Abstract: In order to get the best conditions on volatile content analysis of phenolic-based prepreg, production technology, composition and curing mechanism have been analyzed and we designed a series of contrast test of phenolic-based prepreg at 80℃, 90℃ and 100℃ at a series of different holding time. The condition on accurate analysis for phenolic-based prepreg was determined. In this context,we did further research and found out the best condition on rapid analysis at a higher temperature, where part of the curing reaction could happen.The condition on accurate analysis for phenolic-based prepreg is: the condition of temperature for testing volatiles content is 80 ℃, holding time is 80 min. The condition on rapid analysis is: the condition of temperature for testing volatiles content is 110℃, holding time is 15 min. And it is concluded that the phenolic-based of prepreg volatile content test condition does not relate with the varieties of the substrate.

Key words: volatiles, phenolic, resin, prepreg, curing