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5 St含量对S/I共聚物力学和动态力学性能的影响

Table 5 Effect of St content on the mechanical and dynamic properties of S/I copolymers

Sample No. 10 1 11 12 5 13 Shore hardness 72 74 68 82 88 80 Tensile strength/MPa 19.4 18.1 15.8 17.3 17.0 15.7 Tear strength/N·mm-1 34 32 33 34 36 36 Elongation at break/% 454 406 377 363 358 345 tanδmax 0.47 0.57 0.87 0.50 0.44 0.62