Macromolecular Chemistry and Physics

Cover image for Vol. 213 Issue 21

November 14, 2012

Volume 213, Issue 21

Pages 2205–2318

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Frontispiece
    7. Full Papers
    1. Macromol. Chem. Phys. 21/2012 (page 2205)

      Carla Vilela, Armando J. D. Silvestre and Michael A. R. Meier

      Article first published online: 2 NOV 2012 | DOI: 10.1002/macp.201290069

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      Front Cover: The symmetric 1,26-diacid and 1,26-diol, both prepared from erucic acid by olefin self-metathesis, were polymerized to yield long-chain aliphatic polyesters. Their renewable origin and possible biodegradability make them attractive candidates to be used as replacement of petroleum-based plastics. For more information, see the Full Paper by C. Vilela, A. J. D. Silvestre, and M. A. R. Meier* on page 2220.

  2. Back Cover

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Frontispiece
    7. Full Papers
    1. Macromol. Chem. Phys. 21/2012 (page 2320)

      Graecia Lugito and Eamor M. Woo

      Article first published online: 2 NOV 2012 | DOI: 10.1002/macp.201290070

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      Back Cover: The graph shows the morphology, as visualized by polarized light microscopy, of neat poly(butylene adipate) (PBA) crystallized at 28 °C, giving irregularly scattering ring bands in spherulites. Ring bands in PBA are seen only at a very narrow range of Tc = 29–31 °C (3 °C range). PBA/poly(vinyl acetate) and PBA/poly(hydroxyether of bisphenol A) blends collectively prove that the ring bands cannot be attributed to α+β polymorphism. For further details, see the article by G. Lugito, and E. M. Woo* on page 2228.

  3. Masthead

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Frontispiece
    7. Full Papers
    1. Macromol. Chem. Phys. 21/2012

      Article first published online: 2 NOV 2012 | DOI: 10.1002/macp.201290071

  4. Contents

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Frontispiece
    7. Full Papers
    1. Macromol. Chem. Phys. 21/2012 (pages 2207–2211)

      Article first published online: 2 NOV 2012 | DOI: 10.1002/macp.201290067

  5. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Frontispiece
    7. Full Papers
    1. Macromol. Chem. Phys. 21/2012 (page 2212)

      Shusuke Yoshihara, Toshiaki Ezaki, Mitsuru Nakamura, Junji Watanabe and Kazuaki Matsumoto

      Article first published online: 2 NOV 2012 | DOI: 10.1002/macp.201290068

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      Frontispiece: Thermal conductivity (TC) of injectionmolded smectic liquid crystalline polymers and the composites is investigated. Shear flow during injection molding induces parallel orientation of chain-folding lamellae, in which polymer chains are aligned in the normal direction with respect to the molding surface, leading to a high TC in this direction. For more information, see the article by S. Yoshihara,* T. Ezaki, M. Nakamura, J. Watanabe, and K. Matsumoto* on page 2213.

  6. Full Papers

    1. Top of page
    2. Cover Picture
    3. Back Cover
    4. Masthead
    5. Contents
    6. Frontispiece
    7. Full Papers
    1. Enhanced Thermal Conductivity of Thermoplastics by Lamellar Crystal Alignment of Polymer Matrices (pages 2213–2219)

      Shusuke Yoshihara, Toshiaki Ezaki, Mitsuru Nakamura, Junji Watanabe and Kazuaki Matsumoto

      Article first published online: 30 AUG 2012 | DOI: 10.1002/macp.201200317

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      Thermal conductivity (TC) of injection-molded main-chain smectic liquid-crystalline polymers and the composites containing hexagonal boron nitride (h-BN) particles is investigated. Shear flow during injection molding induces alignment of lamellar crystals of polymer matrices, which serve as effective heat paths between h-BN particles. The composites exhibit a dramatic enhancement of TC, which is much higher than that of common thermoplastic composites.

    2. Plant Oil-Based Long-Chain C26 Monomers and Their Polymers (pages 2220–2227)

      Carla Vilela, Armando J. D. Silvestre and Michael A. R. Meier

      Article first published online: 31 AUG 2012 | DOI: 10.1002/macp.201200332

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      Renewable long-chain aliphatic polyesters were generated from erucic acid using olefin self-metathesis for the monomer synthesis. Polyesterification of the thus obtained 1,26-hexacosanedioic acid with α,ω-diols yielded the desired long-chain aliphatic polyesters with high crystallinity, melting, and degradation temperatures.

    3. Crystal Polymorphism and Spherulites in Poly(butylene adipate) Diluted with Strongly Versus Weakly Interacting Amorphous Polymers (pages 2228–2237)

      Graecia Lugito and Eamor M. Woo

      Article first published online: 31 AUG 2012 | DOI: 10.1002/macp.201200299

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      Via incorporation of two different types of amorphous polymer, PVAc or phenoxy, into PBA to form blends to reveal, respectively, the varying Tc windows of presence of ring-banded spherulites and polymorphism in PBA or its blends. The results summarily conclude that ring bands in PBA cannot be attributed to its α+β polymorphism. Same behavior is also demonstrated in blend system of PBA/phenoxy investigated for supporting comparison.

    4. Synthesis and Fluorescence Properties of Chiral Near-Infrared Emissive Polymers Incorporating BODIPY Derivatives and (S)-Binaphthyl (pages 2238–2245)

      Yuanzhao Wu, Xuerong Mao, Xiao Ma, Xiaobo Huang, Yixiang Cheng and Chengjian Zhu

      Article first published online: 28 SEP 2012 | DOI: 10.1002/macp.201200335

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      Four novel chiral polymers incorporating BODIPY and (S)-binaphthyl moieties exhibit good anisotropic near-infrared emissive fluorescence.

    5. A Versatile Polymer Co-Network with Broadened Glass Transition Showing Adjustable Multiple-Shape Memory Effect (pages 2246–2252)

      Jing Li, Tuo Liu, Yi Pan, Shuang Xia, Zhaohui Zheng, Xiaobin Ding and Yuxing Peng

      Article first published online: 27 SEP 2012 | DOI: 10.1002/macp.201200231

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      The adjustable multiple-shape memory effects from dual to quadruple are demonstrated for a versatile covalently crosslinked polymer co-network system with tunable macroscopic properties, as the special ability of memorizing four different shapes in a single-shape memory cycle results from its broadened glass transition.

    6. Supramolecular Aqueous Gels Based on Terpyridine-Modified Pluronics (pages 2253–2260)

      Bhavesh Bharatiya, Charles-André Fustin and Jean-François Gohy

      Article first published online: 14 SEP 2012 | DOI: 10.1002/macp.201200347

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      Temperature-dependent sol–gel transitions are observed for aqueous solutions of Pluronics bearing at their extremities terpyridines with or without Ni2+ and Zn2+ ions. Without added metal ions, the thermorheological behavior is controlled by the composition of the Pluronics and the presence of clustered terpyridines. With added metal ions, the thermorheological behavior is essentially controlled by the terpyridine metal ion complexes.

    7. Mesh-Like Vesicles Formed From Blends of Poly(4-vinyl pyridine)-b-polystyrene-b-poly(4-vinyl pyridine) Block Copolymers via Gradual Blending Method (pages 2261–2266)

      Nan Yan, Xiaoping Yang, Yutian Zhu, Jiangping Xu and Yuping Sheng

      Article first published online: 19 SEP 2012 | DOI: 10.1002/macp.201200354

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      A novel blending method, namely, the gradually blending method, was proposed in this study to tune the micellar structure of the binary blends of P4VP43-b-PS260-b-P4VP43 and P4VP43-b-PS366-b-P4VP43 block copolymers. The aggregated micelles prepared using the gradually blending method differed completely from those obtained using the premixing blending method, leading to the formation of some novel micellar structures such as mesh-like vesicles.

    8. Effect of Branched Side Chains on the Physicochemical and Photovoltaic Properties of Poly(3-hexylthiophene) Isomers (pages 2267–2274)

      Chaohua Cui, Yeping Sun, Zhi-Guo Zhang, Maojie Zhang, Jing Zhang and Yongfang Li

      Article first published online: 24 SEP 2012 | DOI: 10.1002/macp.201200319

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      Two P3HT isomers with branched alkyl side chains, P3EBT and P3MPT, are designed and synthesized to investigate the effect of the side chains on their physicochemical and photovoltaic properties. The PSC based on P3MPT:IC70BA (2:1, w/w) exhibits a PCE of 3.62% with a high Voc of 0.91 V under the illumination of AM1.5 at 100 mW cm−2.

    9. A Convenient Route to High-Performance HDPE–CNT Conductive Nanocomposites by Control of Matrix Nucleation (pages 2275–2281)

      Fangfang Tao, Leïla Bonnaud, Oltea Murariu, Dietmar Auhl, Philippe Dubois and Christian Bailly

      Article first published online: 14 SEP 2012 | DOI: 10.1002/macp.201200477

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      A novel and convenient strategy is presented to reduce the electrical percolation threshold after matrix crystallization of melt compounded high viscosity HDPE–pristine carbon nanotubes nanocomposites. The improvement results from the presence of moderate amounts of styrene-ethylene-propylene-styrene triblock copolymer. The mechanism is investigated.

    10. Cyclometallated Pt(II) Complexes in Visible-Light Photoredox Catalysis: New Polymerization Initiating Systems (pages 2282–2286)

      Mohamad-Ali Tehfe, Lihua Ma, Bernadette Graff, Fabrice Morlet-Savary, Jean-Pierre Fouassier, Jianzhang Zhao and Jacques Lalevée

      Article first published online: 26 SEP 2012 | DOI: 10.1002/macp.201200489

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      A household halogen lamp is used to promote the ring-opening photopolymerization of epoxides in the presence of Pt(II) complexes. Excellent polymerization profiles are obtained (conversions > 70%) under this selected very soft irradiation (epoxide/acrylate interpenetrated polymer networks can also be synthesized). These Pt(II) complexes behave as photocatalysts in an oxidative cycle. The mechanisms are investigated by ESR, laser flash photolysis, and luminescence experiments.

    11. Effect of Pressure on Activation–Deactivation Equilibrium Constants for ATRP of Methyl Methacrylate (pages 2287–2292)

      Joachim Morick, Michael Buback and Krzysztof Matyjaszewski

      Article first published online: 17 SEP 2012 | DOI: 10.1002/macp.201200411

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      The ATRP rate of MMA in acetonitrile solution has been measured via VIS–NIR spectroscopy to 2500 bar. ATRP rate increases by up to two orders of magnitude without an unfavorable effect on dispersity. A comparison of activation–deactivation equilibrium constants for MMA polymerization with associated ATRP values for monomer-free model systems reveals the importance of back-strain effects in ATRP of MMA.

    12. Finely Tuned Fluorescence Emission of Polydiphenylacetylene Films Obtained by Copolymerization (pages 2293–2298)

      Wang-Eun Lee, Dong-Cheul Han, Toshikazu Sakaguchi, Yong-Bae Kim, Chang-Lyoul Lee and Giseop Kwak

      Article first published online: 24 SEP 2012 | DOI: 10.1002/macp.201200427

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      A finely tuned fluorescence emission of a diphenylacetylene polymer is achieved by copolymerization of monomers with different lengths of the alkyl side chains. A higher content of longer alkyl units in the copolymers relaxes the intramolecular stack structure, leading to a significantly enhanced blue-shift emission in the solid film.

    13. Photoresponsive Azopolyester–PMMA Block Copolymers Obtained by Combination of ATRP, Polycondensation, and “Click” Chemistry (pages 2299–2310)

      Cristina Berges, Irakli Javakhishvili, Søren Hvilsted, Carlos Sánchez and Rafael Alcalá

      Article first published online: 20 SEP 2012 | DOI: 10.1002/macp.201200414

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      Novel block copolymers (BCs) containing PMMA and azopolyester blocks of different length are synthesized by combination of polycondensation, ATRP, and “click” chemistry. Microphase separation and photo-induced optical properties of these BCs and their blends with an azopolyester homopolymer are investigated.

    14. Synthesis of Novel Bis(β-enaminoketonato)titanium Catalyst with High Activity and Excellent Ability to Copolymerize Olefins (pages 2311–2318)

      Guofan Yang, Miao Hong, Yuesheng Li and Shijun Yu

      Article first published online: 26 SEP 2012 | DOI: 10.1002/macp.201200350

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      A novel titanium catalyst [PhN=C(Ph)CHC(CF3)O]2TiCl2 has been synthesized and fully characterized on the basis of its regioisomer {[PhN=C(CF3)CHC(Ph)O]2TiCl2} reported previously. By exchanging the position of the phenyl group and trifluoromethyl group on the framework, this new catalyst exhibits excellent copolymerization ability due to its wide coordination space.

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