Crude product by simple distillation, styrene recovery was 89.41% of total styrene monomer purity of 99.9%, and catalyst recycling, the effect is better.
粗产物经简单蒸馏，苯乙烯的总回收率为89.41%，苯乙烯单体纯度可达99.9%以上，并对催化剂进行再生利用，效果较为理想。
The factors affecting the PDLLA molecular weight were found to be the monomer purity, the catalyst concentration, the polymerization temperature, the polymerization time and the vacuum.
研究了影响PDLLA分子量的因素包括丙交酯单体的纯度、催化剂的浓度、反应温度、反应时间及真空度等。
GC-MS method of testing was carried on quantitative analysis to the monomer purity after being purified finally, the result was revealed that is up to 95% for the purity after being purified.
采用GC - MS测试方法对提纯之后的单体纯度进行定量分析，结果显示为提纯之后的单体纯度达到了95%。
In condensation polymerization, the monomer will affect the purity of the molar ratio of functional groups, so that the molecular weight deviates from the set value.
在缩合聚合中，单体的纯度会影响到官能团的摩尔比，从而使聚合物的分子量偏离设定值。
The progress in synthesis technology of cyanate ester with high purity and high yield monomer, and the status of domestic industrialized synthesis are reviewed.
评述了高纯度和高收率氰酸酯单体合成的新进展，以及国内氰酸酯单体工业合成的现状。
The effects of the synthesis conditions such as monomer(lactide) purity, catalyst(stannous octoate) concentration, vacuum level, reaction time and temperature, were discussed.
探讨了单体丙交酯纯度、催化剂辛酸亚锡用量、反应时间、反应温度及真空度对聚合物相对分子质量的影响。
METHODS Various influencing factors in the preparation of PLA were studied, such as the purity of monomer, the polymerization temperature, and the quantity of the initiator.
方法考查单体的制备与纯化、溶剂残余量、聚合方式、引发剂用量、聚合时间、聚合温度等因素对聚合的影响。
The present invention provides one process of preparing high purity thiophene monomer and its polymer in high yield and the application of thiophene polymer.
本发明提供了一种以粗制噻吩类聚合物单体制备高纯度、高得率噻吩类聚合物单体及其聚合物的方法，和该噻吩类聚合物的应用。
Output of styrene monomer was 82.3 % . Purity was 99.9 % , obtained by simple distillation.
粗产物经简单蒸馏，苯乙烯的总回收率为82.3％，苯乙烯纯度可达99.9％。
Then, catechin monomer was isolated and purified by HSCCC with the purity above 98%.
再以该茶多酚为原料，应用HSC CC分离纯化儿茶素单体，所得egcg产品的纯度达到98%以上。
Then, catechin monomer was isolated and purified by HSCCC with the purity above 98%.
再以该茶多酚为原料，应用HSC CC分离纯化儿茶素单体，所得egcg产品的纯度达到98%以上。
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