Accession Number:

AD0745900

Title:

Synthesis of New Low Temperature Petroleum-Resistant Elastomers

Descriptive Note:

Annual rept. 4 Mar 1971-3 Mar 1972

Corporate Author:

ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA

Report Date:

1972-06-01

Pagination or Media Count:

31.0

Abstract:

Three petroleum resistant elastomers of polyfluroalkoxyphosphazene, which are suitable for low temperature application have been prepared. The copolymer has a glass transition temperature of -77 C and an initial decomposition point of 300 C in air. The copolymer is very inert chemically and is soluble only in selected fluorocarbon solvents. The material does not burn in air even in a direct flame. Samples were cured to give tensile strengths of 1100 psi and elongations of 280. Several process studies are described. The effect of cyclics on the course of derivatization was studied. The pH DURING HYDROLYSIS APPEARS TO AFFECT THE MOLECULAR WEIGHT OF THE PRODUCT. The removal of salts from the derivatized copolymer by several different methods was investigated.

Subject Categories:

  • Polymer Chemistry
  • Elastomers and Rubber

Distribution Statement:

APPROVED FOR PUBLIC RELEASE