It was concluded from the experiment that the content of the isotactic polymer was the lest, the syndiotactic polymer was the most and the atactic polymer was between them. 由实验得到以下主要结论:PA-18降凝剂结构中全同立构聚合物含量最少,间同立构聚合物含量最多,无规立构聚合物含量介于两者之间。
In addition, with this catalyst system, the sequence length of isotactic 1,2-unit in polymer obtained can reach 4.2, a value which is slightly higher than those obtainable by ordinary molybdenum catalyst systems. 与一般钼体系相比,所得聚合物中1,2-链节的全同立体异构体的序列长度有所增加,约为4.2。
Study on low isotactic polypropylene ⅴ. Separation technique for viscous polymer 低等规聚丙烯的研制Ⅴ.粘性聚合物的分离技术
The data confirm that the homemade catalyst exhibits advantages of high catalytic efficiency, high sensitivity to hydrogen-modulation and easy adjusting and controlling the isotactic index of its polymer, compared with the reference catalyst. 小试聚合实验结果表明:新型催化剂的催化效率高、氢调敏感,聚合物等规指数容易调节并可以控制,聚合物复制了催化剂的形态,且粒径分布较窄。
Isotactic polypropylene ( iPP) is a kind of semi-crystalline polymer, the crystalline structure and perfection of which depends largely on the crystallization and annealing conditions. 等规聚丙烯(iPP)是一种半结晶性聚合物,它的结晶程度和结晶完整性在很大程度上依赖于结晶条件和后处理。