摘要
在癸二酸中复配一定质量的甲基四氢苯(MeTHPA)或桐油酸酐(TOA)作为环氧沥青的固化剂,利用拉伸强度、针入度、DSC、DMTA测试,并结合拉伸破坏断面的光学显微镜和SEM分析,研究了复配固化剂对环氧沥青材料力学性能、固化热力学行为、固化体系微观结构等的影响。结果表明:复配固化剂MeTHPA和TOA的加入可以有效提高环氧沥青固化体系的拉伸强度和高温强度,缩短固化反应的诱导期,使固化反应由单独使用癸二酸的两步反应变为一步反应;可以同时提高环氧沥青固化体系中沥青相和环氧树脂相的玻璃化温度,增加固化体系的高温阻尼性能,也会使沥青在环氧树脂中的分散粒径变得不匀,固化体系拉伸断裂时由韧性断裂转为半脆性断裂。相对于复配TOA而言,在癸二酸中复配MeTHPA的影响更明显。
Methyl-tetrahydrophthalic anhydride(MeTHPA) or tung oil anhydride(TOA) is added in decanedioic acid,which is taken as the epoxy-asphalt curing agent.Tensile strength,penetration,DSC,DMTA,torn section microscopy photos and SEM analysis are used to investigate the mechanical properties,thermodynamic behavior,and micro-structure of epoxy-asphalt curing systems under different curing agents.The results show that: the compound curing agent can make strength and surface hardness of the epoxy-asphalt curing system effectively improved,the induction period of the curing reaction shorten,and the curing reaction mechanism turn to one-step reaction from two-step reaction;the compound curing agent can make the glass transition temperature of asphalt phase and epoxy phase simultaneously increased,and high-temperature damping performance also improved,but the particle size of asphalt dispersed in epoxy resin become uneven,and the curing system become semi-brittle from toughness.Compared with compound TOA,the effects of MeTHPA in decanedioic acid are more obvious.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2013年第4期601-605,617,共6页
Journal of Chongqing Jiaotong University(Natural Science)
