Accession Number : AD0731743

Title :   Optimization of the Thermomechanical Behavior of a Poly(Chromium III Trisphosphinate).

Descriptive Note : Technical rept. Sep 69-Oct 71,

Corporate Author : PRINCETON UNIV N J DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Gillham,John K.

Report Date : OCT 1971

Pagination or Media Count : 11

Abstract : A two-component reactive system consisting of a poly(chromium 3 bisphosphinate) and dioctyl phosphinic acid reacts to form a poly(chromium 3 trisphosphinate). Extensive thermomechanical hysteresis is displayed by the system throughout the temperature range -180C to >300C. Thermal pretreatment to about 400C (the limit of thermal stability) eliminated these instabilities. These results correlate with the reported brittle and tough character of films of the poly(chromium 3 bisphosphinate) and poly(chromium 3 trisphosphinate) respectively. Regardless of thermal history (between 200C and 400C), the polymer system displayed three major transition regions: one the glass transition centered at about 0C, another centered at about 230C, and a third at about -200C. (Author)

Descriptors :   (*INORGANIC POLYMERS, THERMAL STABILITY), (*ORGANIC PHOSPHORUS COMPOUNDS, THERMAL STABILITY), COMPLEX COMPOUNDS, SYNTHESIS(CHEMISTRY), CROSSLINKING(CHEMISTRY), TORSION, MECHANICAL PROPERTIES, HYSTERESIS, TRANSITION TEMPERATURE, DAMPING, CHROMIUM COMPOUNDS

Subject Categories : Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE