改进型中乙烯基聚丁二烯橡胶性能的研究 Ⅱ.玻璃化温度和动态力学性能 |
Study on Properties of Modified MVBRs Part 2.Study on Tg and Dynamic Mechanical Properties |
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DOI: |
中文关键词: 聚丁二烯 中乙烯基聚丁二烯 动态力学性能 |
英文关键词: polybutadiene MVBR dynamic mechanical properties |
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中文摘要: |
系统研究线形中乙烯基聚丁二烯橡胶(L-MVBR)、星形中乙烯基聚丁二烯橡胶(S-MVBR)、线形1,4-1,2-立构二嵌段中乙烯基聚丁二烯橡胶(L-B-MVBR)和星形1,4-1,2-立构二嵌段中乙烯基聚丁二烯橡胶(S-B-MVBR)的玻璃化温度及动态力学性能,发现L-B-MVBR具有较佳的动态力学性能,内耗生热较低;相对分子质量和1,2结构质量分数的增大,星形支化结构均有利于嵌段MVBR产生微观相分离结构,控制适宜的嵌段比可确保微观相分离结构更为显著。 |
英文摘要: |
The Tg and the dynamic mechanical properties of four kinds of modified medium vinyl polybutadiene rubbers (MVBRs) including linear MVBR (L-MVBR),star MVBR(SMVBR),linear 1,4-1,2-stereodiblock MVBR(L-B-MVBR)and star 1,4-1,2-stereodiblock MVBR(S-B-MVBR)were systematically investigated.The results showed that L-B-MVBR had better dynamic mechanical properties and lower heat build-up;the star-branched structure and the increase of molecular weight and 1,2-polybutadiene content were benificial to form the microphase seperated structure;and the appropriate ratio of the 1,2-polybutadiene block to the 1,4-polybutadiene block resulted in a more remarkable micro-phase seperated structure. |
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