摘要
采用聚丙二醇(PPG)和4,4'-二苯基甲烷二异氰酸酯(MDI)为反应原料,制备端异氰酸根聚氨酯(PU)预聚体,并利用它对E-51型环氧树脂进行接枝改性,制得PU预聚体与E-51型环氧树脂的接枝共聚物(g-PU/EP)。采用非等温差示扫描量热(DSC)法研究其与二聚酸聚酰胺固化剂的固化动力学。研究表明:固化体系的活化表观能为66.10 kJ/mol,反应级数为0.930。固化反应的凝胶温度、固化温度和后固化温度分别为310.77、364.62和397.18 K。
Polypropylene glycol （PPG） and 4,4＇-diphenylmethane diisocyanate （MDI） were used as raw materials for the synthesis of isocyanate terminated polyurethane （PU） prepolymer.Then,PU prepolymer was used to graft E-51 epoxy resin to obtain graft PU/EP（g-PU/EP）.The curing kinetics of g-PU/EP and dimer acid based polyamide curing agent was investigated by non-isothermal differential scanning calorimetry （DSC） test.The curing reaction apparent activation energy of curing system was 66.10 kJ/mol,curing reaction order 0.930,the gel temperature 310.77 K,curing temperature 364.62 K,and postcuring temperature 397.18 K.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2014年第2期95-100,共6页
Journal of Nanjing Tech University(Natural Science Edition)
关键词
聚氨酯预聚体
环氧树脂
接枝
二聚酸聚酰胺固化剂
固化动力学
polyurethane prepolymer
epoxy resin
graft modification
dimer acid based polyamide curing agent
curing kinetics
