Accession Number : AD0259583

Title :   INVESTIGATION OF THERMAL DESTRUCTION OF CONDENSATION RESINS. THERMAL DESTRUCTION OF SOLIDIFIED EPOXY RESINS

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : NEYMAN,M.B. ; KOVARSKAYA,B.B.

Report Date : 22 MAR 1961

Pagination or Media Count : 1

Abstract : Unhardened epoxy resins are decomposed in the absence of oxygen at temperatures upward of 200 250 degrees. The thermal decomposition is followed by separation of liquid products. It is demonstrated that the destruction products of hardened and unhardened resins contain, on the thermal disintegration, CO, CO2, methane, ethylene, propylene, etc, as well as saturated and unsaturated aldehydes. The mechanism of disintegration of resins, hardened by polyethylenepolyamine (PEPA) and maleic anhydride constitutes in both cases a radical process, beginning with break-away and disintegration of epoxy groups. As a result of decomposition of the remnant of maleic anhydride great quantities of CO and CO2 are produced on decomposition of the epoxy resin hardened by maleic anhydride. The epoxy resin, hardened by PEPA, decomposes more easily than the resin hardened by ma eic anhydride; at the same time, more low-molecular products are formed. (Author)

Descriptors :   *EPITAXIAL GROWTH, *EPOXY RESINS, *HEAT RESISTANT PLASTICS, *PLASTICS, *PYROLYSIS, AMIDES, CARBON COMPOUNDS, CARBON DIOXIDE, CARBOXYLIC ACIDS, CHROMATOGRAPHIC ANALYSIS, DECOMPOSITION, ETHYL RADICALS, HARDENING, HIGH TEMPERATURE, HYDROCARBONS, HYDROGEN, MONOXIDES, POLYMERS, REACTION KINETICS, SOLIDS, SOUND REPRODUCTION SYSTEMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE