GC analysis of tail gas indicated that there were two de- water peaks at 160 C and 365 C of carbonization in the range of temperature from 100 C to 430 C. Wang et al have shown that the water eliminated from 100 C to 280 C was the water that remained in the resin coordinated with metal, and the water released from 280 C to 430 C was mainly from thermal decomposition of the polymer