Macromolecular Materials and Engineering

Cover image for Vol. 294 Issue 9

September 14, 2009

Volume 294, Issue 9

Pages 547–624

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    1. Macromol. Mater. Eng. 9/2009

      Matthew D. Gawryla and David A. Schiraldi

      Version of Record online: 1 SEP 2009 | DOI: 10.1002/mame.200990014

      Thumbnail image of graphical abstract

      Cover: Low density, ice-templated aerogel composites are created using various water soluble polymers and sodium montmorillonite. The total volume of liquid absorbed is found to be strongly affected by the rigidity of the matrix and not by internal microstructure or volume. Soft matrices collapse in the presence of liquid, however, when reinforced by natural fibers, the samples retain enough integrity to create useful low density absorbent materials that may potentially be used in applications such as litter box filler. Further details can be found in the article by M. D. Gawryla and D. A. Schiraldi*on page 570.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    1. Macromol. Mater. Eng. 9/2009 (pages 547–549)

      Version of Record online: 1 SEP 2009 | DOI: 10.1002/mame.200990015

  3. Full Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Full Papers
    1. CNT Based Elastomer-Hybrid-Nanocomposites with Promising Mechanical and Electrical Properties (pages 551–560)

      Juliane Fritzsche, Hagen Lorenz and Manfred Klüppel

      Version of Record online: 13 AUG 2009 | DOI: 10.1002/mame.200900131

      Thumbnail image of graphical abstract

      Elastomer-hybrid nanocomposites based on CNTs show promising results in technologically relevant properties. The fairly good dispersion of the CNT in NR melts results in high electrical conducting materials with quite low amounts of CNT. The analysis of the dielectric spectra allows the determination of the gap distance between adjacent tubes.

    2. Influence of Layered Double Hydroxides on the Curing of Carboxylated Nitrile Rubber with Zinc Oxide (pages 561–569)

      Varun Thakur, Amit Das, Ram N. Mahaling, Sandip Rooj, Uwe Gohs, Udo Wagenknecht and Gert Heinrich

      Version of Record online: 11 AUG 2009 | DOI: 10.1002/mame.200900083

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      Layered double hydroxides (LDHs) were shown to have inhibiting influence on the formation of ionic cross-links between XNBR and ZnO. The ionic-clusters formed in XNBR matrix in the presence of ZnO were found to be suppressed with LDHs, especially in the case of unmodified LDH. A tentative sketch has been suggested where the LDHs were believed to enter into a coordination complex, thus, leading to some kind of dissolution effect in ionic-clusters formed between XNBR and ZnO.

    3. Novel Absorbent Materials Created via Ice Templating (pages 570–574)

      Matthew D. Gawryla and David A. Schiraldi

      Version of Record online: 11 AUG 2009 | DOI: 10.1002/mame.200900094

      Thumbnail image of graphical abstract

      Low-density, ice-templated aerogel composites were created using various water-soluble polymers and sodium montmorillonite. The total volume of liquid absorbed was found to be strongly affected by the rigidity of the matrix and not by internal microstructure or volume. Soft matrices collapsed in the presence of liquid; however, when reinforced by natural fibers, the samples retained enough integrity to create useful low-density absorbent materials.

    4. Morphology Modification of Polyethylene/Clay Nanocomposite Samples under Convergent Flow (pages 575–581)

      Francesco Paolo La Mantia, Rosamaria Marino and Nadka Tzankova Dintcheva

      Version of Record online: 4 AUG 2009 | DOI: 10.1002/mame.200900066

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      The morphology of PE/clay nanocomposite samples subjected to convergent flows, the intensity of which is varied by using capillaries of different diameters and length-to-diameter ratios, is studied. The applied convergent flow, at the entrance of the capillary, is able to change the clay morphology and, consequently, the final material properties of the polyethylene/clay system, which has limited affinity between the matrix and organo-modified clay particles.

    5. Dispersion of TiO2 Particles in PET/PP/TiO2 and PET/PP/PP-g-MA/TiO2 Composites Prepared with Different Blending Procedures (pages 582–589)

      Wenjing Li, József Karger-Kocsis and Alois K. Schlarb

      Version of Record online: 21 JUL 2009 | DOI: 10.1002/mame.200900123

      Thumbnail image of graphical abstract

      TiO2 particles (300 nm in diameter) were incorporated into PET/PP blends in presence (or absence) of PP-g-MA using four different blending procedures. Depending on the blending procedure and the incorporation of PP-g-MA, the TiO2 particles are preferentially located in one particular phase (PET or PP phase) or at the PET/PP interface.

    6. Novel Thermosets from the Cationic Copolymerization of Modified Linseed Oils and Dicyclopentadiene (pages 590–598)

      Ying Xia, Phillip H. Henna and Richard C. Larock

      Version of Record online: 11 AUG 2009 | DOI: 10.1002/mame.200900060

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      A series of soft to tough thermosets containing 57–97wt.-% biorenewable materials have been prepared. The Tgs of the resulting Dil/DCPD and ML189/DCPD copolymers fall in the range 1583C and 877C, respectively. The room-temperature storage moduli increase with increasing amount of DCPD and range from 4.43 to 1520 MPa for the Dil/DCPD copolymers and 3.72 to 1440 MPa for the ML189/DCPD copolymers. TGA indicates that these biocopolymers are thermally stable up to 150C.

    7. Preparation of a Poly(furfuryl alcohol)-Coated Highly Porous Polystyrene Matrix (pages 599–604)

      Olivier Lépine, Marc Birot and Hervé Deleuze

      Version of Record online: 13 AUG 2009 | DOI: 10.1002/mame.200900102

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      Porous poly(styrene-co-divinylbenzene) monoliths have been obtained by polymerisation of the continuous phase of a high-internal-phase emulsion. Then, a poly(furfuryl alcohol) coating was generated onto the matrix surface by furfuryl alcohol vapour deposition, followed by acid-catalysed polycondensation. Compression experiments indicated a remarkable improvement in the mechanical properties, as compared with non-coated matrix with similar porosity.

    8. Synthesis and Characterization of Novel Polyurethane Composites Based on Hybrid Inorganic/Organic Phosphazene-Containing Microspheres (pages 605–610)

      Yubo Zhou, Xiaobin Huang, Xiaoqi Kang, Jianwei Fu, Yan Zhu and Xiaozhen Tang

      Version of Record online: 13 AUG 2009 | DOI: 10.1002/mame.200900161

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      The fabrication of composites from polyurethanes and cyclomatrix phosphazene-containing nanotubes (including carbon nanotubes), nanofibers, and microspheres is described. Their structures are elucidated using FT-IR spectroscopy and SEM, and their thermal and mechanical properties are studied using DSC, TGA and tensile measurements. The work is possible to exploit a novel series of PU nano-/microcomposites.

    9. Electrospun Composite Mats of Poly[(D,L-lactide)-co-glycolide] and Collagen with High Porosity as Potential Scaffolds for Skin Tissue Engineering (pages 611–619)

      Ye Yang, Xinli Zhu, Wenguo Cui, Xiaohong Li and Yan Jin

      Version of Record online: 23 JUL 2009 | DOI: 10.1002/mame.200900052

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      Highly porous electrospun fibrous mats of PLGA and collagen were investigated as potential tissue engineering scaffolds. Collagen molecules with a triple-helix structure were confirmed to be on the fibers surface. Fibroblasts derived from GFP transgenic C57BL/6 mice were used to directly observe the cell proliferation, showing that the inoculation of collagen enhanced cell attachment, proliferation and extracellular matrix secretion.

    10. Well-Controlled Microcellular Biodegradable PLA/Silk Composite Foams Using Supercritical CO2 (pages 620–624)

      Dong Jin Kang, Deng Xu, Zhen Xiu Zhang, Kaushik Pal, Dae Suk Bang and Jin Kuk Kim

      Version of Record online: 14 AUG 2009 | DOI: 10.1002/mame.200900103

      Thumbnail image of graphical abstract

      Supercritical CO2was used to foam biodegradable PLA composites reinforced with silk fibroin in CH2Cl2 solution. The obtained foams showed smaller cells and a higher cell density as compared to pure PLA foams. The influence of silk contents on foam properties were studied using SEM, XRD and DSC, the image showing an FE-SEM micrograph of the freeze fracture surface of a PLA/silk fibroin foam.

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