PREPARATION AND PROPERTIES OF CARBON FIBERS REINFORCED PTA COMPOSITES UNDER CATALYTIC CURING PROCESS

Abstract

Abstract: To reduce the curing temperature and simplify the curing process, bromotris (triphenylphosphine) copper (Ⅰ) was added into the polytriazole resin system (PTA) as the catalyst. According to the relationship between the amount of catalyst and the gel time of PTA, the amount of catalyst was determined to be as 3‰ of the least molar amount of the monomer. Under catalytic conditions, PTA composites reinforced by T300B carbon fiber (C-PTA/T300B) were prepared in the curing process of 50℃/6h+100℃/2h+150℃/2h. The influences of catalyst to the glass transition temperature (T_g), 5%-weight-loss temperature (T_d5) and mechanical properties of C-PTA/T300B composites were studied. Compared with the non-catalytic PTA composites reinforced by T300B carbon fiber (PTA/T300B), the results showed that to aehieve same mechanical properties, the curing temperature of C-PTA-T300B composites decreased 30℃, which greatly simplifies the after-treatment process. Moreover, the T_g was 21℃ enhanced, and the T_d5 was 21℃ and 5℃ promoted in air and N₂ environment, respectively.

Key words: polytriazole resin, catalyst, low temperature curing, molding process optimum

CLC Number:

TB332

XU Jian-wen, WAN Li-qiang, ZHANG Cun-chao, GUO Bing. PREPARATION AND PROPERTIES OF CARBON FIBERS REINFORCED PTA COMPOSITES UNDER CATALYTIC CURING PROCESS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(8): 35-40.

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