... calcium carbide route, with methanol as its solvent and azo-diisobutyronitrile as the initiator, through polymerization, ... react with acid, ether and acetyl, and it can be esterified, etherified and actualized. In addition, it ... Heat with steam to a proper temperature step by step, and at the same time, keep stirring till ... PVA of thorough alcoholysis is between 95c and 98c, and no boiling has to be dome. ...