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

酰化原理分析,选用乙酰作酰化剂、二甲烷作酰化溶剂,测定含环氧基聚酯的。

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

成本比较,认为丙酰是合适的酰化剂。