乙丙共聚型黏度指数改进剂剪切稳定指数的影响因素
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摘要
采用连续聚合工艺制备了乙丙共聚型黏度指数改进剂,考察了相对分子质量及其分布、乙烯含量及序列结构对其剪切稳定指数(SSI)的影响。结果表明,在研究范围内,增加乙烯含量、降低相对分子质量及其分布,均有助于SSI的降低,提高黏度指数改进剂的剪切稳定性。另外,乙烯平均序列长度的增加及丙烯平均序列长度的下降均有助于SSI的下降。
Ethylene-propylene copolymer viscosity index improver was prepared by continuous polyme-rization. The effects of relative molecular weight and its distribution, ethylene content and sequence structure on shear stability index(SSI) were investigated. The results showed that both the increase of ethylene content and the decrease of relative molecular weight and its distribution were helpful to the decrease of SSI, and the better the shear stability of the viscosity index improver was, in research scope. In addition, both the increase of the average sequence length of ethylene and the decrease of the average sequence length of propylene contributed to the decrease of SSI.
Ethylene-propylene copolymer viscosity index improver was prepared by continuous polyme-rization. The effects of relative molecular weight and its distribution, ethylene content and sequence structure on shear stability index(SSI) were investigated. The results showed that both the increase of ethylene content and the decrease of relative molecular weight and its distribution were helpful to the decrease of SSI, and the better the shear stability of the viscosity index improver was, in research scope. In addition, both the increase of the average sequence length of ethylene and the decrease of the average sequence length of propylene contributed to the decrease of SSI.
引文
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[4]肖奇,张东恒,刘洋,等. 热氧化降解法提高乙丙共聚物黏度指数改进剂抗剪切性能的研究[J]. 润滑油,2011,26(S 1):28-32.
[5]李凡彬,王稳,李维,等. 高温热降解提高乙丙共聚物黏度指数改进剂性能的试验研究[J]. 润滑与密封,2016,41(4):86-90.
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[7]杨雨富,孙聚华,车浩,等. 国内外OCP类黏度指数改进剂的结构与使用性能对比研究[J]. 弹性体,2018,28(4):56-59.
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[13]彭级合,孙利英. 几种乙烯丙烯共聚物粘度指数改进剂的性能考察和比较[J].山东化工,2006,35(1):13-14.
[14]Tanveer S, Prasad R. Enhancement of viscosity index of mineral base oils[J]. Indian Journal of Chemical Technology,2006,13(4):398-403.
[15]王国金,朱和菊,陈月珠,等. 分子结构对高剪切率下乙烯丙烯共聚物粘度指数改进剂流变性能的影响[J]. 摩擦学学报,2000,20(2):139-142.
[16]卢全. 乙丙共聚物润滑油黏度指数改进剂的研制[D]. 兰州:西北师范大学,2010:11-14.
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[18]王国金,朱和菊,叶元凯,等. OCP粘度指数改进剂分子结构与剪切安定性能的影响[J]. 润滑与密封,1999, 24(6):22-25.
[19]Isaac D R, Ashish S. Solution viscosities of ethylene-propylene copolymers in oils[J]. Journal of Applied Polymer Science,1990,40(3/4):523-530.
[20]Zhang Mingzhen, Duhamel J. Study of the microcrystallization of ethylene-propylene random copolymers in solution by fluore-scence[J]. Macromolecules,2007,40(3):661-669.
[21]Carman C J, Harrington R A, Wikes C E. Monomer sequence distribution in ethylene-propylene rubber measured by 13C-NMR:Use of reaction probability model[J]. Macromolecules,1977,10(3):536-544.
[22]Randall J C. Methyl sequence distributions and number average sequence lengths in ethylene-propylene copolymers[J]. Macromolecules,1978,11(1):33-36.
[2]Mortier R M, Orszulik S T. Chemistry and technology of lubricants[M]. Springer Dordrecht,1997:149-152.
[3]郎强,孟宪坤,杨磊,等. 乙烯含量对黏度指数改进剂性能的影响[J]. 弹性体,2016,26(4):68-70.
[4]肖奇,张东恒,刘洋,等. 热氧化降解法提高乙丙共聚物黏度指数改进剂抗剪切性能的研究[J]. 润滑油,2011,26(S 1):28-32.
[5]李凡彬,王稳,李维,等. 高温热降解提高乙丙共聚物黏度指数改进剂性能的试验研究[J]. 润滑与密封,2016,41(4):86-90.
[6]张丙伍,顾永建,汪利平,等. 黏度指数改进剂对基础油性能的影响[J]. 润滑与密封,2014,39(12):125-128.
[7]杨雨富,孙聚华,车浩,等. 国内外OCP类黏度指数改进剂的结构与使用性能对比研究[J]. 弹性体,2018,28(4):56-59.
[8]蒋成德. 乙丙共聚物(OCP)黏度指数改进剂原料优选[J]. 中外能源,2009,14(9):78-83.
[9]崔华,郭扬,孙文秀,等. 润滑油黏度指数改进剂用乙丙共聚物研究进展[J]. 弹性体,2016,26(5):89-92.
[10]张佳荃,李炜,辛长波. 润滑油粘度指数改进剂的制备[J]. 大连大学学报,2011,32(3):22-25.
[11]徐成,金玉新,王勇. 影响乙丙共聚物黏度指数改性剂剪切稳定性指数因素的分析[J]. 润滑油,2010,25(4):45-47.
[12]蔡小平,邹向阳,张红江,等. 用于润滑油改性的乙丙共聚物的合成[J]. 弹性体,2000,10(3):1-4.
[13]彭级合,孙利英. 几种乙烯丙烯共聚物粘度指数改进剂的性能考察和比较[J].山东化工,2006,35(1):13-14.
[14]Tanveer S, Prasad R. Enhancement of viscosity index of mineral base oils[J]. Indian Journal of Chemical Technology,2006,13(4):398-403.
[15]王国金,朱和菊,陈月珠,等. 分子结构对高剪切率下乙烯丙烯共聚物粘度指数改进剂流变性能的影响[J]. 摩擦学学报,2000,20(2):139-142.
[16]卢全. 乙丙共聚物润滑油黏度指数改进剂的研制[D]. 兰州:西北师范大学,2010:11-14.
[17]姜晓明. 乙丙共聚物润滑油粘度指数改进剂的研制[D]. 北京:北京化工大学,2000:28-33.
[18]王国金,朱和菊,叶元凯,等. OCP粘度指数改进剂分子结构与剪切安定性能的影响[J]. 润滑与密封,1999, 24(6):22-25.
[19]Isaac D R, Ashish S. Solution viscosities of ethylene-propylene copolymers in oils[J]. Journal of Applied Polymer Science,1990,40(3/4):523-530.
[20]Zhang Mingzhen, Duhamel J. Study of the microcrystallization of ethylene-propylene random copolymers in solution by fluore-scence[J]. Macromolecules,2007,40(3):661-669.
[21]Carman C J, Harrington R A, Wikes C E. Monomer sequence distribution in ethylene-propylene rubber measured by 13C-NMR:Use of reaction probability model[J]. Macromolecules,1977,10(3):536-544.
[22]Randall J C. Methyl sequence distributions and number average sequence lengths in ethylene-propylene copolymers[J]. Macromolecules,1978,11(1):33-36.