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Study on the crystallization kinetics of PP/GF composites
Author(s) -
Tai HorngJer,
Chiu WenYen,
Chen LeoWang,
Chu LineHwa
Publication year - 1991
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.1991.070421205
Subject(s) - spherulite (polymer physics) , crystallization , materials science , polypropylene , composite material , optical microscope , kinetics , polarized light microscopy , glass fiber , morphology (biology) , isothermal process , fiber , scanning electron microscope , chemical engineering , polymer , thermodynamics , optics , physics , quantum mechanics , biology , engineering , genetics
The crystallization kinetics and morphology of glass fiber‐reinforced polypropylene (PP/GF) were investigated in this work. Both isothermal and nonisothermal crystallization behaviors of 90PP/10GF, 80PP/20GF, and 70PP/30GF were examined with a DSC instrument. It was found that the addition of glass fiber would increase the crystallization rate of PP and increase the content of β spherulite, which was most likely formed at temperatures between 390 and 400 K. The morphology of spherulites of PP/GF composites were examined with SEM and a polarized microscope. All experimental observations conformed rather well with the theoretical approach, a dynamic crystallization model, proposed in our previous work. The size of α spherulites of PP would decrease at lower crystallization temperature, or at higher cooling rate, or by adding glass fiber in it.