Macromolecular Chemistry and Physics

Cover image for Vol. 212 Issue 20

October 17, 2011

Volume 212, Issue 20

Pages 2186–2280

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    1. Macromol. Chem. Phys. 20/2011 (page 2186)

      Norbert Stribeck, Ahmad Zeinolebadi, Morteza Ganjaee Sari, Achim Frick, Marzena Mikoszek and Stephan Botta

      Version of Record online: 12 OCT 2011 | DOI: 10.1002/macp.201190044

      Thumbnail image of graphical abstract

      Cover: Thermoplastic polyurethanes (TPUs) injectionmolded at different temperatures are studied. As shown in the cover image, straining is monitored by SAXS, the analysis yields domain dimension distributions, a nonaffine straining mechanism is identified, and, as a function of molding temperature, structure and its evolution are described. Further details can be found in the article by on N. Stribeck,* A. Zeinolebadi, M. G. Sari, A. Frick, M. Mikoszek, and S. Botta on page 2234.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
  3. Full Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    1. Novel Glycopolymer Brushes via ATRP: 1. Synthesis and Characterization (pages 2191–2208)

      Reda Fleet, Eric T. A. van den Dungen and Bert Klumperman

      Version of Record online: 14 SEP 2011 | DOI: 10.1002/macp.201100288

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      The synthesis of glycopolymer brushes with variation in chain topology is described. The “grafting from” approach is used via atom transfer radical polymerization. A series of copolymers with an average grafting density of 50% (i.e., one graft per two repeat units of the backbone) are prepared. The use of random, alternating, and block copolymers as the backbone leads to the different topologies.

    2. Novel Glycopolymer Brushes via ATRP: 2. Thermal and Mechanical Properties (pages 2209–2216)

      Reda Fleet, Eric T. A. van den Dungen and Bert Klumperman

      Version of Record online: 7 SEP 2011 | DOI: 10.1002/macp.201100289

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      Polymer brushes are characterized by large free volume in the bulk, which has previously led to the observation of super-soft elastomers. The properties of glycopolymer brushes with variable chain topology are studied. Due to the high glass transition temperature and poor thermal stability, the study is limited to temperatures around the Tg and the solution phase.

    3. A Facile Approach to Fabricate Self-Standing Gel-Polymer Electrolytes for Flexible Lithium-Ion Batteries by Exploitation of UV-Cured Trivalent/Monovalent Acrylate Polymer Matrices (pages 2217–2223)

      Eun-Hye Kil, Hyo-Jeong Ha and Sang-Young Lee

      Version of Record online: 7 SEP 2011 | DOI: 10.1002/macp.201100248

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      A facile approach to fabricate a self-standing GPE for flexible lithium-ion batteries based on the exploitation of a UV-cured trivalent (ETPTA)/monovalent (EGMEA) acrylate polymer matrix is demonstrated. The ETPTA/EGMEA-based GPE (M-GPE) shows improved flexibility, ionic conductivity, and interfacial compatibility with electrodes compared to the ETPTA-based GPEs (E-GPEs).

    4. Hydrogen Abstraction Followed by Nitroxide-Mediated Polymerization: Synthesis of 2,7-Dibromofluorene-Labeled Polystyrene (pages 2224–2233)

      William E. Butcher and Eric S. Tillman

      Version of Record online: 7 SEP 2011 | DOI: 10.1002/macp.201100291

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      Polystyrene with varying amounts of end-labeling is synthesized by decomposing a traditional radical initiator in the presence of fluorene, 2-bromofluorene, or 2,7-dibromofluorene, followed by mediation of the polymerization by TEMPO. The results indicate that replacing the 2,7 hydrogens on the fluorene moiety with bromine atoms leads to polymers with a higher extent of chromophore labeling.

    5. Structure and Mechanical Properties of an Injection-Molded Thermoplastic Polyurethane as a Function of Melt Temperature (pages 2234–2248)

      Norbert Stribeck, Ahmad Zeinolebadi, Morteza Ganjaee Sari, Achim Frick, Marzena Mikoszek and Stephan Botta

      Version of Record online: 19 SEP 2011 | DOI: 10.1002/macp.201100193

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      Injection molded TPU (sealing-grade) studied by 2D SAXS exhibits a simple “sandwich” (hard-soft-hard) domain structure. Shape distributions of hard and soft domains during straining are investigated. The lengthening is highly non-affine. Simple analysis reveals nanostructure evolution mechanisms as a function of processing temperature of the melt. At 235 °C a soft material with weak hard domains is made.

    6. Tunable Arrangement of Gold Nanoparticles in Epoxidated Poly(styrene-block-butadiene) Diblock Copolymer Matrices (pages 2249–2259)

      Shiao-Wei Kuo and Hong-Ying Yang

      Version of Record online: 7 SEP 2011 | DOI: 10.1002/macp.201100360

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      Au nanoparticles disperse well in the PS block segment of a poly(styrene-block-vinyl oxirane) (PS-b-PBO) diblock copolymer matrix upon partial crosslinking of the PBO block segment with poly(ethylene oxide bisamine) (D230). The crosslinking prohibits Au nanoparticle aggregation and diffusion into the PBO block segment, as verified by TEM and SAXS analyses.

    7. Bisfuran-s-Tetrazine-Based Conjugated Polymers: Synthesis, Characterization, and Photovoltaic Properties (pages 2260–2267)

      Zhao Li and Jianfu Ding

      Version of Record online: 8 SEP 2011 | DOI: 10.1002/macp.201100358

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      Two new bisfuran-s-tetrazine-based low-bandgap polymers are designed and synthesized. UV and CV studies show that these polymers have promising properties for photovoltaic (PV) applications, but PV devices made from these polymers do not deliver promising photovoltaic performance. The reason behind is revealed by UV spectra, which demonstrate inefficient conjugation and π–π stacking.

    8. Mimic of Protein: A Highly pH-Sensitive and Thermoresponsive Polyampholyte (pages 2268–2274)

      Yuqiong Xia, Min Gao, Ye Chen, Xinru Jia and Dehai Liang

      Version of Record online: 8 SEP 2011 | DOI: 10.1002/macp.201100352

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      As a mimic of protein, a polyampholyte-based material duplicates the properties and functions of protein. A change of 10 °C in the transition point with a pH difference of 0.10 units is achieved by a polyampholyte with a suitable isoelectric pH and thermoresponsive groups.

    9. Poisson's Ratios of Honeycomb-Structured Polymer Sheets Under Large Deformation (pages 2275–2280)

      Dae-Yoon Kim, Namil Kim, Seok-Ho Hwang, Shiao-Wei Kuo, Jong-Hoon Lee, Sang-A Lee, Joong Hee Lee, Changwoon Nah and Kwang-Un Jeong

      Version of Record online: 7 SEP 2011 | DOI: 10.1002/macp.201100253

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      Total and local Poisson's ratios of a honeycomb-structured polymer sheet at a 30° polar angle are lower than those at the 0° polar angle over the entire strain range. The difference becomes smaller when the tensile strain is increased.

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