不同相对分子质量聚异丁烯对无灰分散剂性能的影响

石油炼制与化工 ›› 2021, Vol. 52 ›› Issue (9): 56-62.

不同相对分子质量聚异丁烯对无灰分散剂性能的影响

苏飞铭¹,施岩¹,赵厚瑞¹,王一鸣¹,孙尚琪¹,陈春²,潘英楠³

1. 辽宁石油化工大学石油化工学院
2. 辽宁抚清助剂有限公司
3. 中国石化扬子石油化工有限公司

收稿日期:2021-01-06 修回日期:2021-05-14 出版日期:2021-09-12 发布日期:2021-08-30
通讯作者: 施岩 E-mail:shiyan1816@163.com

EFFECT OF PIB RAW MATERIALS WITH DIFFERENT MOLECULAR WEIGHTS ON THE PERFORMANCE OF ASHLESS DISPERSANT

Received:2021-01-06 Revised:2021-05-14 Online:2021-09-12 Published:2021-08-30

摘要/Abstract

摘要： 以不同相对分子质量的聚异丁烯（PIB）为原料，与胺、烯酐、稀释剂等在不同条件下反应，制备润滑油无灰分散剂聚异丁烯丁二酰亚胺（PIBSI），并测试其分散性能和抗氧化性能；考察PIB相对分子质量、中间产物聚异丁烯丁二酸酐（PIBSA）的合成工艺对PIBSI性能的影响。结果表明：随着原料PIB相对分子质量的增加，PIBSI的分散性能与抗氧化性能均有提升；与氯化法工艺相比，自由基法工艺不仅能耗低、污染小，而且合成的PIBSI性能更好；其中，由数均相对分子质量为2 300的PIB原料经自由基法工艺制备的PIBSI分散性能最佳，其油泥斑点分散值（SDT）最高可达73.15%。

关键词: 聚异丁烯, 聚异丁烯丁二酰胺, 无灰分散剂, 分散性能

Abstract: Polyisobutylene succinimide (PIBSI), an ashless dispersant for lubricating oil, was prepared by using polyisobutylene (PIB) with different molecular weights as raw materials, reacting with amine, maleic anhydride and diluent under different conditions, and its dispersion and oxidation resistance were tested. The effects on PIBSI properties of PIB with different molecular weights and synthesis process of polyisobutylene succinic anhydride (PIBSA) were investigated. The results show that with the increase of the relative molecular weights of PIB, the dispersion and antioxidant properties of PIBSI are improved. Compared with chlorination process, free radical one-step process can not only reduce energy consumption and pollution, but also improve the performance of PIBSI. Among them, PIBSI prepared from PIB raw materials with number average molecular weight of 2 300 by free radical one-step process has the best dispersion performance, and its oil sludge dot dispersion value (SDT) can reach 73.15%.

Key words: polyisobutene, polyisobutylene succinimide, ashless dispersant, dispersibility

苏飞铭施岩赵厚瑞王一鸣孙尚琪陈春潘英楠. 不同相对分子质量聚异丁烯对无灰分散剂性能的影响[J]. 石油炼制与化工, 2021, 52(9): 56-62.

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