不同分子量的PEI对乙烯基酯树脂力学性能的影响  

Effect on Mechanical Properties of Vinyl Ester Resins Modified by PEI of Different Molecular Weight

作　　者：郝志勇[1] 李玲[1] 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051

出　　处：《塑料》2008年第2期66-69,共4页Plastics

基　　金：山西省自然科学基金(20051014)

摘　　要：制备了4种分子量不同的刚性聚醚酰亚胺齐聚物(PEI),研究了不同分子量的PEI改性乙烯基酯树脂对其固化物力学性能的影响。结果表明:分子量不同的PEI在最佳含量改性乙烯基酯树脂固化物时弯曲强度变化不大,均在105MPa左右;冲击韧性则有大幅度的提高,其中当PEI相对分子质量为1373.1,特性黏度为5.3dL/g,质量含量占15%时,冲击韧性达到16.8kJ/m2,约为未改性树脂(冲击韧性为3.8kJ/m2)的5倍。Four kinds of polyimide oligmer（PEI） of different molecular weight were prepared, and effect on mechanical properties of cured vinyl ester resins modified by PEI of different molecular weight were studied. The results showed that flexural strength of the cured vinyl ester resins modified by PEI of different molecular weight in the best proportion were not improved much, and was almost 105MPa; but its impact strength were very sharp increased. When relative molecular weight of PEI was 1373.1, intrinsic viscosity number was 5.3dL/g and its weight was 15% , impact strength reached 16. 8kJ/m^2, nearly 5 times than original resins（its impact strength was 3.8kJ/m^2）.

关 键 词：分子量 PEI 乙烯基酯树脂 力学性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]