| Effect of conversion rate on micro-structure and properties of high trans-butadiene-isoprene copolymer rubber |
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| DOI： |
| Key Words: supported TiCl4 catalyst；butadiene；isoprene；copolymerization；conversion rate |
| Author Name | Affiliation | | PENG Jie | Qingdao University of Science and Technology | | YAO Wei | Qingdao University of Science and Technology | | DU Kai | Qingdao University of Science and Technology | | LI Xu-dong | Qingdao University of Science and Technology | | ZHAO Yong-xian | Qingdao University of Science and Technology | | HUANG Bao-chen | Qingdao University of Science and Technology |
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| Abstract: |
| The effect of the conversion rate on the composition，micro-structure and properties of high trans-butadiene-isoprene copolymer rubber，which was synthesized in a 10 L autoclave using TiCl4/MgCl2 as supported catalyst，was investigated.It was found that when the initial mole ratio of butadiene/isoprene was 0.2，the average mole fraction of butadiene unit in copolymer decreased as the conversion rate increased；the conversion rate had little effect on the micro-structure of copolymer，and the mole fraction of the trans-1，4-structure in butadiene unit was always greater than 0.98 and that in isoprene unit was always greater than 0.97 at different conversion rates；the greater conversion rate gave the improved tensile strength of raw copolymer，but similar elongation at break and hardness；and a vulcanizate with excellent comprehensive properties was obtained when the copolymer was synthesized at 60% conversion rate. |
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