文章摘要
Study on Coupling Efficiency of SBS Polymerization
Received:May 23, 2020  Revised:May 23, 2020
DOI：10.12136/j.issn.1000-890X.2021.10.0745
Key Words: SBS；polymerization；coupling efficiency；coupling agent；relative molecular weight；thermal deactivation；self coupling
Author NameAffiliationE-mail
ZHAO Xintong* CNPC Dushanzi Petrochemical Co. zhaoxt_dbxj@petrochina.com.cn 
XIAO Xiaolu CNPC Dushanzi Petrochemical Co.  
SHEN Haiyan CNPC Dushanzi Petrochemical Co.  
WANG Yefei CNPC Dushanzi Petrochemical Co.  
HU Jianbo CNPC Dushanzi Petrochemical Co.  
ZHENG Bao CNPC Dushanzi Petrochemical Co.  
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Abstract:
      The solution polymerization process and mechanism of styrene-butadiene-styrene block copolymer（SBS） were introduced.The coupling efficiency and other parameters were obtained by the gel permeation chromatography spectrogram of SBS product.The reasons for the abnormal coupling efficiency were analyzed according to the polymerization process.By setting the appropriate addition amount of coupling agent，adjusting the sequence control program and process parameters，regularly overhauling the coupling agent flow control valve，controlling the final reaction temperature and other measures，the coupling efficiency of SBS polymerization could be effectively controlled，the quality stability of SBS products were ensured.
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