苯乙烯/异戊二烯渐变嵌段共聚物的负离子法合成和性能
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廖明义,徐晓川
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Anionic Synthesis and Dynamic Mechanical Poperties of Styrene/Isoprene Copolymers with Gradient Blocks
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Mingyi LIAO,Xiaochuan XU
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| 表2 调节剂加入时间对S/I共聚物微观结构含量的影响 |
| Table 2 Effect of the modifier addition time on the microstructure contents (mass fraction, %) of S/I copolymers |
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| Sample No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
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| S/I | 25/75 | 25/75 | 25/75 | 25/75 | 25/75 | 25/75 | 25/75 | 25/75 | 25/75 | | THF addition time/min | 5 | 7 | 8 | 9 | 10 | 12 | 15 | 20 | 30 | | St contents | 24.5 | 24.4 | 24.1 | 26.4 | 25.7 | 25.9 | 24.6 | 26.3 | 27.0 | | St block contents | 2.0 | 2.6 | 3.0 | 5.3 | 5.7 | 9.5 | 11.6 | 14.0 | 14.0 | | 1,2-Ip contents | 0.6 | 0.1 | 0.3 | 0.7 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | | 1,4-Ip contents | 82.3 | 84.3 | 86.5 | 86.2 | 86.3 | 90.7 | 91.4 | 90.3 | 90.8 | | 3,4-Ip contents | 17.1 | 15.6 | 13.2 | 13.1 | 13.1 | 9.3 | 8.8 | 9.0 | 9.0 |
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