Accession Number : AD0686076

Title :   THERMAL DEGRADATION OF POLYAMIDES. PART I. ALIPHATIC POLYMERS.

Descriptive Note : Technical rept. Sep 66-Jun 68,

Corporate Author : AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Goldfarb,Ivan J. ; Meeks,A. C.

Report Date : FEB 1969

Pagination or Media Count : 84

Abstract : The thermal degradation of two aliphatic polyamides, polyhexamethylene adipamide (nylon 6.6) and polyhexamethylene sebacamide (nylon 6.10) were studied. Molecular weight changes, weight loss, and volatile product analysis were used to help elucidate the reaction mechanisms. The presence of low molecular weight material and polymerizable end groups in these polymers complicated the interpretation of molecular weight changes during degradation. The weight loss data obtained allowed the calculation of rate data. Nylon 6.6 degradation gave an activation energy of 45 kcal/mole while nylon 6.10 degradation was characterized by an activation energy of 55 kcal/mole. Both polymers gave evidence of random scission kinetics. The volatile products were consistent with the occurrence of further condensation, scission, and cross-linking reactions. (Author)

Descriptors :   (*PYROLYSIS, NYLON), (*NYLON, DEGRADATION), POLYAMIDE PLASTICS, MOLECULAR WEIGHT, HEAT OF ACTIVATION, REACTION KINETICS, CROSSLINKING(CHEMISTRY), VISCOSITY, MASS SPECTROSCOPY, ALIPHATIC COMPOUNDS

Subject Categories : Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE