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Fractionated crystallization of dispersed PA6 phase of PP/PP‐ g ‐MAH/PA6 blends
Author(s) -
Shi Dean,
Yin Jinghua,
Ke Zhuo,
Gao Ying,
Li R. KY
Publication year - 2004
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.13524
Subject(s) - crystallization , crystallinity , materials science , differential scanning calorimetry , scanning electron microscope , polarized light microscopy , phase (matter) , compatibilization , copolymer , chemical engineering , polymer chemistry , crystal (programming language) , crystallography , polymer blend , chemistry , polymer , composite material , organic chemistry , optics , physics , thermodynamics , engineering , computer science , programming language
Fractionated crystallization behavior of dispersed PA6 phase in PP/PA6 blends compatibilized with PP‐ g ‐MAH was investigated by scanning electron microscopy (SEM), differential scanning calorimeter (DSC), polarized light microscopy (PLM), and wide‐angle X‐ray diffraction (WAXD) in this work. The lack of usual active heterogeneities in the dispersed droplet was the key factor for the fractionated crystallization of PA6. The crystals formed with less efficient nuclei might contain more defects in the crystal structures than those crystallized with the usual active nuclei. The lower the crystallization temperature, the lesser the perfection of the crystals and the lower crystallinity would be. The fractionated crystallization of PP droplets encapsulated by PA6 domains was also observed. The effect of existing PP‐ g ‐MAH‐ g ‐PA6 copolymer located at the interface on the fractionated crystallization could not be detected in this work. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 3742–3755, 2004