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.
Descriptors:
Subject Categories:
- Polymer Chemistry