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Crystallization characteristics of polypropylene and low ethylene content polypropylene copolymer with and without nucleating agents
Author(s) -
Zhang Ruiyun,
Zheng Haifeng,
Lou Xiaolie,
Ma Dezhu
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070510106
Subject(s) - polypropylene , crystallization , differential scanning calorimetry , nucleation , copolymer , materials science , polymer chemistry , ethylene , chemical engineering , composite material , chemistry , polymer , organic chemistry , thermodynamics , catalysis , engineering , physics
In this paper, the crystallization characteristics of polypropylene and low ethylene content polypropylene copolymers with and without nucleating agents were studied by differential scanning calorimetry (DSC) and polarized light microscopy (PLM). In order to determine the nonisothermal crystallization rate of these materials, a new estimation method was introduced. Comparing with the crystallization rate coefficient (CRC), which was proposed by Khanna, we found the new approach is more reasonable. From the analysis of results of DSC and PLM, it can be concluded that nucleating agent is more efficient than it is in PP homopolymer. © 1994 John Wiley & Sons, Inc.