聚(甲基丙烯酸甲酯-1-癸烯)黏度指数改进剂的可控合成

摘要以Schiff碱Ni配合物为催化剂,二甲苯为溶剂,研究偶氮二异丁腈(AIBN)引发甲基丙烯酸甲酯与1-癸烯自由基聚合的共聚反应。采用单因素法优化聚合反应的工艺条件,通过GPC、FT-IR、¹H NMR、TGA对聚合物进行结构表征和性能测试,并考察其黏温性能。结果表明:在90℃,1-癸烯与MMA的质量比为1∶2,引发剂用量占总单体质量的0.5%,催化剂与引发剂物质的量之比为1∶100,反应时间为10 h时,催化活性为1.021×10⁵ g·mol^-1·h^-1。共聚物(PDM)的数均相对分子质量范围为1.05×10⁴~1.26×10⁴,多分散性指数PDI范围为1.31~1.82,该反应具有可控性。共聚物在温度为264℃时开始分解,说明聚合物具有良好的热稳定性。将PDM以0.5%的用量加入到玉门润滑油基础油中,可使油品的黏度指数增加31,共聚物PDM可作为一种黏度指数改进剂。

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	丁丽芹
	刘思凡
	刘欣怡
	徐海升
	梁生荣

关键词： Schiff碱可控合成 1-癸烯甲基丙烯酸甲酯黏度指数改进剂

Abstract： The copolymerization of methyl methacrylate and 1-decene initiated by azodiisobutyronitrile (AIBN) in xylene solution was studied using Schiff base Ni complex as catalyst. The process conditions of the polymerization reaction were optimized by single factor method. The structure and properties of the polymer were characterized by GPC, FT-IR, ¹H NMR and TGA, and its viscosity-temperature performance was evaluated. The results show that when the mass ratio of 1-decene to MMA is 1∶2, the amount of initiator is 0.5% of the total monomer mass, and the molar ratio of catalyst to initiator is 1∶100 at 90 ℃ for 10 h,the catalytic activity is 1.021×10⁵ g·mol^-1·h^-1. The number average molecular weight of the copolymer (PDM) ranges from 1.05×10⁴ to 1.26×10⁴ and the polydispersity index PDI ranges from 1.31 to 1.82, the reaction is controllable. The initial decomposing temperature of copolymer is 264 ℃, indicating that the polymer has good thermal stability. Adding 0.5% copolymer to the Yumen lubricating base oil can increase the viscosity index by 31. Therefore, the copolymer PDM can be used as a viscosity index improver.

Keywords： Schiff-base controllable synthesis 1-decene methyl methacrylate viscosity index improver

Received 2023-02-20;

Fund:陕西省自然科学基础研究计划项目(2022JM-078,2023-JC-YB-118);西安石油大学青年科研创新团队项目(2019QNKYCXTD16);西安石油大学研究生创新与实践能力培养计划(YCS22213108)资助。

Corresponding Authors: 丁丽芹,教授,lqding@xsyu.edu.cn Email: lqding@xsyu.edu.cn

About author: 丁丽芹(1974—),女,博士,教授,现从事润滑油及添加剂和烯烃聚合方面的研究。

引用本文:

丁丽芹, 刘思凡, 刘欣怡, 徐海升, 梁生荣.聚(甲基丙烯酸甲酯-1-癸烯)黏度指数改进剂的可控合成[J]. 化学工业与工程, 2025,42(1): 32-40

DING Liqin, LIU Sifan, LIU Xinyi, XU Haisheng, LIANG Shengrong.Controllable synthesis of poly (methyl methacrylate-1-decene) as viscosity index improver[J]. Chemcial Industry and Engineering, 2025,42(1): 32-40

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