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The base-catalyzed rapid polymerization of caprolactam applied to the spinning of synthetic fiber was investigated. Acetanilide was used as molecular weight stabilizer, which could efficiently control the course of polymerization and to obtain the polymer with stable viscosity. The scale-up experiments on continuous polymerization and direct spinning were run smoothly.

对碱性催化的己内酰胺快速聚合应用于纺丝进行了研究,采用了合适的分子量稳定剂,控制了聚合进程,得到粘度稳定的聚合体,并且进行了连续聚合直接纺丝的扩大试验,取得了持续稳定运转的结果,纺出产品复丝,其抗张强度为5—6克/,延伸为19—25%,与水解聚合方法同类产品丝相仿。

In this paper, the kinetics of minisuspension polymerization of vinyl acetate was investigated.

本文主要对微悬浮法合成聚醋酸乙烯酯的动力学进行了研究。

Effects of different factors on the leaching of calcium from steel slag with acetic acid were investigated.

研究了不同参数对钢渣在醋酸溶液中钙离子溶出效率的影响。

The acylation of 2,3-dimethyl-2-butene by acetic anhydride in the presence of H3PO4 was investigated.

在H3PO4存在下进行了2,3-二甲基-2-丁烯与乙酐的酰化反应。

Moreover, the effects of moisture, solvent blank, added amount of acetic anhydride and temperature on determination were investigated.

同时,考察了水分含量、溶剂空白、乙酸酐加入量、温度对测定结果的影响。

The effects of the amount of catalyst, the amount of acetic anhydride, reaction time, and addition of solvents etc. on the acylation reaction were investigated.

考察了催化剂用量、乙酐用量、反应时间和溶剂的加入等因素对该酰化反应的影响。

The catalytic esterification of acetic anhydride and nine phenols were investigated in the presence of complex resin catalyst at 20 ℃,and its mechanismes were discussed.

研究了 2 0℃时,醋酸酐与九种酚在复合树脂催化剂下的催化酯化反应,并探索了其反应的机理。

The effects of reaction time and acetic anhydride/anhydroglucose unit molar ratio on the DS of starch acetates were investigated.

考察了反应时间和酰化试剂用量对酰化程度的影响。

The carbonation conversions of calcium acetate and calcium magnesium acetate from the acetification of limestone and dolomite reacting by acetic acid solution were investigated under different conditions during multiple calcination-carbonation cycles.

在不同反应条件下分别研究了石灰石和白云石的醋酸化产物醋酸钙和醋酸钙镁在循环煅烧-碳酸化过程中的碳酸化转化率。

The influence of pH, alcohol and acetone on SOD like activity was investigated.

考察了pH值及乙醇、丙酮对其SOD样活性的影响。

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