Isotacticity is one of the important index for quality control of polypropylene production.
等规度是聚丙烯生产中质量控制的重要指标之一。
The high isotacticity and crystallinity of the insoluble fraction make the material remain superior rigidity.
不溶物立构规整性好、结晶度高，保持了材料的良好刚性。
With cyclohexyl methyl dimethoxy silane(CHMMS) as external donor, isotacticity of polymer turned to be more adjustable.
结果表明，使用环己基- 甲基-二甲氧基硅烷，聚合物的等规度可调性好；
As results, the morphological structure of the product was close to that of the abroad with suitable molecular weight distribution, isotacticity and section distribution.
试产结果表明该方法有效地控制了分子量和等规序列长度及其分布，微观结构与进口料相近；
The behaviors of propylene polymerization under atmospheric pressure and the influence of electron donors on the activity and the isotacticity of the catalyst were investigated.
研究了所合成的催化剂催化丙烯常压聚合反应行为，考察了琥珀酸酯类给电子体对催化剂活性及聚丙烯等规度的影响。
Contents of trace hydrocarbons in propylene have large influences on polyreaction of propylene, yield of catalyst, transformation ratio of propylene and degree of isotacticity of products.
丙烯中微量烃类杂质的含量对丙烯的聚合反应、催化剂的得率、丙烯的转化率以及产品的等规度都有较大的影响。
Besides increasing the catalyst activity, the pre-polymerization can not only raise the bulk density and isotacticity of the PP product, but also significantly diminish the cracking of the PP powders.
预聚除能够提高催化剂的活性外，对提高聚丙烯粉料的表观密度和等规指数、减少聚丙烯颗粒的破碎有显著影响。
Besides increasing the catalyst activity, the pre-polymerization can not only raise the bulk density and isotacticity of the PP product, but also significantly diminish the cracking of the PP powders.
预聚除能够提高催化剂的活性外，对提高聚丙烯粉料的表观密度和等规指数、减少聚丙烯颗粒的破碎有显著影响。
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