Macromolecular Chemistry and Physics

Cover image for Vol. 214 Issue 21

November 2013

Volume 214, Issue 21

Pages 2381–2507

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      Macromol. Chem. Phys. 21/2013 (page 2381)

      Daniel Wenzlik and Rudolf Zentel

      Article first published online: 4 NOV 2013 | DOI: 10.1002/macp.201370073

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      Front Cover: Cholesteric films made of liquid-crystalline cellulose derivatives with improved optical properties are prepared. Careful choice of the solvent, hydrogen bond influencing additives, the synthetic realization of a very high degree of substitution on the cellulosic polymer, and the use of mechanical stirring in combination with a tuned substrate treatment and film-preparation method and subsequent polymerization allow the fabrication of free standing cholesteric films of high optical quality. Further details can be found in the article by D. Wenzlik and R. Zentel* on page 2405.

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    1. Masthead: Macromol. Chem. Phys. 21/2013

      Article first published online: 4 NOV 2013 | DOI: 10.1002/macp.201370074

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    1. Contents: Macromol. Chem. Phys. 21/2013 (pages 2383–2386)

      Article first published online: 4 NOV 2013 | DOI: 10.1002/macp.201370075

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    1. Macromol. Chem. Phys. 21/2013 (page 2387)

      Article first published online: 4 NOV 2013 | DOI: 10.1002/macp.201370076

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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. Near-Infrared Photovoltaic Performance of Conjugated Polymers Containing Thienoisoindigo Acceptor Units (pages 2388–2397)

      Makoto Karakawa and Yoshio Aso

      Article first published online: 17 OCT 2013 | DOI: 10.1002/macp.201300426

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      NIR-absorbing donor–acceptor-type polymers containing the thienoisoindigo unit are synthesized. The UV–vis spectra of the polymers show features that extended up to 1200 nm in the NIR. The organic photovoltaic cells using the synthesized polymers show a photocurrent response in the NIR with power conversion efficiency up to 0.52% under AM 1.5 photo irradiation.

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    1. Hydrophilic–Hydrophobic-Transition-Triggered Thermosensitive Macroscopic Gel Assembly (pages 2398–2404)

      Yan Peng, Zong-Chun Wang, Xiao-Ding Xu and Jin-Chun Song

      Article first published online: 18 SEP 2013 | DOI: 10.1002/macp.201300445

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      Poly(N-isopropylacrylamide) (PNIPAAm)-based host and guest gels with macroscopic self-assembly behaviors are designed and prepared. Due to the temperature-dependent reversible transition from extended PNIPAAm-based chains to aggregated ones, a hydrophilic–hydrophobic transition-triggered reversible thermosensitive macroscopic gel assembly can be realized.

    2. High Optical Quality Films of Liquid Crystalline Cellulose Derivatives in Acrylates (pages 2405–2414)

      Daniel Wenzlik and Rudolf Zentel

      Article first published online: 6 SEP 2013 | DOI: 10.1002/macp.201300354

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      The systematic composition tuning of a lyotropic mixture of cellulose derivatives in acrylates, the use of hydrogen bonds mediating additives, and an improved preparation method yield films with outstanding optical quality before and after their polymerization. Organic dyes are incorporated by two different methods toward the application of mirrorless lasing devices.

    3. Isotactic Polypropylene/Multi-Walled Carbon Nanotube Nanocomposites: The Effect of Modification of MWCNTs on Mechanical Properties and Melt Crystallization (pages 2415–2431)

      George Z. Papageorgiou, Maria Nerantzaki, Ifigeneia Grigoriadou, Dimitrios G. Papageorgiou, Konstantinos Chrissafis and Dimitrios Bikiaris

      Article first published online: 18 SEP 2013 | DOI: 10.1002/macp.201300355

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      The modification of multi-walled carbon nanotubes (MWCNTs) is employed in iPP/MWCNT nanocomposites to increase the dispersion, the quality of adhesion and the nucleating activity of the MWCNTs. Thus, tensile tests, isothermal and non-isothermal crystallization are performed for all nanocomposites and the results show that each surface modification of MWCNTs induces a different effect on the mechanical properties of the samples.

    4. Determination of Poly(4,4′-diphenylsulfonyl terephthalamide) Crystalline Structure Via WAXD and Molecular Simulations (pages 2432–2438)

      Yumei Zhang, Huaping Wang, Shenghui Chen, Xiaofeng Wang, Dufei Fang, Christian Burger, Justin Che, Xiaowei Li and Benjamin S. Hsiao

      Article first published online: 6 AUG 2013 | DOI: 10.1002/macp.201300369

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      A 2/1 helical geometry of pt-PSA molecule in crystal phase with the periodicity 3.01 ± 0.02 nm is determined by wide-angle X-ray diffraction (WAXD) and molecular simulation. A monoclinic unit cell for pt-PSA with the dimensions of a = 0.645 nm, b = 0.488 nm, c = 3.010 nm, and γ = 122.5° is suggested. A layer structure is formed in the crystal phase and is stabilized by the hydrogen bond between [BOND]NH and [BOND]C[DOUBLE BOND]O and the parallel-displaced π–π stacking from the distortional coplanar of benzene rings and amide group.

    5. Graphene-Functionalized Carbon Nanotubes for Conducting Polymer Nanocomposites and Their Improved Strain Sensing Properties (pages 2439–2444)

      Varrla Eswaraiah, S. S. Jyothirmayee Aravind, Krishnan Balasubramaniam and Sundara Ramaprabhu

      Article first published online: 9 AUG 2013 | DOI: 10.1002/macp.201300242

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      A unique type of graphene wrapping over carbon nanotubes (CNTs) is achieved by chemical vapour deposition (CVD) and the same is used to prepare polymer nanocomposite films. A better and high strain gauge factor of ≈20 is obtained with conducting graphene wrapped CNTs based PVDF composites whereas the gauge factor is ≈2 with OH/COOH–CNT based PVDF composites.

    6. Fabrication of Electrospinning Fibers from Spiropyran-Based Polymeric Nanowires and their Photochromic Properties (pages 2445–2453)

      Wen-Jian Zhang, Chun-Yan Hong and Cai-Yuan Pan

      Article first published online: 5 AUG 2013 | DOI: 10.1002/macp.201300428

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      Photochromic fibers are fabricated from photochromic nanowires by the electrospinning method, and the fluorescence of both nanowires and fibers can be switched on and off upon alternating UV and visible-light irradiation.

    7. Influence of Chemical Structure on the Refractive Index of Imide-Type Polymers (pages 2454–2464)

      Irina Butnaru, Maria Bruma, Thomas Kopnick and Joachim Stumpe

      Article first published online: 5 AUG 2013 | DOI: 10.1002/macp.201300309

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      The influence of various substituents on the refractive index value of two series of imide-type polymers is analyzed. Thus, the effect of the amide unit and the benzonitrile position in poly(amide imide)s and the presence of tetrabromo substituents and of flexible linkages in polyimides series are evaluated.

    8. Multi-Shape-Memory Property Study of Novel Poly(ε-Caprolactone)/Ethyl Cellulose Polymer Networks (pages 2465–2472)

      Yongkang Bai, Cheng Jiang, Qihua Wang and Tingmei Wang

      Article first published online: 7 AUG 2013 | DOI: 10.1002/macp.201300389

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      Two graft copolymers with different chain lengths of poly(ε-caprolactone) are synthesized by grafting poly(ε-caprolactone) onto ethyl cellulose through ring-opening polymerization. Then, three methods are adopted to combine two graft copolymers together to prepare polymer networks that are capable of showing triple-shape-memory effects.

    9. Synthesis and Photovoltaic Performance of a [1,2,3]Triazolo[4,5-g]quinoxaline-Based Low-Bandgap Polymer (pages 2473–2479)

      Jiefeng Hai, Baofeng Zhao, Enwei Zhu, Linyi Bian, Hongbin Wu and Weihua Tang

      Article first published online: 20 AUG 2013 | DOI: 10.1002/macp.201300349

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      An alternating [1,2,3]triazolo[4,5-g]quinoxaline and 9,9-didodecyl-fluorene narrow-bandgap polymer is prepared. With a bandgap of 1.63 eV, this polymer exhibits wide absorption ranging from 300–760 in film. Bulk heterojunction solar cells fabricated by blending the polymer with PC71BM exhibit a maximum power conversion efficiency of 1.31%.

    10. Probing the Surface Swelling in Ultra-Thin Supported Polystyrene Films During Case II Diffusion of n-Hexane (pages 2480–2488)

      Wojciech Ogieglo, Herbert Wormeester, Matthias Wessling and Nieck E. Benes

      Article first published online: 9 AUG 2013 | DOI: 10.1002/macp.201300371

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      In situ time-resolved spectroscopic ellipsometry is used to study the dynamics of n-hexane diffusion into ultra-thin polystyrene films. It is found that a finite thickness region of 14 ± 3 nm exists in the outer film interface that is almost instantly swollen after contact with the penetrant. The thickness of this fast swelling layer is found to be independent of the swelling temperature and the physical aging time.

    11. Synthesis of Telechelic Poly(ether sulfone) Oligomers by Chain-Growth Condensation Polymerization (pages 2489–2499)

      Abdelkader Benhalima, Alexandra Furtos and Josée Brisson

      Article first published online: 20 AUG 2013 | DOI: 10.1002/macp.201300397

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      Synthesis of homotelechelic aromatic ether sulfone oligomers is proposed. Based on chain-growth polycondensation, the resulting oligomers have low molecular weights (inline image = 1000–3000 g mol−1) and low polydispersities (1.1–1.3), although the reaction is not perfectly controlled. Methoxy end groups readily react in a number of reactions, and are useful as building blocks for copolymers.

    12. One-Pot Synthesis of Polyester–Polyolefin Copolymers by Combining Ring-Opening Polymerization and Carbene Polymerization (pages 2500–2506)

      Longqiang Xiao, Liqiong Liao, Xin Guo and Lijian Liu

      Article first published online: 20 AUG 2013 | DOI: 10.1002/macp.201300412

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      The first example of metal-free copolymerization of carbene polymerization and ring-opening polymerization under microwave irradiation is reported.

  7. Correction

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Contents
    5. Frontispiece
    6. Special Article Series-Full Papers
    7. Full Papers
    8. Correction
    1. Novel Cyclopentadithiophene-Based D–A Copolymers for Organic Photovoltaic Cell Applications (page 2507)

      Fedor V. Drozdov, Ekaterina N. Myshkovskaya, Diana K. Susarova, Pavel A. Troshin, Olga D. Fominykh, Marina Yu. Balakina, Artem V. Bakirov, Maxim A. Shcherbina, Jinwoo Choi, Denis Tondelier, Mikhail I. Buzin, Sergei N. Chvalun, Abderrahim Yassar and Sergei A. Ponomarenko

      Article first published online: 4 NOV 2013 | DOI: 10.1002/macp.201370328

      This article corrects:

      Novel Cyclopentadithiophene-Based D–A Copolymers for Organic Photovoltaic Cell Applications

      Vol. 214, Issue 19, 2144–2156, Article first published online: 29 JUL 2013

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