石油化工2026，Vol.55Issue(8)：1181-1186,6.DOI:10.3969/j.issn.1000-8144.2026.08.007
对市售热塑性弹性体SEEPS产品的剖析研究
Analysis of commercially available SEEPS thermoplastic elastomer products
摘要
Abstract
Given the absence of domestic SEEPS production,this paper selected three commercially available imported products from the same SEEPS series to investigate their structure,properties,and synthesis mechanism.The structure and properties of these products were characterized by NMR,DSC,GPC,and ICP,and they were compared with a synthetic sample.The experimental results show that the three products exhibit Mn of(9-24)×104,polydispersity index less than 1.13,unimodal distribution,nearly 100%hydrogenation degree of diene segments,a butadiene-to-isoprene mass ratio of approximately 30∶40,styrene content of 28%-30%(w),elongation at break more than 500%,and a glass transition temperature of approximately-58℃.The crystallization temperature and melting temperature increase with the increasing molecular weight of the products.The hydrogenation catalyst system consists of an organic acid nickel as the main catalyst and triisobutyl aluminium or triethyl aluminium as the co-catalyst.Further analysis indicates that SEEPS is obtained by first performing anionic polymerization to produce a styrene-isoprene/butadiene-styrene block copolymer(SIBS)and then catalytic hydrogenation of SIBS.In this process,styrene and the conjugated dienes(i.e.,butadiene/isoprene)are added separately,while butadiene and isoprene are added together in a one-step feeding method.关键词
SEEPS/苯乙烯/氢化度/加氢催化剂Key words
SEEPS/styrene/hydrogenation degree/hydrogenation catalyst分类
化学化工引用本文复制引用
毛远洪,刘瑞,马红卫..对市售热塑性弹性体SEEPS产品的剖析研究[J].石油化工,2026,55(8):1181-1186,6.基金项目
中国石化集团茂名石油化工有限公司自筹项目基金(MPBC240049,MPBC230066). （MPBC240049,MPBC230066）
