对黏度指数改进剂氢化苯乙烯／共轭二烯烃（丁二烯、异戊二烯）共聚物（HSD）进行了FT—IR、1H—NMR和DSC测试，研究表明，HSD是一种高度氢化的高丁二烯含量的苯乙烯-丁二烯嵌段共聚物，苯乙烯的质量分数为1850％，丁二烯的质量分数为81．50％，丁二烯氢化度为98．20％。通过凝胶色谱GPC测试，HSD12F数均分子量为4．59×10^5g／mol，单臂数均分子量为6．47×10^5g／mol，表明HSD12F是一种星型的苯乙烯．丁二烯嵌段共聚物，其臂数为7．10，耦合效率为86．44％，耦合效率越高，增粘性能越好。通过DSC测试，表明HSD12F软段氢化丁二烯的玻璃化转变温度为-76℃，不存在微晶结构。
molecular structure of viscosity index improver polystyrene-polydiene block copolymer (HSD) is tested by FITR and 1H NMR. The results show that HSD is a kind of highly hydrogenated and high butadiene content of the polystyrene-polydiene block copolymer. The mass fraction of styrene and butadiene is 18.50% and 81.50 % respectively, and the hydrogenate degree of butadiene is 98. 20%. Tested by geI permeation chromatography (GPC), the number average molecular of HSD12F is 459,000 g/mol, and the singe arm number average molecular is 64 700. it shows HSD12F is a star polystyrene-polybutadiene block copolymer, the number of arms is 7.10, and coupling efficiency is 86.44 %. With the coupling efficiency increasing, the thickening ability gradually increases. By DSC test, it shows that the glass transition temperature of HSD12F hydrogenated polybutadiene is - 76 Z; and the microcrystalline structure does not exist.
参考文献
| [1] | 高敬民,马道林,贾汝涛,王小波,张丽,曹旭.黏度指数改进剂的最新研究进展[J].润滑油,2011(05):1-6,11. |
| [2] | 李林,周涛,周维燕,陈正广,惠江涛,张爱民.黏度指数改进剂HSD的增粘机理[J].高分子材料科学与工程,2012(01):48-51. |
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