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Reactive blending of modified polypropylene and polyamide 12: Effects of compatibilizer content on crystallization and blend morphology
Author(s) -
Wu Yang,
Yang Yuming,
Li Binyao,
Han Yanchun
Publication year - 2006
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.23572
Subject(s) - crystallization , maleic anhydride , materials science , polypropylene , polyamide , morphology (biology) , phase (matter) , chemical engineering , polymer blend , dispersion (optics) , compatibilization , polymer chemistry , composite material , copolymer , polymer , chemistry , organic chemistry , physics , optics , biology , engineering , genetics
The crystallization behavior and morphology of nonreactive and reactive melt‐mixed blends of polypropylene (PP) and polyamide (PA12; as the dispersed phase) were investigated. It was found that the crystallization behavior and the size of the PA12 particles were dependent on the content of the compatibilizer (maleic anhydride–modified polypropylene) because an in situ reaction occurred between the maleic anhydride groups of the compatibilizer and the amide end groups of PA12. When the amount of compatibilizer was more than 4%, the PA12 did not crystallize at temperatures typical for bulk crystallization. These finely dispersed PA12 particles crystallized coincidently with the PP phase. The changes in domain size with compatibilizer content were consistent with Wu's theory. These investigations showed that crystallization of the dispersed phase could not be explained solely by the size of the dispersion. The interfacial tension between the polymeric components in the blends may yield information on the fractionation of crystallization. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 3187–3192, 2006

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