Macromolecular Chemistry and Physics

Cover image for Vol. 213 Issue 23

December 13, 2012

Volume 213, Issue 23

Pages 2437–2556

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Talents & Trends
    6. Full Papers
    1. Macromol. Chem. Phys. 23/2012 (page 2437)

      Wenpeng Lin, Huibin Sun, Shujuan Liu, Huiran Yang, Shanghui Ye, Wenjuan Xu, Qiang Zhao, Xiangmei Liu and Wei Huang

      Version of Record online: 17 DEC 2012 | DOI: 10.1002/macp.201290077

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      Front Cover: The picture presents a memory material of a conjugated polymer with an on-chain Pt(II) complex, the structure of such a memory device, and its current–voltage characteristics. This kind of resistive random-access memory material and device has promising practical application in data-storage devices, such as computers. Further details can be found in the article by W. P. Lin, H. B. Sun, S. J. Liu, H. R. Yang, S. H. Ye, W. J. Xu, Q. Zhao,* X. M. Liu, and W. Huang* on page 2472.

  2. Masthead

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Talents & Trends
    6. Full Papers
    1. Macromol. Chem. Phys. 23/2012

      Version of Record online: 17 DEC 2012 | DOI: 10.1002/macp.201290078

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Talents & Trends
    6. Full Papers
  4. Talents & Trends

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Talents & Trends
    6. Full Papers
    1. New Applications of Photolabile Nitrobenzyl Groups in Polymers (pages 2443–2449)

      Samuel W. Thomas III

      Version of Record online: 22 OCT 2012 | DOI: 10.1002/macp.201200486

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      New approaches to photoresponsive materials with nitrobenzyl esters are described using conjugated polymers and polyelectrolyte multilayer films that respond to UV light. Photocleavage of cations from polyelectrolytes in layer-by-layer (LbL) films disrupts their integrity, while conjugated materials with nitrobenzyl pendants show photochemically controlled fluorescence efficiency and solubility.

  5. Full Papers

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Talents & Trends
    6. Full Papers
    1. Multiresponsive Properties of Triple-Shell Architectures with Poly(N,N-diethylaminoethyl methacrylate), Poly(N-vinylcaprolactam), and Poly(N,N-dimethylaminoethyl methacrylate) as Building Blocks (pages 2450–2463)

      Wei Tian, Xiaoyan Lv, Longbiao Huang, Nazakat Ali and Jie Kong

      Version of Record online: 18 SEP 2012 | DOI: 10.1002/macp.201200283

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      Multiresponsive triple-shell architectures with poly(N,N-diethylaminoethyl methacrylate), poly(N-vinylcaprolactam), and poly(N,N-dimethylaminoethyl methacrylate) as building blocks have been synthesized. This novel polymer system possesses pH-responsiveness at pH 12.5 in aqueous solution under room temperature, followed by double-temperature-responsiveness between 33 °C and 36 °C.

    2. The Scaling Law between Molecular Mass and Diffusivity and its Influence on the Molecular Weight Distribution as Derived from a Stretched Exponential PGSTE NMR Response Curve (pages 2464–2471)

      Xiaoliang Gong, E. W. Hansen and Qun Chen

      Version of Record online: 4 OCT 2012 | DOI: 10.1002/macp.201200372

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      If assuming the PGSTE NMR response curve of a polymer (in solution) to have a stretched exponential shape: I(t) = exp [(− D0t)β], it is shown that the resulting molecular weight distribution characteristics (of the polymer) are related to β and the parameter α of the scaling law (D = KM−α) between diffusivity (D) and molecular mass (M), as illustrated by the dependence of the distribution width σILT on α and β.

    3. Conjugated Polymer with On-Chain Pt(II) Complex for Resistive Random-Access Memory Device (pages 2472–2478)

      Wenpeng Lin, Huibin Sun, Shujuan Liu, Huiran Yang, Shanghui Ye, Wenjuan Xu, Qiang Zhao, Xiangmei Liu and Wei Huang

      Version of Record online: 24 SEP 2012 | DOI: 10.1002/macp.201200465

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      A novel conjugated polymer containing Pt(II) complex on the main chain acts as an active layer in the sandwich structure of an Al/polymer/ITO device, which achieves resistive random-access memory with a low threshold voltage, excellent stability, and a high ON/OFF current ratio. The memory mechanism of the device has been investigated and assigned to the formation and dissociation of a charge-transfer state under the applied voltage.

    4. Penultimate Unit and Solvent Effects on 2:1 Sequence Control During Radical Copolymerization of N-Phenylmaleimide With β-Pinene (pages 2479–2485)

      Daisuke Yamamoto and Akikazu Matsumoto

      Version of Record online: 17 DEC 2012 | DOI: 10.1002/macp.201200421

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      Copolymers with a 2:1 regulated sequence of N-phenylmaleimide with β-pinene units (AAB-type repeating units) are produced during radical copolymerization. The monomer reactivity ratios vary depending on the solvent used and the copolymerization temperature due to the interaction of the PhMI repeating units with solvents.

    5. Synthesis of a Bifunctional Fluorescent Polymer for Cell Imaging and Enzyme Detection (pages 2486–2491)

      Quanshan Wen, Chunlei Zhu, Libing Liu, Qiong Yang, Shu Wang and Daoben Zhu

      Version of Record online: 27 SEP 2012 | DOI: 10.1002/macp.201200419

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      A new cationic conjugated polyfluorene derivative (PFPBOH) containing phenylboronic acid group has been synthesized and characterized. The polymer not only is advantageous to cell imaging by forming cyclic esters with adjacent diols on cell membrane, but is also capable of enzyme detection through a fluorescence “turn off” mechanism. These findings exhibit great potential for developing multifunctional polymer materials for simultaneous imaging and detection.

    6. Tunable Surface Nanoporosity by Electropolymerization of N-Alkyl-3,4-ethylenedioxypyrroles With Different Alkyl Chain Lengths (pages 2492–2497)

      Thierry Darmanin and Frédéric Guittard

      Version of Record online: 22 OCT 2012 | DOI: 10.1002/macp.201200329

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      The alkyl chain length of substituted 3,4-ethylenedioxypyrrole (EDOP) containing hydrocarbon chain has a very influence on the presence of nanoporosity in the electrodeposited conducting polymer films and can lead to exceptional superhydrophobic properties. Moreover, the presence of surface nanoporosity is in correlation with steric hindrances induced by the alkyl chains during electrodeposition.

    7. Polymer-Grafted Silicon Nanoparticles Obtained Either via Peptide Bonding or Click Chemistry (pages 2498–2503)

      Vincent Maurice, Cedric Slostowski, Nathalie Herlin-Boime and Geraldine Carrot

      Version of Record online: 4 OCT 2012 | DOI: 10.1002/macp.201200326

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      Two versatile methods are studied for the efficient grafting of poly(ethylene glycol) chains onto silicon nanoparticles. Peptide-type coupling and copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC, click chemistry) are both conducted, evaluated, and compared. This work raises interesting issues for the preparation of biocompatible fluorescent nano- tracers.

    8. Polyelectrolyte Complexes: Phase Diagram and Intrinsic Viscosities of the System Water/Poly(2-vinylpyridinium-Br)/Poly(styrene sulfonate-Na) (pages 2504–2513)

      Maria Bercea, Loredana-Elena Nita, John Eckelt and Bernhard A. Wolf

      Version of Record online: 9 OCT 2012 | DOI: 10.1002/macp.201200445

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      It is demonstrated that the formation of polyelectrolyte complexes on a colloidal level—typical for sufficiently concentrated solutions—is at low polymer concentration and in the absence of extra salt preceded by liquid/liquid phase separation. Viscosity measurements disclose that the formation of soluble polyelectrolyte complexes may take up to hours. The intrinsic viscosities of the blend pass a minimum as a function of its composition.

    9. Self-Assembly of Amphiphilic Block Copolymers in Ternary Solvent Mixtures: Lyotropic Liquid Crystalline Phase Behavior and Structure (pages 2514–2528)

      Biswajit Sarkar, Jinendra Lakshmichand and Paschalis Alexandridis

      Version of Record online: 5 OCT 2012 | DOI: 10.1002/macp.201200438

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      Addition to water of a mixture of two organic solvents results in decreasing stability of lyotropic liquid crystal phases formed by aqueous PEO–PPO–PEO block copolymers. Part of the organic solvent locates in the PPO domains and weakens block segregation, but the ternary solvents remain selective for PEO. The lattice parameters for block copolymers scale as (polymer molecular weight)1/2.

    10. Synthesis and Photovoltaic Properties of a Donor-Acceptor Copolymer of Dithienosilole and 5,6-Bis(octyloxy)benzo[1,2,5]thiadiazole (pages 2529–2535)

      Youguang Huang, Maojie Zhang, Yan Jing, Huili Fan, Xia Guo and Yongfang Li

      Version of Record online: 4 OCT 2012 | DOI: 10.1002/macp.201200333

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      A donor-acceptor copolymer, PDTSDOBT, based on dithienosilole and 5,6-bis(octyloxy)benzo[1,2,5]thiadiazole is synthesized for application as a donor material in polymer solar cells (PSCs). The power conversion efficiency of a PSC based on PDTSDOBT:PC70BM (1:2 w/w) was 3.51% with Jsc = 8.96 mA cm−2, Voc = 0.69 V, and FF = 0.568, under the illumination of AM1.5G at 100 mW cm−2.

    11. Poly(acrylic acid) Undergoes Partial Esterification During RAFT Synthesis in Methanol and Interchain Disulfide Bridging Upon NaOH Treatment (pages 2536–2540)

      Jeisa M. Pelet and David Putnam

      Version of Record online: 4 OCT 2012 | DOI: 10.1002/macp.201200528

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      Poly(acrylic acid) is synthesized by RAFT polymerization in a controlled fashion. When the polymerization is conducted in methanol, partial esterification of the polymer side chains is produced by the solvent. Ways to overcome this undesired side reaction and achieve pure acrylic acid homopolymers are herein reported.

    12. Thermoplastic Poly(urethane urea)s From Novel, Bio-based Amorphous Polyester Diols (pages 2541–2549)

      Donglin Tang, Bart A. J. Noordover, Rafael J. Sablong and C. E. Koning

      Version of Record online: 5 OCT 2012 | DOI: 10.1002/macp.201200397

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      Novel thermoplastic polyurethanes (TPU) based on two novel amorphous polyester diols are compared with TPUs containing conventional polydiols. When selecting the proper hard segment length, the TPUs based on the amorphous polyesters exhibit comparable thermal and mechanical properties to their conventional counterparts and show potential for biodegradation.

    13. Covalent Attachment of Gold Nanoparticles to Surfaces and Polymeric Substrates Using UV Light (pages 2550–2556)

      Peter J. Roth and Patrick Theato

      Version of Record online: 22 OCT 2012 | DOI: 10.1002/macp.201200485

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      Gold nanoparticles carrying UV-reactive benzophenone groups were covalently bound to polycarbonate, silica microspheres, and filter paper. This contact-free attachment method allows for the preparation of a variety of nanocomposites, such as core–shell particles incorporating polyaddition-type polymers, or gold-decorated silica particles. Patterned surfaces can be achieved through photolithography.

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