Accession Number : AD0080283


Title :   ELASTOMERIC DITHIOPOLYESTERS


Descriptive Note : Technical rept. Aug 1954-Oct 1954


Corporate Author : AERONAUTICAL SYSTEMS DIV WRIGHT-PATTERSON AFB OH MATERIALS LAB


Personal Author(s) : KNOBLOCH, FRED W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/080283.pdf


Report Date : Jun 1955


Pagination or Media Count : 26


Abstract : Elastomers have been prepared from an experimental liquid polymer formulation derived from a condensation product of mercaptoacetic acid and triethylene glycol. Two general types of these elastomers are discussed; one was obtained by reaction of the liquid polymer with organic and inorganic peroxides, the other by reaction of terminal mercapto groups with unsaturated aldehydes. Selected specimens of each type of elastomer were successfully compounded and vulcanized using conventional rubber processing equipment. The behaviour of these vulcanizates in fuels and synthetic ester base oils has been studied along with the effects of aging at elevated temperatures. The vulcanized dithiopolyesters showed excellent resistance to the swelling action of 70/30 iso-octane/toluene fuel mixtures. Ester base oils of the MIL-78O8A type were found to cause shrinkage. Elevated temperatures (350 F) consistently brought about rapid deteri oration of both vulcanized and raw polymer stocks.


Descriptors :   *ELASTOMERS , *VULCANIZATION , PREPARATION , AGING(MATERIALS) , PHYSICAL PROPERTIES , ESTERS , POLYESTER PLASTICS , ETHYLENE GLYCOL


Subject Categories : Polymer Chemistry
      Elastomers and Rubber


Distribution Statement : APPROVED FOR PUBLIC RELEASE