STUDIES ON BISMALEIMIDES AND RELATED MATERIALS .1. D M T A INVESTIGATION OF THE REACTION OF BISMALEIMIDES WITH M-TOLUALDEHYDE AZINE AND 3,5-DIMETHYLPYRIDINE N-OXIDE - AN APPROACH TO THE DESIGN OF NOVEL REACTIVE DILUENTS

Dynamic mechanical thermal analysis (d.m.t.a.) profiles have been reco rded for interaction of m-tolualdehyde azine and 3,5-dimethylpyridine N-oxide with the bismaleimide (BMI) derived from 3,3'-diaminobenzophen one. Additional chemical events for each system are recognized at temp eratures below the conventional BMI curing region. Resins prepared fro m the BMI/azine and BMI/N-oxide systems have lower thermal stability t han the neat resin but differences are moderate at low additive concen trations.