文章摘要
Effect of Structure Regulator DTHFP on Microstructure of SSIR
Received:September 18, 2019  Revised:September 18, 2019
DOI：10.12136/j.issn.1000-890X.2019.11.0803
Key Words: DTHFP；structure regulator；SSIR；anionic polymerization；microstructure
Author NameAffiliationE-mail
WANG Xu Dalian Maritime University 924402612@qq.com 
WANG Wenheng Dalian Maritime University  
LIAO Mingyi* Dalian Maritime University liaomy2000@sohu.com 
WANG Xue Yanshan Branch，Beijing Research Institute of Chemical Industry，SINOPEC  
LI Bohong Yanshan Branch，Beijing Research Institute of Chemical Industry，SINOPEC，  
LIANG Aimin Yanshan Branch，Beijing Research Institute of Chemical Industry，SINOPEC，  
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Abstract:
      A styrene （St ）-isoprene （Ip ） rubber （SSIR） was synthesized by living anionic polymerization using cyclohexane as solvent，n-butyllithium as initiator，and new structure regulator 2，2-di （2-tetrahydrofuryl）propane（DTHFP），and DTHFP was compared with conventional structure regulators， tetrahydrofuran and ethyl tetrahydrofurfuryl ether. The effects of the addition level of DTHFP，the weight ratio of St/Ip，the reaction time and temperature on the microstructure of the SSIR were investigated. The results showed that the content of 3，4-Ip structural units in SSIR increased with the increase of the addition level of structural regulator. Among the three structure regulators，DTHFP had the strongest regulation ability，and when the molar ratio of DTHFP/n-BuLi was at 0. 5，the mass fraction of 3，4-Ip structural units reached as high as 0. 680 5. DTHFP could increase the polymerization rate of St and Ip monomer，and the ability to adjust St monomer was stronger. The change of weight ratio of St/Ip had little effect on the microstructure，and the effect of lowering the reaction temperature appropriately was equivalent to increasing the addition level of DTHFP.
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