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Effect of injection speed on phase morphology, crystallization behavior, and mechanical properties of polyoxymethylene/poly(ethylene oxide) crystalline/crystalline blend in injection processing
Author(s) -
Bai Shibing,
Wang Qi
Publication year - 2012
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23131
Subject(s) - polyoxymethylene , materials science , crystallization , phase (matter) , ethylene oxide , composite material , crystal (programming language) , amorphous solid , lamella (surface anatomy) , oxide , morphology (biology) , poly ethylene , chemical engineering , polymer , ethylene , copolymer , organic chemistry , catalysis , metallurgy , chemistry , genetics , biology , computer science , engineering , programming language
In this work, poly(ethylene oxide) (PEO) was added into polyoxymethylene (POM) as a new modifier, and the effects of the injection speed on the phase morphology, crystallization behavior, and the mechanical properties of the POM/PEO crystalline/crystalline blend were investigated. The results showed that with the increase in the injection speed, the size of PEO phase decreased, and the location of PEO changed from the amorphous region between POM spherulites to that between crystal lamella fibers or between crystal lamellas in POM, which was favorable to prevent the craze growing to the crack and effectively absorb the impact energy. As a result, the notched impact strength of the blend increased from 7.8 to 11.3 kJ/m 2 . POLYM. ENG. SCI., 52:1938–1944, 2012. © 2012 Society of Plastics Engineers