SYNTHESIS OF ELASTOMERS FROM EPOXIDES.
ARMY WEAPONS COMMAND ROCK ISLAND ILL RESEARCH AND ENGINEERING DIV
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Elastomeric oxypropylene terpolymers and copolymers which are resistant to petroleum base oils and flexible at low temperatures were synthesized using a ferric chloride-propylene oxide-water complex catalyst. Terpolymers of propylene oxide PO-allyl glycidyl ether AGE-polar monoepoxides varied from viscous liquids to rubbery solids. In general, their inherent viscosity increased as the polar monoepoxide concentration decreased. With PO-AGE based vulcanizates, improved tensile strength and elongation were obtained as the concentration of PO was increased. Vulcanizates based on 90 PO-8 AGE and 2 epichlorohydrin EC1H swelled 55 after immersion for 70 hours at 212F. in ASTM No. 3 oil and were non brittle at -40C. High molecular weight terpolymers of PO-AGE-diepoxides were prepared. Unsaturated polar compounds i.e. allyl cyanide, allyl sulfide did not form terpolymers with PO-AGE. Author
- Polymer Chemistry
- Elastomers and Rubber