The role of a polyester-based thermoplastic elastomer in the crystallization of an aliphatic polyketone terpolymer

Title
The role of a polyester-based thermoplastic elastomer in the crystallization of an aliphatic polyketone terpolymer
Authors
김병철
Keywords
CARBON-MONOXIDE COPOLYMERS; ALTERNATING ETHYLENE; THERMAL-DEGRADATION; DYNAMIC CRYSTALLIZATION; RHEOLOGICAL PROPERTIES; PHYSICAL-PROPERTIES; SPHERULITE GROWTH; BEHAVIOR; BLENDS; POLYPROPYLENE
Issue Date
2015-04
Publisher
NATURE PUBLISHING GROUP
Citation
POLYMER JOURNAL, v. 47, NO 7, Page. 493-497
Abstract
The effect of a commercial grade polyester thermoplastic elastomer (HY) on the crystallization behavior of a polyketone terpolymer of ethylene, propylene and carbon monoxide (EPCO) was investigated in terms of shear rate, temperature and blend composition. HY retarded the isothermal crystallization of EPCO in the static state. As the HY content increased, the half-time for the crystallization of the EPCO/HY blends increased, and the cold crystallization temperature (T-c) decreased. In addition, the average value of the Avrami exponent decreased, but the crystallization rate constant increased. The retardation of crystallization could be explained by steric hindrance or a shield effect of the HY phase on the growth of EPCO spherulites at a temperature near the Tc. HY also retarded the crystallization of EPCO in the dynamic state. However, the induction time of the blends was slightly decreased by increasing the magnitude of shear rate up to 10 rad s(-1). X-ray diffraction revealed that the introduction of HY had little influence on the crystal structure of EPCO.
URI
http://www.nature.com/pj/journal/v47/n7/full/pj201525a.htmlhttp://hdl.handle.net/20.500.11754/23766
ISSN
0032-3896; 1349-0540
DOI
http://dx.doi.org/10.1038/pj.2015.25
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > DEPARTMENT OF ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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