超声波实时监测乙烯基酯树脂固化反应过程  

In-situ measurement of the curing behavior of vinyl-ester resin by ultrasonic wave propagation

作　　者：陶博然[1] 郭婵[1] 李建新[1] 吴晓青[2] 何本桥[1] 解孝林[3] 曾繁涤[3] 

机构地区：[1]天津工业大学材料科学与化学工程学院,天津300160 [2]天津工业大学先进纺织复合材料教育部重点实验室,天津300160 [3]华中科技大学化学与化学工程学院,武汉430074

出　　处：《复合材料学报》2009年第3期73-77,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(2067610020876115);国家安全重大基础研究项目子专题(61337-02-05-02);教育部新世纪人才支持计划(NCET-06-0250)

摘　　要：采用超声波纵波透射法对乙烯基酯树脂固化反应过程进行了实时在线监测,准确测量了超声波在树脂体系中的传播速度及振幅衰减,研究了不同厚度树脂的固化反应过程及其储能模量和固化度的变化。实验显示,随着固化反应进行,超声波声速增加,振幅衰减先增大后降低。超声波声速变化与固化过程中体系力学性能的变化有关,通过声速与振幅衰减能实时获取体系的储能模量、凝胶时间及固化度。结果表明,超声波技术能够实时监测树脂体系的固化过程和性能变化,对树脂类复合材料的制备工艺和性能研究有重要的指导作用。The non-invasive longitudinal ultrasonic transmission technique was employed to in-situ monitor the curing behavior of the vinyl - ester resin in the molds with different thicknesses. The gel time, storage modulus and the curing reaction degree of resin were measured by the longitudinal ultrasonic wave technique. The results show that the ultrasonic transmission signals can reliably reflect the curing reactions of vinyl - ester resin. The gel time, changes of storage modulus and the reaction degree with the curing time can be in-situ achieved from the variations of velocities and attenuation of longitudinal ultrasonic waves. The ultrasonic technique is a useful tool for noninvasive, in-situ and real time investigation of curing reaction processes of resin-based composites.

关 键 词：超声波 透射法 乙烯基酯树脂 固化反应 固化度 

分 类 号：TQ127.11[化学工程—无机化工] TQ577.37