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 obtained IPDI-HMMT was used as a chemical modifier to modify asphalt via melt blending.Then,the physical properties,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 exfoliated structure; ( 2) after the incorporation of IPDI-HMMT,the initial decomposition temperature of the modified asphalt increases by 9℃,the softening point is up to 57.0℃,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.