Polyimide oligomers (prepolymers) and resins of the PMR-15 type have been prepared from 5-norbornene- 2,3-dicarboxylic half acid ester (NE), 3,3',4,4'-benzophenonetetracarboxylic diester (BTDE) and a series of diamines including, and related to, 3,3'-diaminobenzophenone, viz. 3,3'-diaminobenzhydrol, 3-[(m,m'- diamino)benzhydryloxylpropyne (MDA-OMA) and 3,3'-diaminodiphenyl-~t,~t'-difluoromethane (FMDA). The PMR synthetic pathway (monomers~prepolymer--*resin) has been assessed by dynamic mechanical thermal analysis. The T~ values for resins incorporating BTDE are significantly lowered compared to that for PMR-15 itself. The fluorine-containing PMR-15 type of resin (from FMDA) is of higher thermal stability than PMR-15 itself.
Посилання на статтю:
Structure-property relationships in PMR-type polyimide resins: 4. Investigation of materials derived from diamino(diaryl)methanes* / Peter N. Prestont and Veerappa B. Jigajinni // Polymer. – 1994. – Vol 35. – P. 2378-2384.