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Transcrystallinity phenomena in a polypropylene/kevlar fiber system. I: Influence of crystallization conditions
Author(s) -
Avella Maurizio,
Della Volpe Gaetano,
Martuscelli Ezio,
Raimo Maria
Publication year - 1992
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760320511
Subject(s) - crystallization , materials science , kevlar , tacticity , composite material , polypropylene , fiber , isothermal process , chemical engineering , polymer , polymerization , thermodynamics , composite number , physics , engineering
The isothermal crystallization from the melt of isotactic polypropylene in the presence of Kevlar 49 fibers has been investigated. The nucleating ability of the fibers was demonstrated, and the presence of extensive transcrystalline regions was related to crystallization parameters, such as crystallization temperature, melt precrystallization temperature, and residence time at precrystallization temperature. The results are discussed in terms of the presence of heterogeneities in the bulk and preformed self‐seeded nuclei located in the anfractuosities of fiber surfaces.