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The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Investigation Of Plasticizers For Oil-Resistant Rubber For Service At Low Temperatures In Contact With Hydrocarbon Fluids

Report Number: WADC TR 52-80
Author(s): J. C. Hillyer; C. S. Imig
Corporate Author: Phillips Petroleum Company
Laboratory: Materials Laboratory
Date of Publication: 1952-01
Pages: 49
Contract: AF 33(038)-17201
Project: None Given
AD Number: AD0002179
Original AD Number: 2179

Abstract:
Materials evaluated as low-temperature plasticizers for Paracri l NS- 26 include: liquid polybutadiene (PBD) and their derivatives; the butadiene (BD)-furfural cotrimer and several of its derivatives; hydroxylated BD derivatives; polyethylene glycol derivatives; Thiokol ZL-109 alone and blended with TP-90B; substituted amides, ureas, and urethans; TP-90B derivatives; hydroxy nitriles; diallyl sebacate and divinylbenzene as vulcanizable softeners; silicones; phosphonate esters; mercaptan-ethylene oxide condensates; and sorbitol Most of the plasticizers failed to improve the low-temperature properties over those of unplasticized stock; the plasticized materials also exhibited a high extractability with a 70/30 isooctane-PhMe mixture. Several hydroxy polybutadiene containing about 5 to 10% O, several ZL-109/TP-90B blends, N-formylmorpholine, and polyethylene glycol derivatives appeared promising. Several 90/10 co-polymers of 1,3 butadiene and 1-cyano-1, 3-butadiene, prepared from 1-cyano butadiene containing varying amounts of the cis and Transisomers isomers, were compounded with 20 phr of TP-90B and with 20 phr of liquid PBD. A comparison of the copolymers with Paracril B and Paracril 18 samples similarly compounded showed the general superiority of the cyano butadiene copolymers in low-temperature properties and their general inferiority in oil resistance and other physical properties. cis-1-Cyano butadiene appeared to yield the best experimental copolymers.

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