Accession Number:

ADB047114

Title:

Arylenesiloxane Polymers for Use as High-Temperature Aircraft Integral Fuel Tank Sealants. Part 2. Synthesis and Properties of Alkyl- and Fluoroalkyl- Substituted Alkarylenesiloxane Monomers and Polymers

Descriptive Note:

Summary rept. Aug 1972-Aug 1975

Corporate Author:

AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1977-12-01

Pagination or Media Count:

119.0

Abstract:

In order to predict the molecular structures of arylenesiloxane polymers which would exhibit the optimum combinations of desired properties for high-temperature fuel-resistant sealant applications, it was found necessary to first develop pertinent structure-property correlations. To achieve the latter, new specifically-tailored monomeric alkyl- and fluoroalkyl-substituted alkarylene organosilicon compounds were synthesized and characterized. The bis-silanols were both homopolymerized as well as copolymerized with appropriate bis-aminosilanes or -disiloxanes by various condensation techniques to yield representative alkarylenesiloxane polymers. These were fully characterized with regard to chemical composition, molecular weight, thermal stability, glass-transition temperature and fuel insolubility. The polymers were also cured by means of organic peroxides and the vulcanizates evaluated for swell resistance to solvents and jet fuels.

Subject Categories:

  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE