苯乙烯/异戊二烯渐变嵌段共聚物的负离子法合成和性能

廖明义,徐晓川

Anionic Synthesis and Dynamic Mechanical Poperties of Styrene/Isoprene Copolymers with Gradient Blocks

Mingyi LIAO,Xiaochuan XU

表3 St含量对S/I共聚物微观结构含量的影响

Table 3 Effect of the St content on the microstructure contents (mass fraction/%) of S/I copolymers

Sample No. 10 1 11 12 5 13 S/I 30/70 25/75 20/80 30/70 25/75 20/80 THF addition time/min 5 5 5 10 10 10 St contents 27.8 24.5 19.5 30.0 25.7 18.6 St block contents 1.7 2.0 1.8 3.3 5.7 6.1 1,2-Ip contents 0.7 0.6 0.0 0.7 0.6 0.0 1,4-Ip contents 82.3 82.3 86.3 80.0 86.3 90.8 3,4-Ip contents 17.0 17.1 13.7 19.3 13.1 9.2