苯乙烯、α-甲基苯乙烯改性C_5石油树脂的研究

Study on Modification of C_5 Petroleum Resin by St/α-Methyl Styrene

以苯乙烯、α-甲基苯乙烯为改性剂,采用阳离子聚合工艺合成了C5石油树脂,对聚合体系、改性剂等因素进行了分析。结果表明,无水AlCl3是引发C5-苯乙烯共聚体系的理想催化剂;苯乙烯与其余可聚单体的质量比在0.4～0.8,或α-甲基苯乙烯与其余可聚单体的质量比在1.0左右时,所得改性C5石油树脂具有良好的色相、软化点以及优异的相容性能;改性石油树脂合适的聚合条件为:进料温度在15～25℃、保温温度在60～70℃,聚合投料时间在1.5～2 h、保温时间1 h。

Styrene or α-methyl styrene were selected as modifiers to adopt polymeric processes of cation to synthesis C5 petroleum resin,then to analyze polymerization,modifiers,and some other factors.It shows that anhydrous AlCl3 is an ideal catalyst for C5-styrene copolymer system and co-polymerization petroleum resin has changed obviously on hue,thermal stability and compatibility when the mass ratio of styrene and other polymer is 0.4~0.8 or the mass ratio of α-methyl styrene and other polymer is around 1.0.The best polymer condition of C5 Petroleum Resin is also described.