The hydroxyl value of epoxy-containing polyester was determined by analyzing acetification principle and using acetyl chloride as acetifier and methylene chloride as solvent.

通过对原理分析,选用乙作剂、二甲烷作溶剂,测定含环氧基聚值。

The propionyl chloride was found to be the appropriate acylating agent in terms of the cost.

通过成本比较,认为丙是合适剂。