Macromolecular Materials and Engineering

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Recently Published Articles

  1. Preparation of Chain-Extended Poly(hexamethylene carbonate)s and their Block Copolymerization with Poly-L-lactide to Synthesize Partly Biobased Thermoplastic Elastomers

    Koji Kobayashi, Shuhei Kanmuri, Yuichiro Hayashi, Kazunari Masutani and Yoshiharu Kimura

    Article first published online: 10 JUL 2014 | DOI: 10.1002/mame.201400098

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    Poly(hexamethylene carbonate) diol (PHMC) synthesized by the reaction of the diol and ethylene carbonate is found to contain several minor units. It is chain-extended and used for preparing tri-block copolymers of poly-L-lactide and PHMC, which are confirmed to have potential applicability as biobased thermoplastic elastomers.

  2. An Acrylic Latex Filled with Zinc Oxide by Miniemulsion Polymerization as a Protective Coating for Stones

    Chiara Letizia Serra, Jean-Marc Tulliani and Marco Sangermano

    Article first published online: 8 JUL 2014 | DOI: 10.1002/mame.201400074

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    This paper deals with an acrylic latex filled with zinc oxide synthesized by miniemulsion polymerization for stone protection. Field emission scanning electron microscopy (FE-SEM) observations of fracture surfaces of the latex films ZnO, show a homogeneous distribution of particles in the polymer matrix. The particle dimensions range from 150 to 400 nm, indicating the absence of macro-clusters, in agreement with dynamic light scattering results.

  3. Flow Induced Crystallization of Poly(ether-block-amide) from the Microinjection Molding Process and its Effect on Mechanical Properties

    Nan Zhang, Seong Ying Choi and Michael D. Gilchrist

    Article first published online: 8 JUL 2014 | DOI: 10.1002/mame.201300459

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    Flow induced crystallization during microinjection molding is measured by shear stress and specific work. Shear stress is shown to be a successful threshold to predict the formation of oriented structures under the high shear rate and fast cooling rate conditions used in manufacturing industries. Having such highly oriented structures within the skin layer causes a significant effect on mechanical properties.

  4. Preparation of Polyesteramides in a Reactive Extrusion Process

    Manisha Gupta, Felixine Siegmund, Edmund Haberstroh, Martin Rosenthal, Dimitri A. Ivanov, Martin W. M. Fijten, Xiaomin Zhu and Martin Möller

    Article first published online: 7 JUL 2014 | DOI: 10.1002/mame.201400091

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    Poly(ϵ-caprolactone-co-ϵ-caprolactam) segmented block copolymers are synthesized with almost qualitative monomer conversion via anionic ring-opening polymerization of ϵ-caprolactam in the polycaprolactone melt in a co-rotating twin-screw microcompounder with conic screws. The influence of initiator and activator concentration as well as the ester/amide ratio on the structure and properties of the resulting copolymers is discussed.

  5. Fabrication of Chiral Stationary Phases via Continuous Assembly of Polymers for Resolution of Enantiomers by Liquid Chromatography

    Stefanie N. Guntari, Eunhyung Nam, Nina N. Pranata, Kenneth Chia, Edgar H. H. Wong, A. Blencowe, Tor K. Goh, Frank Caruso and Greg G. Qiao

    Article first published online: 7 JUL 2014 | DOI: 10.1002/mame.201400103

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    The continuous assembly of polymers (CAP) is utilized to fabricate immobilized-type chiral stationary phases (CSPs) as cross-linked thin films on solid supports for enantiomeric separation. The versatility of the CAP approach allows the formation of multilayered optically active films, thereby allowing for control over the chiral recognition capabilities.