Macromolecular Chemistry and Physics

Cover image for Vol. 214 Issue 10

May 27, 2013

Volume 214, Issue 10

Pages 1065–1164

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      Macromol. Chem. Phys. 10/2013 (page 1065)

      Hasan Türe, Thomas O. J. Blomfeldt, Mikael Gällstedt, Mikael S. Hedenqvist and Stefano Farris

      Article first published online: 16 MAY 2013 | DOI: 10.1002/macp.201370033

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      Front Cover: Wheat gluten and the silica precursor tetraethoxylane are successfully assembled by a soft chemistry approach for the preparation of new hybrid materials. The acid-catalyzed in situ polymerization of silica in the presence of wheat gluten generates an interpenetrating 3D network with unprecedented physicochemical properties of the final materials. Further details can be found in the article by H. Türe, T. O. J. Blomfeldt, M. Gällstedt, M. S. Hedenqvist, and S. Farris* on page 1131.

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    1. Macromol. Chem. Phys. 10/2013

      Article first published online: 16 MAY 2013 | DOI: 10.1002/macp.201370034

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    1. Macromol. Chem. Phys. 10/2013 (pages 1067–1070)

      Article first published online: 16 MAY 2013 | DOI: 10.1002/macp.201370035

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    1. Macromol. Chem. Phys. 10/2013 (page 1071)

      Article first published online: 16 MAY 2013 | DOI: 10.1002/macp.201370036

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      This issue of Macromolecular Chemistry and Physics contains articles of the Special Series “New Frontiers in Functional Polymers”.

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    1. ZnII Bisterpyridine Metallopolymers: Improved Processability by the Introduction of Polymeric Side Chains (pages 1072–1080)

      Andreas Wild, Anke Teichler, Christian von der Ehe, Andreas Winter, Martin D. Hager, Bing Yao, Baohua Zhang, Zhiyuan Xie, Wai-Yeung Wong and Ulrich S. Schubert

      Article first published online: 2 APR 2013 | DOI: 10.1002/macp.201300003

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      Tailoring of the optical and mechanical properties of bisterpyridine coordination polymers is enabled by the introduction of well-defined polymeric side chains. The resulting metallopolymers exhibit improved solubility and processability and can, therefore, easily be inkjet-printed. The photophysical properties of the so-produced homogeneous films are investigated and a proof-of-principle polymer light-emitting device can be constructed.

    2. Benzo[1,2-b:4,5-b′]dithiophene-alt-terthiophene Copolymers Containing Styryl-Triphenylamine Side Chains: Synthesis and Photovoltaic Performance Optimization with Fullerene Acceptors (pages 1081–1088)

      Xitian Wang, Zhi-Guo Zhang, Wenli Tang, Suling Shen, Guo Liu, Dan Chi, Yongfang Li and Jizheng Wang

      Article first published online: 16 APR 2013 | DOI: 10.1002/macp.201300041

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      A new copolymer is designed and synthesized, and the photovoltaic performance is optimized with fullerene acceptors. The energy loss and the increase in the observed open-circuit voltages are quantitatively explained by the up-shifted lowest unoccupied molecular level of indene-C60 bisadduct (ICBA) and the reduced saturation current in the blends.

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    1. Lamellar Morphology of an ABA Triblock Copolymer with a Main-Chain Nematic Polyester Central Block (pages 1089–1093)

      Kazunori Sato, Maito Koga, Sungmin Kang, Koichi Sakajiri, Junji Watanabe and Masatoshi Tokita

      Article first published online: 19 APR 2013 | DOI: 10.1002/macp.201300073

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      An ABA triblock copolymer that is composed of poly(styrene) (PS) A blocks and a main-chain nematic liquid crystal (LC) B block forms a lamellar morphology with a 27 nm spacing. The LC blocks, 63 nm contour length, are primarily more extended in the lamellar direction and meander through the LC lamella to bridge the PS domains.

    2. Polystyrene Brushes on Fully Deuterated Organic Nanoparticles by Surface-Initiated Nitroxide-Mediated Radical Polymerization (pages 1094–1106)

      Markus Mazurowski, Katrin Sondergeld, Johannes Elbert, Chang Jong Kim, Junyu Li, Henrich Frielinghaus, Markus Gallei, Bernd Stühn and Matthias Rehahn

      Article first published online: 16 APR 2013 | DOI: 10.1002/macp.201200733

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      Fully deuterated polystyrene (PS) core particles are synthesized by emulsion polymerization and modified with a functional shell for surface-initiated nitroxide-mediated radical polymerization (SI-NMRP) of styrene. A convenient synthetic protocol is given to obtain the deuterated monomers, styrene-d8 and divinylbenzene-d10, with a high degree of deuteration (>96%). Polymerization conditions are optimized leading to defined PS polymer brushes on deuterated particles.

    3. High-Efficiency Preparation of Macrocyclic Polymers via a Circulatory Extraction–Cyclization Strategy (pages 1107–1113)

      Xing Zhu, Nianchen Zhou, Jian Zhu, Zhengbiao Zhang, Wei Zhang, Zhenping Cheng, Yingfeng Tu and Xiulin Zhu

      Article first published online: 18 MAR 2013 | DOI: 10.1002/macp.201300060

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      A high-efficiency Cu-catalyzed azide/alkyne cycloaddition “click” synthesis of cyclic polystyrene (PS) and cyclic poly (methyl methacrylate) (PMMA) via a circulatory technique of evaporation–condensation–extraction–inflow strategy is reported. High-output cyclic PS and cyclic PMMA are efficiently achieved. This promising preparation should be beneficial to the potential large-scale application and research of cyclic polymers.

    4. “One-Pot” In Situ Formation of Gold Nanoparticles within Poly(acrylamide) Hydrogels (pages 1114–1121)

      Natalya Dolya, Oscar Rojas, Sabine Kosmella, Brigitte Tiersch, Joachim Koetz and Sarkyt Kudaibergenov

      Article first published online: 18 MAR 2013 | DOI: 10.1002/macp.201200727

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      Gold nanoparticles (AuNPs) surrounded by a shell containing poly(ethyleneimine) and ionic liquid (IL) are formed in situ in a poly(acrylamide) hydrogel matrix. Conductometric measurements show that the core–shell AuNPs formed in a “one-pot” synthesis are much better immobilized due to additional hydrogen bonding between the IL and the hydrogel matrix.

    5. Preparation and Properties of Hybrid Materials Originating from Polybenzoxazines and Silsesquioxanes (pages 1122–1130)

      Zien Fu, Kai Xu, Xin Liu, Jianchen Wu, Chanjuan Tan and Mingcai Chen

      Article first published online: 8 APR 2013 | DOI: 10.1002/macp.201200604

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      A polybenzoxazine-bridged polysilsesquioxane material based on BFS and Ba is prepared and characterized. Due to the lamellar structure, and the low polarity of fluorenyl and silsesquioxane, the cured materials exhibit a low dielectric constant and water absorption. Furthermore, the glass-transition temperature of the cured polymer, based on Ba, is markedly improved by modifying with BFS.

    6. Nanostructured Silica/Wheat Gluten Hybrid Materials Prepared by Catalytic Sol–Gel Chemistry (pages 1131–1139)

      Hasan Türe, Thomas O. J. Blomfeldt, Mikael Gällstedt, Mikael S. Hedenqvist and Stefano Farris

      Article first published online: 1 FEB 2013 | DOI: 10.1002/macp.201200646

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      An integrated physicochemical approach is used to produce silica/wheat gluten hybrid composites through sol–gel chemistry. Silica constrains the organic network, leading to enhanced thermal properties, whereas the constraint does not affect the moisture-diffusion properties of the hybrid network. The reduced moisture diffusivity of the hybrid materials is explained in terms of geometric impedance.

    7. Free-Radical Polymerization of N-Vinylimidazole and Quaternized Vinylimidazole in Aqueous Solution (pages 1140–1146)

      Sandhya Santanakrishnan and Robin A. Hutchinson

      Article first published online: 16 APR 2013 | DOI: 10.1002/macp.201300044

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      The polymerization rate of N-vinylimidazole in aqueous solution is a strong function of pH due to degradative addition to monomer. At a pH of 1, the rate is identical to that of quaternized N-vinyl imidazole. The observed experimental polymerization behavior is well represented over a range of operating conditions by a simple model accounting for the side reactions.

    8. Bandgap and Molecular-Energy-Level Control of Conjugated-Polymer Photovoltaic Materials Based on 6,12-Dihydro-diindeno[1,2-b;10,20-e]pyrazine (pages 1147–1157)

      Ping Shen, Xinping Liu, Peng Tang, Bin Zhao, Ling Wang, Chao Weng, Jing Cao, Yongxiang Wu, Ya Chen and Songting Tan

      Article first published online: 19 APR 2013 | DOI: 10.1002/macp.201300047

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      Six conjugated polymers based on the indenopyrazine unit are synthesized by copolymerization with different electron-deficient and electron-rich blocks. The effects of the different copolymerized units on the optoelectronic and photovoltaic properties of the polymers are investigated. The results indicate that the bandgaps and energy levels are readily tuned by different copolymerizing units, which can provide a guideline for the design of photovoltaic materials.

    9. Nanoprecipitation of PMMA Stabilized by Core Cross-Linked Star Polymers (pages 1158–1164)

      Miao Miao, Qijing Chen, Chunlei Zhang, Xueteng Cao, Wei Zhou, Qian Qiu and Zesheng An

      Article first published online: 17 APR 2013 | DOI: 10.1002/macp.201300234

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      Core cross-linked star (CCS) polymers can be used to stabilize nanoprecipitation of poly(methyl methacrylate). CCS polymers migrate to and concentrate at the particle surface to stabilize the particles produced by nanoprecipitation sterically, representing a new mechanism of conferring colloidal stability.

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