Macromolecular Rapid Communications

Cover image for Vol. 31 Issue 22

November 15, 2010

Volume 31, Issue 22

Pages 1919–1997

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Reviews
    5. Communications
    1. Macromol. Rapid Commun. 22/2010

      Takamasa Sakai, Yuki Akagi, Takuro Matsunaga, Manami Kurakazu, Ung-il Chung and Mitsuhiro Shibayama

      Article first published online: 9 NOV 2010 | DOI: 10.1002/marc.201090059

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      Cover: The picture presents the gelation process of a near-ideal polymer network. This network, the Tetra network, is synthesized by cross-end-coupling of mutually reactive tetra-arm precursors. The Tetra network exhibits an extremely homogeneous network structure resulting in high mechanical strength. Further information can be found in the article by T. Sakai,* Y. Akagi, T. Matsunaga, M. Kurakazu, U. I. Chung, and M. Shibayama on page 1954.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Reviews
    5. Communications
    1. Macromol. Rapid Commun. 22/2010 (pages 1919–1922)

      Article first published online: 9 NOV 2010 | DOI: 10.1002/marc.201090060

  3. Reviews

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Reviews
    5. Communications
    1. Synthesis of Poly(lactide)s with Modified Thermal and Mechanical Properties (pages 1923–1937)

      Jan M. Becker, Ryan J. Pounder and Andrew P. Dove

      Article first published online: 9 NOV 2010 | DOI: 10.1002/marc.201000088

      Thumbnail image of graphical abstract

      This paper reports the methods that have been employed to enable enhancement of the physical and mechanical properties of polylactides via the synthetic manipulation of the polymer structure using ring-opening polymerization techniques. Block copolymer synthesis and modification of the lactide monomer structure and the resultant effect of these structural modifications on the properties of the materials are reported.

    2. A Road Less Traveled to Functional Polymers: Epoxide Termination in Living Carbanionic Polymer Synthesis (pages 1938–1947)

      Christoph Tonhauser and Holger Frey

      Article first published online: 20 SEP 2010 | DOI: 10.1002/marc.201000353

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      Epoxide derivatives are a highly promising class of compounds for the functionalization of living anionic polymers. They may not only introduce one single hydroxyl, but also multiple functionalities. Macromolecular engineering, industrial applications, and a novel continuous reaction strategy for the rapid synthesis of different end-functional polymers are presented.

  4. Communications

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Reviews
    5. Communications
    1. Helical Mechanoclinic Deformation of Main-Chain Chiral Smectic Elastomers (pages 1948–1953)

      Tohru Tashiro, Yui Kondo and Kazuyuki Hiraoka

      Article first published online: 24 SEP 2010 | DOI: 10.1002/marc.201000455

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      This manuscript presents chiral coupling between tilt and twist for the helical mechanoclinic deformation of a main-chain chiral smectic elastomer. An X-ray analysis reveals that the twist deformation induces a layer tilt angle that depends on the handedness of twist. The layer tilt angle θL in the right-handedly twisted elastomer is larger than that of the left-handedly twisted elastomer.

    2. Highly Elastic and Deformable Hydrogel Formed from Tetra-arm Polymers (pages 1954–1959)

      Takamasa Sakai, Yuki Akagi, Takuro Matsunaga, Manami Kurakazu, Ung-il Chung and Mitsuhiro Shibayama

      Article first published online: 7 SEP 2010 | DOI: 10.1002/marc.201000286

      Thumbnail image of graphical abstract

      An “ideal” network is a polymer network consisting of an infinite series of uniform meshes connected by cross-links without any inhomogeneities. Here, we show a near-ideal polymer network, the Tetra network, made by cross-end-coupling of tetra-arm polymer modules. The homogeneity of the Tetra network should help apply the knowledge of single polymer chains seamlessly to the design of polymer materials and help further develop the theory of rubber elasticity.

    3. Block Copolymer Directed Nanoporous Metal Thin Films (pages 1960–1964)

      Hitesh Arora, Zihui Li, Hiroaki Sai, Marleen Kamperman, Scott C. Warren and Ulrich Wiesner

      Article first published online: 16 AUG 2010 | DOI: 10.1002/marc.201000275

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      We report on direct access to nanoporous metal thin films using block copolymer self-assembly. Nanostructured metal nanoparticle hybrid thin films with high nanoparticle loadings were generated through spin coating of a mixture of block copolymer and ligand stabilized platinum and palladium nanoparticles. Plasma cleaning to remove the organics results in a conductive metal thin film. We expect that the methods described here can be generalized to other metals, mixtures of metal nanoparticles and intermetallics.

    4. Alternating Poly(Pt-salphen)-(p-phenyleneethynylene) as Phosphorescent Conjugated Linear-Rod and Coilable Sensory Materials (pages 1965–1969)

      Shenmei Sun, Wah-Leung Tong and Michael C.W. Chan

      Article first published online: 7 SEP 2010 | DOI: 10.1002/marc.201000266

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      Phosphorescent conjugated polymers consisting of alternatingp-phenylene-ethynylene and ‘para-’ or ‘meta-type’ Pt(II)-salphen luminophore units display contrasting emission properties that are dependent on the side-arm substituents and chemical structure, polymer conformation and degree of π-stacking interactions. Selectivity for Cu2+ is apparent in luminescent sensing of metal ions.

    5. A Practical Approach to the Development of Inkjet Printable Functional Ionogels—Bendable, Foldable, Transparent, and Conductive Electrode Materials (pages 1970–1976)

      Joseph T. Delaney Jr., Albert R. Liberski, Jolke Perelaer and Ulrich S. Schubert

      Article first published online: 20 SEP 2010 | DOI: 10.1002/marc.201000336

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      Conductive, colorless, and highly transparent thin films of ionogels were prepared by using PEG-DMA and an ionic liquid. The resulting films showed an optical transparency >94% from near-UV to near-IR and a resistivity of 12.4 Ω · m. These ionogel films may find applications as transparent, flexible conductors for electronic applications.

    6. Real-Time IR Study of Ultra-Thin Film Photopolymerization of Liquid Porphyrin Monomer (pages 1977–1980)

      Kalle Lintinen, Niko Granqvist, Alexander Efimov and Helge Lemmetyinen

      Article first published online: 20 SEP 2010 | DOI: 10.1002/marc.201000315

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      By using an advanced PM-IRRAS device it is possible to study the photopolymerization of an ultrathin layer of a porphyrin monomer in real time. The method can be compared with the indirect UV/Vis method previously introduced by our group. With PM-IRRAS it is possible to analyze polymerization kinetics of photopolymerization at various temperatures to determine the activation energy of the reaction.

    7. High-Yield Fabrication of PLGA Non-Spherical Microarchitectures by Emulsion-Solvent Evaporation Method (pages 1981–1986)

      Ruifeng Li, Xuemin Li, Lingrong Liu, Zhimin Zhou, Hongbo Tang and Qiqing Zhang

      Article first published online: 8 OCT 2010 | DOI: 10.1002/marc.201000332

      Thumbnail image of graphical abstract

      PLGA non-spherical microarchitectures fabricated by modified oil-in-water emulsion-solvent evaporation method: oil phase droplets were coated with PVA membranes when entering aqueous phase; droplets were stretched, coalesced and fused partially into rods or directly stretched into fibers in shearing flow while solvent evaporating; finally, solidified and deformed particles were obtained.

    8. Discrete Dipole Moments and Enhanced Electro-Rheological Properties of Dumbbell-Shaped, Non-Spherical Particles (pages 1987–1991)

      Kyomin Shin, Sunmi Lee, Jin-Joo Kim and Kyung-Do Suh

      Article first published online: 20 SEP 2010 | DOI: 10.1002/marc.201000302

      Thumbnail image of graphical abstract

      Non-spherical particles have been synthesized and the electrorheology properties investigated as a result the particle morphology. Compared with the ER properties of spherical particles, the yield stress of the non-spherical particle was five times as high because of the discrete dipole moment attributable to the non-spherical morphology.

    9. Polynorbornenes Containing Ferrocene Derivatives and Alkyne-bis(tricarbonylcobalt) (pages 1992–1997)

      Alaa S. Abd-El-Aziz, Diana J. Winram, Patrick O. Shipman and Lukas Bichler

      Article first published online: 7 OCT 2010 | DOI: 10.1002/marc.201000395

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      Coordination of bis(tricarbonylcobalt) to alkyne moieties in organoiron norbornene complexes afforded mixed transition metal complexes available for ROMP. Polymerization with Grubbs' catalyst gave mixed organoiron/organocobalt polynorbornenes. SEM showed that the polymers had fine globular morphologies.

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