Macromolecular Materials and Engineering
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Materials Science Weekly Newsletter
Recently Published Articles
- Electrostatic Discharging Behaviour of Polycarbonate Parts Made by Process-Integrated Surface Modification
Jürgen Nagel, Felix-Aron Pahner, Cordelia Zimmerer, Thomas Härtig, Michael Gehde and Gert Heinrich
Article first published online: 25 JUL 2014 | DOI: 10.1002/mame.201400114
A layer of polyetylene imine, labelled with a spectroscopic marker, is transferred from a mould surface to the surface of polycarbonate parts by injection moulding. The amount of bound polymer is investigated. Those parts can be used for modification of the surface, for instance for electrostatic discharging of thermoplastic surfaces.
- 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
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.
- 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
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.
- 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
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.
- 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
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.