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Different kinds of transcrystallinity developed from glass fiber/isotactic polypropylene/β‐nucleation agents composite by microinjection molding
Author(s) -
Mi Dashan,
La Renxi,
Chen Wanwan,
Zhang Jie
Publication year - 2016
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3787
Subject(s) - materials science , nucleation , composite material , tacticity , polypropylene , molding (decorative) , crystallization , small angle x ray scattering , composite number , glass fiber , compression molding , fiber , scattering , polymer , chemical engineering , optics , polymerization , chemistry , mold , physics , organic chemistry , engineering
This study aims to investigate the interfacial crystallization between glass fiber (GF) and polypropylene (PP) by micro‐injection molding. Three different kinds of transcrystallinity (TC) were formed at different conditions by different formation mechanisms. The virgin GF could form the TC by aligning the adjacent molecules to parallel with the GF surface, while the modified GF (M‐GF) could induce the TC directly on its surface. Furthermore, the M‐GF reduced the number of nano‐voids between the GF and iPP, characterized by X‐ray scattering technique. When β‐nucleation agents (β‐NA) were added, a novel net‐coating layer was first discovered on the M‐GF surface. This structure may be caused by the self‐organization of β‐NA and leads to some unique intensity streaks in SAXS patterns. Based on the experimental results, a schematic model was proposed. Copyright © 2016 John Wiley & Sons, Ltd.