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1·Tribenuron-methyl is synthesized via ring-opening reaction, phosgenation and condensation.

经过开环、光气化、缩合等一系列反应制备了苯磺隆。

2·Polylactic acid synthesis in two major ways:direct polymerization and lactate lactide ring-opening polymerization.

聚乳酸的合成方法主要有两种：乳酸直接聚合和丙交酯开环聚合。

3·In order to improve the performance of epoxy resin E-44, it was modified with silica sol through direct ring-opening reaction.

采用硅溶胶与环氧树脂e - 44直接开环反应的合成方法改进环氧树脂的性能。

4·Polycaprolactone (PCL) is a biodegradable synthetic aliphatic polyester made by the ring-opening polymerization of caprolactone.

聚己内酯(PCL)的合成是一种可生物降解脂肪族聚酯由己内酯开环聚合的。

5·Poly(L-lactide)(PLLA) was synthesized by ring-opening polymerization of L-lactide using cyclic tin alkoxide compound as initiator.

以环烷氧锡化合物引发L-丙交酯开环聚合制备高分子量聚L-乳酸。

6·There are two main methods to synthesis PLA, condensation polymerization of lactic acid and ring-opening polymerization of lactide.

聚乳酸的合成主要有两种方法：乳酸直接缩聚和丙交酯的开环聚合。

7·In addition, high reactivity with various nucleophiles leads to high regioselective and trans-stereospecific ring-opening products.

另外，各类亲核试剂对环氧的开环得到了区域选择性和反式的立体选择性都较高的开环产物。

8·ML-PLLA was synthesized by ring-opening polymerization of L-lactide in the presence of mannitol, it has the characteristic of low melt viscosity.

丙交酯在甘露糖醇分子上引发聚合得到的ML—PLLA具有低熔体粘度的特性。

9·The of polylactic acid(PLA) was obtained by ring-opening polymerization and the synthesis conditions to get 444,848 molecular weight were optimized.

采用间接开环聚合法合成了平均分子量为444 ，848的聚乳酸，并对合成工艺作了优化。

10·Surprisingly, ring-opening reactions that form glycol or glycol ether by-products are minimized by using the vinylpyridine polymer-containing catalysts.

通过使用含乙烯基吡啶聚合物的催化剂能令 人惊奇地使形成二醇或二醇醚副产物的开环反应最少化。

开环

1·Polylactic acid synthesis in two major ways:direct polymerization and lactate lactide ring-opening polymerization.

聚乳酸的合成方法主要有两种：乳酸直接聚合和丙交酯开环聚合。

2·There are two main methods to synthesis PLA, condensation polymerization of lactic acid and ring-opening polymerization of lactide.

聚乳酸的合成主要有两种方法：乳酸直接缩聚和丙交酯的开环聚合。

3·Surprisingly, ring-opening reactions that form glycol or glycol ether by-products are minimized by using the vinylpyridine polymer-containing catalysts.

通过使用含乙烯基吡啶聚合物的催化剂能令 人惊奇地使形成二醇或二醇醚副产物的开环反应最少化。

4·A new type of friction material has been prepared with carbon fiber and steel fiber as reinforcements and ring-opening polymerized phenolic as matrix resin.

采用碳纤维和钢纤维为增强材料、开环聚合酚醛树脂为基体，制得新型摩阻材料。

5·Polycaprolactone (PCL) is a biodegradable synthetic aliphatic polyester made by the ring-opening polymerization of caprolactone.

聚己内酯(PCL)的合成是一种可生物降解脂肪族聚酯由己内酯开环聚合的。