摘要
采用CCS和MRV对OCP粘度指数改进剂的低温性能进行了测试,并将分析结果与粘度指数改进剂的分子结构进行了关联,发现随着分子量的增加,低温性能下降,随着分子量分布增宽和高分子链中乙基序列的增加,低温性能改善.从高分子的立体化学结构层次进行了结构与性能关系的分析.
The cold cranking property and pump - abiliy at low temperature of Olefin Copolymer (OCP) viscosity index improvers were measured both at CCS (Cold Cranking Simulator) and at MRV (MiniRotary Viscometer), and the performances were related with the molecular structure determined with 13C - NMR and Gel Permeation Chromatography. The result indicates that molecular weight increment will make subzero -property worse, broader distribution of molecular weight and higher mole fraction of ethylene sequence in molecular will make srbzero - property improved. The relationship between perfoumance and structure of OCP has been probed from stereoscopic chemistry of polymer.
出处
《润滑与密封》
CAS
CSCD
北大核心
1999年第6期26-29,共4页
Lubrication Engineering
关键词
粘度指数改进剂
流变性能
分子结构
低温性能
Viscosity Index Improver Rheology Molecular Structure Subzero - property
