Syntheses and Characterizations of Thermally Reworkable Epoxy Resins. Part I

摘要

To meet the need for reworkble epoxy resins, a series of cycloaliphatic dieoxides containing thermally cleabable carbamate linkages were synthesized and characterized. These materials were shown to undergo curing reactions with cyclic anhydride in a similar fashion as a commercial cycloaliphaticepoxide, except that the carbamate group within the diepoxides can act as the internal catalyst. Furthermore, cured samples of the formulations from these diepoxides started to decompose at lower temperatures, i.e., between 200-300 deg C as compared with 350 deg C for the cured sample of the commercial cycloaliphatic epoxide, which showed their potential to the used as reworkable underfill encapsulants in the electronic packaging area.