Synthesis of New Low-Temperature Petroleum-Resistant Elastomers.
Abstract
Four petroleum-resistant elastomers have been developed which appear suitable for low temperature use. These materials are: (NP(OCH2CF3)2-NP(OCH2C3F7)2)n (1:1 and 2:1), (NP(OCH2CF3)2-NP(OCH2C3F6CF2H)2)n, anD (NP(OCH2CF2CF2H)2-NP(OCH2C5F10CF2H)2)n. These elastomers have initial decomposition points in the range of 300C in air. The 1:1 copolymer of (NP(OCH2CF3)2-NP(OCH2C3F7)2)n has a Tg of -77C, is very inert chemically, and is soluble only in selected fluorocarbon solvents. The material does not burn in air even in a direct flame. The copolymers (NP(OCH2CF3)2-NP(OCH2C3F6CF2H)2)n and (NP(OCH2CF2CF2H)2-NP(OCH2C5F10CF2H)2)n, are highly elastic and are unaffected by hydrocarbons and benzene, but are soluble in many polar organic solvents. Other poly(phosphazenes) were prepared which had interesting and useful properties. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1970
- Accession Number
- AD0720215
Entities
People
- Kennard A. Reynard
- Selwyn H. Rose