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Flammability and thermal behavior of phosphorus‐containing polyamide‐6
Author(s) -
Mateva Rosa P.,
Dencheva Nadya V.
Publication year - 1993
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.1993.070470706
Subject(s) - caprolactam , phosphinate , polyamide , flammability , polymerization , anionic addition polymerization , materials science , polymer chemistry , phosphonate , phosphorus , glass transition , chemistry , organic chemistry , fire retardant , polymer , composite material , metallurgy
An investigation is reported on the flammability and thermal behavior of polyamide‐6, obtained by anionic polymerization of ϵ‐caprolactam, carried out in bulk, in the presence of the following N ‐substituted phosphorus‐containing lactam derivatives: diethyl‐( N ‐caprolactam)‐phosphonite (PL 1 ), diethyl‐( N ‐caprolactam)‐phosphonate (PL 2 ), and 2,5‐dichlorophenyl‐bis( N ‐caprolactam)‐phosphinate (PL 3 ). Phosphorus‐containing lactam derivatives PL, 1 and PL 3 are used as activators of the anionic polymerization of ϵ‐caprolactam, and PL 2 , as a modifying additive. The phosphorus‐containing polyamide‐6 possesses improved flame retardancy, as well as improved thermo‐ and thermooxidative resistance. Destruction kinetics were studied in nitrogen and air atmospheres, and the activation energy for thermal and thermooxidative destruction have been determined. The effect of PL 1 PL 2 , and PL 3 on the melting temperature ( T m ) and glass‐transition temperature ( T g ) of polyamide‐6 was established. © 1993 John Wiley & Sons, Inc.