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Influence of processing conditions on some properties of anionically synthesized polycaprolactam in presence of lithium chloride
Author(s) -
Acierno D.,
La Mantia F. P.,
Polizzotti G.,
Russo S.,
Titomanlio G.
Publication year - 1980
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.1980.070250916
Subject(s) - crystallinity , caprolactam , materials science , crystallization , spinning , lithium chloride , melting point depression , amorphous solid , melting point , melt spinning , nylon 6 , polymerization , anionic addition polymerization , lithium (medication) , polymer , chemical engineering , polymer chemistry , composite material , organic chemistry , chemistry , medicine , engineering , metallurgy , endocrinology
Nylon 6–LiCl systems of various concentrations were prepared by anionic polymerization of caprolactam in the presence of salt. A depression of both crystallization rate and melting temperature was evidenced through x‐ray, density, and DSC analyses. Such a preliminary characterization allowed for choosing the proper conditions in order to obtain amorphous fibers from a spinning operation which was performed at a temperature lower than the pure polymer melting point. These results are of technological relevance, especially in view of obtaining, as in similar cases, large amorphous orientations through a spinning–drawing process and high‐modulus fibers after subsequent crystallization. Also, the possibility of restoring some crystallinity in the material has been proven.