全部

1·The viscosity and hydroxyl value of PHPB synthesized under these conditions attained better level.

在此条件下合成出来的PHPB的羟值和粘度均达到较好的水平。

2·A method for determining hydroxyl value of epoxy-containing polyester, namely acetyl chloride method is introduced.

介绍了一种含环氧基聚酯的羟值测定方法，即乙酰氯法。

3·Acid value and hydroxyl value are two pieces of characteristic value of the purpose products and the experiment adopts the titrimetric law of acid and alkali to confirm them.

酸值和羟值是目的产品的两个特征值，实验采用酸碱滴定法来确定两个特值。

4·The changes of molecular weight, life under heat, acid value, hydroxyl value and chlorine content of lac resin during bleaching and de-chlorinating processes have been studied.

本文研究了紫胶树脂在漂白和脱氯过程中分子量、热寿命、酸价、碘价、羟基值和氯含量的变化情况。