kuwahara, Tomonari Ogata, Seiji Ujiie and Seiji Kurihara

      Version of Record online: 24 DEC 2010 | DOI: 10.1002/pi.2997

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      Poly(ethylene imine)s having variously substituted azobenzene side-chain groups show reversible alignment behavior on annealing and on UV and non-polarized visible light irradiation. Alignment behavior is greatly dependent on the substituent group.

    4. A modified model of electrical conduction for carbon black–polymer composites (pages 738–742)

      Jia Yang and Jizhao Liang

      Version of Record online: 24 DEC 2010 | DOI: 10.1002/pi.3002

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      This paper presents a modified model of electrical conduction for carbon black–polymer composites. Predicted electrical conductivity and percolation threshold of the model are in agreement with experimental data.

    5. Polyaniline-modified cellulose nanofibrils as reinforcement of a smart polyurethane (pages 743–750)

      María L Auad, Tara Richardson, William J Orts, Eliton S Medeiros, Luiz HC Mattoso, Mirna A Mosiewicki, Norma E Marcovich and Mirta I Aranguren

      Version of Record online: 24 DEC 2010 | DOI: 10.1002/pi.3004

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      Segmented polyurethanes exhibiting shape memory properties were modified by the addition of polyaniline-coated cellulose nanofibrils, showing a step change in properties between 4 and 10 wt% nanofibrils.

    6. Fabrication of surface-modified CdSe quantum dots by self-assembly of a functionalizable comb polymer (pages 751–757)

      Wei Zou, Zhong-jie Du, Hang-quan Li and Chen Zhang

      Version of Record online: 24 DEC 2010 | DOI: 10.1002/pi.3005

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      A facile approach is proposed for the fabrication of surface-modified CdSe quantum dots (QDs) with compatibility with various media and better dispersibility by self-assembly of a functionalizable comb polymer.

    7. Evaluation of heat treatment regimes and their influences on the properties of powder-printed high-density polyethylene bone implant (pages 758–764)

      Jintamai Suwanprateeb, Somrudee Kerdsook, Tanyarat Boonsiri and Patcharee Pratumpong

      Version of Record online: 24 DEC 2010 | DOI: 10.1002/pi.3006

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      The change in physical and mechanical properties of powder-printed high-density polyethylene is governed by porosity and polyethylene interface which in turn are influenced by the degree of thermally induced densification and binder degradation.

    8. Fracture behaviour of controlled-rheology ethylene–propylene block copolymers (pages 765–771)

      Alicia Salazar, Tamara Martín, José M Navarro and Jesús Rodríguez

      Version of Record online: 6 JAN 2011 | DOI: 10.1002/pi.3012

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      The addition of di-tert-butylperoxide to ethylene-propylene block copolymers (EPBCs) reduces the slope of the R-curves. This loss of ductility and fracture toughness is due to the decrease in the molecular weight.

    9. Morphology and properties of stearate-intercalated layered double hydroxide nanoplatelet-reinforced thermoplastic polyurethane (pages 772–780)

      Moumita Kotal, Suneel Kumar Srivastava, Anil Kumar Bhowmick and Sunity Kumar Chakraborty

      Version of Record online: 6 JAN 2011 | DOI: 10.1002/pi.3013

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      Polyurethane (PU)/stearate-intercalated layered double hydroxide (LDH) nanocomposites have been prepared by solution blending and characterized to investigate the influence of stearate intercalation in LDH on the properties of the nanocomposites.

    10. Toughening of polypropylene with crystallizable poly(ethylene oxide) (pages 781–786)

      Xiuyun Li, Run Su, Jian Gao, Nan Zhang, Kun Jiang, Feng Luo, Ke Wang and Qiang Fu

      Version of Record online: 9 FEB 2011 | DOI: 10.1002/pi.3015

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      Crystallizable poly(ethylene oxide) (PEO) was used as a new modifier to tailor the toughness of isotactic polypropylene (PP). The addition of PEO induces moderate amounts of β-form PP.

    11. α-Amino acids as initiators of ε-caprolactone and L,L-lactide polymerization (pages 787–793)

      Ewa Oledzka, Kamil Sokolowski, Marcin Sobczak and Waclaw Kolodziejski

      Version of Record online: 6 JAN 2011 | DOI: 10.1002/pi.3016

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      Environmentally friendly α-amino acids were used as initiators in the ring-opening polymerization of cyclic esters. Due to their biological activity, these initiators may open a new route for the synthesis of functional polymers.

    12. Suspension polymerization of aniline hydrochloride in non-aqueous media (pages 794–797)

      Elena N Konyushenko, Jaroslav Stejskal, Miroslava Trchová and Jan Prokeš

      Version of Record online: 11 JAN 2011 | DOI: 10.1002/pi.3017

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      We report the oxidation of aniline hydrochloride in various organic solvents—protic, aprotic, polar, non-polar—in which the reactant (aniline hydrochloride) and oxidant (ammonium peroxydisulfate) are not completely soluble. Polyaniline prepared in the classic way in aqueous media always contains water which is difficult to remove by drying. The preparation of polyaniline in non-aqueous media may therefore become important when the presence of water has to be avoided in subsequent applications such as in electrochemistry or catalysis. The washing of samples with water would be skipped in such cases.

    13. Atomic force microscopy study of self-assembly behaviors of hydrophobic poly(n-butyl methacrylate)-block-polydimethylsiloxane-block-poly(n-butyl methacrylate) ABA triblock copolymers (pages 798–806)

      Huanbing Wang, Qingsheng Tao, Jinfang Wang and Ezat Khoshdel

      Version of Record online: 11 JAN 2011 | DOI: 10.1002/pi.3018

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      Highly ordered microdomains formed on films of poly(n-butyl methacrylate)-block-polydimethylsiloxane-block-poly(n-butyl methacrylate) for samples with (a) fPDMS = 0.178 and (b) fPDMS = 0.403 on silicon wafer, and for samples with (c) fPDMS = 0.178 and (d) fPDMS = 0.403 on mica wafer (where fPDMS is the volume fraction of polydimethylsiloxane).

    14. Polyester and multiwalled carbon nanotube composites: characterization, electrical conductivity and antibacterial activity (pages 807–815)

      Chin-San Wu

      Version of Record online: 9 FEB 2011 | DOI: 10.1002/pi.3022

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      Polyester-functionalized multiwalled carbon nanotubes (MWCNTs) were prepared to provide multifunctional properties. The current study demonstrates an enhancement in the compatibility between poly(butylene terephthalate) (PBT) composites and MWCNTs with consequent improvements in antibacterial activity, electrical conductivity and antistatic efficiency when the proportion of multihydroxyl-functionalized MWCNTs in the composites is 1 wt%.

    15. Preparation of graphene/poly(vinyl alcohol) nanocomposites with enhanced mechanical properties and water resistance (pages 816–822)

      Jingchao Wang, Xianbao Wang, Chunhui Xu, Min Zhang and Xiaopeng Shang

      Version of Record online: 26 JAN 2011 | DOI: 10.1002/pi.3025

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      Graphene/poly(vinyl alcohol) composites with enhanced mechanical properties and water resistance were prepared by incorporating graphene oxide into poly(vinyl alcohol) aqueous solution with subsequent reduction of graphene oxide to graphene sheets.

    16. Characterization of carbon black-filled immiscible polypropylene/polystyrene blends (pages 823–832)

      Yeqiang Tan, Yihu Song, Qing Cao and Qiang Zheng

      Version of Record online: 2 FEB 2011 | DOI: 10.1002/pi.3026

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      Ternary carbon black (CB)/polypropylene (PP)/polystyrene (PS) composites exhibiting distinct rod-like morphology with CB enrichment in the interfacial region show slow phase coalescence and filler agglomeration and good conduction stability during thermal cycles.

    17. Synthesis of chiral stationary phase via surface-initiated atom transfer radical polymerization of vinylated cellulose 3,5-dimethylphenylcarbamate (pages 833–838)

      In-Ae Bae, Jung-Hyun Park and Seong-Ho Choi

      Version of Record online: 26 JAN 2011 | DOI: 10.1002/pi.3027

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      Cellulose 3,5-dimethylphenylcarbamate bearing a vinyl group at the 6-position of the cellulose unit was synthesized and the atom transfer radical polymerization method used to immobilize it onto an initiated silica gel.

    18. A study of the effect of styrene concentration on the molecular weight of polypropylene produced using metallocene catalysts (pages 839–844)

      Brian C Peoples, Francisco J Rodríguez, Griselda B Galland, Franco M Rabagliati and Raul Quijada

      Version of Record online: 9 FEB 2011 | DOI: 10.1002/pi.3029

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      The use of styrene to control the molecular weight of polypropylene produced using metallocene catalysts was explored. The concentration of styrene used directly influenced the molecular weight of the polymers produced.

    19. Supramolecular columnar nanostructures from self-organization of coil–rod–coil molecules incorporating an anthracene unit (pages 845–850)

      Ke-li Zhong, Zhijin Man, Zhegang Huang, Tie Chen, Bingzhu Yin and Long Yi Jin

      Version of Record online: 9 FEB 2011 | DOI: 10.1002/pi.3030

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      We report the synthesis and self-assembly behavior of n-shaped coil–rod–coil molecules. The results reveal that these molecules self-assemble into various columnar assemblies in the liquid-crystalline mesophase, depending on the volume fraction of the coil segment.

    20. Property tailoring of phenol–formaldehyde matrices by control of reactant molar ratio and thermoplastic modification (pages 851–858)

      Nagore Gabilondo, Loli Martin, Aloña Retegi, Inaki Mondragon and Lars A Berglund

      Version of Record online: 10 FEB 2011 | DOI: 10.1002/pi.3032

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      A thermoplastic content of 5 wt % leads to a morphology in which 1.2 µm poly(vinyl butyral) particles are embedded in the phenol–formaldehyde matrix.

    21. Optimizing the nanofibrous morphology of electrospun poly[(butylene succinate)- co-(butylene adipate)]/clay nanocomposites and revealing the effect of the fibre nano-dimension on the attained material properties (pages 859–871)

      Athanasia Tsimpliaraki, Ioannis Zuburtikudis, Sotirios I Marras and Costas Panayiotou

      Version of Record online: 10 FEB 2011 | DOI: 10.1002/pi.3034

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      Optimum fibrous morphology and clay intercalation without seriously affecting thermal stability can be achieved for solution concentrations between 17.7 and 18.15% (w/v) and at the lower limit of the ‘sweet-spot’ region for clay loading (6 wt%).

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