异佛尔酮二异氰酸酯改性蒙脱土改性沥青的性能  

Properties of Asphalt Modified with Montmorillonite After a Modification by Isophorone Diisocyanate

作　　者：肖新颜[1] 张登科[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2017年第2期116-121,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(21376099;21546002);石油化工联合基金资助项目(U1162120)~~

摘　　要：采用异佛尔酮二异氰酸酯(IPDI)对醋酸化蒙脱土(HMMT)进行改性,得到IPDI改性HMMT(IPDI-HMMT);以IPDI-HMMT作为新的沥青化学改性剂,通过熔融共混法制备改性沥青材料;研究了改性沥青的物理性能、UV老化性和热稳定性.结果表明:接枝上—NCO的IPDI-HMMT能与沥青中羟基反应生成氨基甲酸酯,形成剥离结构;IPDIHMMT掺入沥青后,改性沥青材料的起始分解温度提升了9℃,软化点高达57.0℃,且其离析软化点差值及UV老化后质量改变率、软化点增量和残留针入度比的变化均小于Na-MMT改性沥青.IPDI-HMMT与沥青的化学反应加强了内部组分的相互作用而形成稳定的胶体结构,对沥青性能的增强效果优于Na-MMT.Acidified montmorillonite （ HMMT） was modified with isophorone diisocyanate （ IPDI） , and the ob-tained IPDI-HMMT was used as a chemical modifier to modify asphalt via melt blending. Then, the physical pro-perties ,UV aging resistance and thermal stability of the modified asphalt were investigated. The results show that （1） IPDI-HMMT grafted with -NCO can react with the hydroxy in asphalt to produce urethane and to form an ex-foliated structure; （2） after the incorporation of IPDI-HMMT, the initial decomposition temperature of the modified asphalt increases by 9 °C , the softening point is up to 57. 0 °C , and the segregation softening point difference, the mass change rate, the softening point increment and the residual penetration ratio all change more slightly than those of Na-MMT modified asphalt; and （3） the chemical reaction between IPDI-HMMT and asphalt enhances the interaction of the internal components, which helps to form a stable colloidal structure, so that IPDI-HMMT has greater enhancement effect on the asphalt performance than Na-MMT.

关 键 词：异佛尔酮二异氰酸酯 蒙脱土 沥青 化学改性 物理性能 UV老化性能 热稳定性 

分 类 号：TQ316.63[化学工程—高聚物工业]