改性环氧树脂制备的热固性环氧沥青材料性能  

Properties of thermosettting epoxy asphalt materials prepared from modified epoxy resin

作　　者：黄坤[1] 夏建陵[1,2] 丁海阳[1] 

机构地区：[1]中国林业科学研究院林产化学工业研究所,江苏南京210042 [2]国家林业局林产化学工程重点开放性实验室,江苏南京210042

出　　处：《热固性树脂》2010年第1期35-39,共5页Thermosetting Resin

基　　金：【基金项目】国家自然科学基金项目资助（30771691）.

摘　　要：采用改性环氧树脂和脂肪族多元羧酸固化剂（由C22：三元酸和二聚脂肪酸固化剂复配而成）及石油沥青制备了热固性环氧沥青材料。通过力学性能测试、DSC及扫描电镜研究了沥青含量对环氧沥青固化物拉伸性能、玻璃化温度、固化反应活性及相结构的影响。结果表明，沥青质量分数为44％的环氧沥青固化物的拉伸强度达8．37MPa，断裂伸长率达223．50％，玻璃化温度22．25℃，吸水率为0．2％。随着沥青含量的增加，沥青作为分散相的粒径越来越大，因而环氧沥青材料的拉伸强度降低。沥青含量的增加对固化物的玻璃化温度没有显著的影响。有沥青的环氧固化体系的反应活化能要小于无沥青的环氧固化体系。Thermosetting epoxy asphalt materials were prepared by using petroleum asphalt, modified epoxy resin, curing agents aliphatic polycarboxylic acid complexed from tribasic acid and dimeric fatty acid. The effects of asphalt content on tensile strength, glass tansition temperature, curing reactivity and phase structure were investigated by mechanical property test, DSC and SEM analysis. The results showed that the tensile strength, elongation at break, glass tansition temperature and water absorption of the epoxy asphalt curing product with 44% asphalt were 8.37 MPa, 223.50% , 22.25 ℃and 0.2% respectively. The particle size of asphalt as dispersed phase was increasing with the asphalt content increasing and led to the decrease of tensile strength. The asphalt content had little effect on the glass tansition temperature. The activation energy of epoxy asphalt was lower than that of without asphalt systems.

关 键 词：环氧沥青 改性环氧树脂 固化剂 拉伸性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]