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Morphological, structural, and interfacial changes produced in composites on the basis of polypropylene and surface‐treated sepiolite with organic acids. III. Isothermal and nonisothermal crystallization
Author(s) -
Acosta J. L.,
Ojeda M. C.,
Morales E.,
Linares A.
Publication year - 1986
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.1986.070320325
Subject(s) - sepiolite , polypropylene , materials science , crystallization , isothermal process , isobutyric acid , composite material , chemical engineering , nucleation , kinetics , mesophase , composite number , polymer chemistry , chemistry , organic chemistry , thermodynamics , raw material , physics , liquid crystal , optoelectronics , quantum mechanics , engineering
Two kinetics studies with regard to isothermal and nonisothermal crystallization were conducted on composites samples containing polypropylene and sepiolite surface‐treated with isobutyric acid. Comparison of both studies allows us to demonstrate that isobutyric acid‐treated sepiolite incorporated to the polypropylene at different ratios acts as an effective nucleating agent and, due to its surface activity, generates two different crystalline structures, one of which is attributable to the formation of a mesophase on the periphery of the sepiolite particle.