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Young's modulus of transcrystallinities in semicrystalline thermoplastic composites
Author(s) -
Zeng Hanmin,
Zhang Zhiyi,
Zhang Mingqiu,
Xu Jiarui,
Jian Nianbao,
Mai Kancheng
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.1994.070540504
Subject(s) - crystallinity , materials science , composite material , lamellar structure , peek , modulus , polymer , polyethylene , amorphous solid , ether , composite number , crystallography , chemistry , organic chemistry
In a fiber/semicrystalline polymer system, interphasial transcrystallinities might form between the fibers and the matrix bulk that is composed of spherulites. By using an analogy method, the Young's modulus E t of transcrystallinities in their growth direction was predicted by a well‐known composite modeling theory. It is shown that E t is a function of the polymeric lamellar morphology and crystallinity. It is higher than the Young's modulus E s of the bulk spherulites and positively affects the stiffness of the materials in which the transcrystallinities are formed. The study was focused on poly(ether ether ketone) (PEEK) but with polyethylene (PE) as a comparison. Also, it is demonstrated the various possibilities of the value E T and the ratio E T / E s for different polymeric matrices depending on their lamellar moduli and the amorphous‐phase ones. © 1994 John Wiley & Sons, Inc.