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Influence of regioirregular structural units on the crystallization of isotactic polypropylene
Author(s) -
Marigo Antonio,
Marega Carla,
Saini Roberta,
Camurati Isabella
Publication year - 2000
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 - 10.1002/1097-4628(20010110)79:2<375::aid-app230>3.0.co;2-z
Subject(s) - tacticity , crystallization , diffraction , materials science , phase (matter) , crystallography , polypropylene , x ray crystallography , polymer chemistry , polymer science , chemistry , composite material , polymerization , polymer , optics , physics , organic chemistry
Abstract Seven samples of isotactic polypropylene were examined to study the influence on the formation of the γ crystalline phase of possible regiodefects along the chain. Wide‐angle X‐ray diffraction allowed the determination of the percentage of the γ phase in the samples and 13 C‐NMR spectroscopy was used to correlate the development of the γ phase with the existence of regioirregular structural units along the chain. Furthermore, it was possible to appraise the contributions given by the different families of lamellae to the small‐angle X‐ray diffraction patterns. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 375–384, 2001