段规

这两个位点分别处于结构域1的1个β-折叠片和一段无规卷曲上，参与和T2/T3三核簇的连接。

They both located in Domain 1 , which participated in connection of T2 / T3 trinuclear cluster . 2 .

1HNMR和溶解试验结果表明，共聚物中各链段呈无规分布，GA序列长度在1.3~1.8之间。

1H NMR results and solubility tests indicated that the comonomers were basically randomly distributed in the copolymer chains , and the average sequence length of glycolide was in the range of 1.3 to 1.8 , depending on the feed ratio of the comonomers .

末端嵌段丁苯无规共聚物的合成研究

A research of the synthesis of terminal-blocked butadiene-styrene random copolymers

而OH基的生成速率及COOH基、OH基生成比和聚丙烯的种类有关，就COOH基和OH基生成比而言，其大小顺序为均聚物>嵌段共聚物>无规共聚物。

So far as the ratio of the relative amount of COOH groups to OH groups was concerned . the sequence could be expressed as homopolymer > block copolymer > random copolymer .

研究了用臭氧氧化法对聚丙烯表面进行涂装性改良时，丙烯均聚物、乙烯&丙烯嵌段共聚物及无规共聚物表面上含氧官能团相对生成量和涂膜剥离强度之间的关系。

This paper has studied the relationship between the peeling strength and the relative amount of oxygen - containing groups produced on the surfaces of propylene homopolymer , ethylene - propylene block copolymer and random copolymer when ozonization was used to improve the coating properties of PP surface .