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Citation: WANG Feng, ZHANG Chunyu, ZHANG Hexin, BAI Chenxi, ZHANG Xuequan. Synthesis of Polyisoprene with Narrow Relative Molecular Mass Distribution Using Nd(OiPr)₃-based Catalytic System[J]. Chinese Journal of Applied Chemistry, ;2014, 31(6): 654-660. doi: 10.3724/SP.J.1095.2014.30420 shu

Synthesis of Polyisoprene with Narrow Relative Molecular Mass Distribution Using Nd(OiPr)₃-based Catalytic System

WANG Feng ^a,b ,
ZHANG Chunyu ^a,, ,
ZHANG Hexin ^a ,
BAI Chenxi ^a ,
ZHANG Xuequan ^a,,

1.
a Research Center of High Performance Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
b Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: ZHANG Chunyu, ZHANG Xuequan,
Received Date: 21 August 2013
Available Online: 18 September 2013
Fund Project: 国家自然科学基金青年基金(51203147)资助项目 (51203147)

The effects of chloride donor and aging temperature of neodymium isopropoxide/diisobutylaluminum hydride/chloride donor(Nd(OiPr)₃/Al(iBu)₂H/RCl) catalyst on isoprene polymerization were investigated.The resulting polymer was fully assessed by NMR,IR and GPC.Chloride donors greatly influenced the relative molecular mass distribution(MWD) of plyisoprene and only Nd(OiPr)₃/Al(iBu)₂H/Me₂SiCl₂ catalytic system could afford polyisoprene with a narrow MWD.In the Nd(OiPr)₃/Al(iBu)₂ H/Me₂SiCl₂ catalytic system,the polymerization results showed that MWD of polyisoprene kept around 1.5 when the catalyst was aged at 0~50℃ and became much broader(MWD >6.0) when the aging temperature was above 50℃.Additionally,the yield and 1,4-content of polyisopere increased with the aging temperature.
- isoprene,
- neodymium-based catalytic system,
- chloride donors,
- aging temperature,
- relative molecular mass distribution
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Synthesis of Polyisoprene with Narrow Relative Molecular Mass Distribution Using Nd(OiPr)₃-based Catalytic System