超声在线监测不饱和聚酯树脂固化过程及其动力学行为  

In-situ ultrasonic monitoring of curing process and kinetics of unsaturated polyester resin

作　　者：李建新[1] 黄港 高中琦 张恒宁[2] 陶博然 LI Jianxin;HUANG Gang;GAO Zhongqi;ZHANG Hengning;TAO Boran(School of Material Science and Engineering,Tiangong University,Tianjin 300387,China;Xi′an Institute of Modern Chemistry,Xi′an 710065,China;Hunan Aerospace Huanyu Communication Technology Co.,Ltd.,Changsha 410205,China)

机构地区：[1]天津工业大学材料科学与工程学院,天津300387 [2]西安近代化学研究所,西安710065 [3]湖南航天环宇通信科技股份有限公司,长沙410205

出　　处：《天津工业大学学报》2024年第5期51-58,共8页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(22278318)。

摘　　要：为探索不饱和聚酯树脂(UPR)固化体系在不同温度下的超声振幅变化规律,采用超声波穿透技术对UPR固化过程进行在线监测,获得声速、储能模量、松弛时间、凝胶时间等动力学参数变化规律,并得到固化反应动力学方程。结果表明:温度越高,声速与储能模量变化越快,且最终数值也越大,而固化松弛时间与凝胶时间随温度增加而缩短;此外,超声法与差示扫描量热法(DSC)得到的固化度曲线变化高度一致,通过2种方法所得到的反应活化能分别为38.14 kJ/mol和45.3 kJ/mol;最终,通过DSC法确定了UPR固化反应动力学级数为0.92。总之,超声法与DSC法2种方法相互结合,不仅证明了超声结果的准确性,也为UPR固化过程提供一种精准的在线监控技术和量化方法,从而为UPR生产过程提供理论指导。In order to explore the changes in ultrasonic amplitude of unsaturated polyester resin(UPR)curing system at different temperatures,the curing process of UPR was online monitored by ultrasonic transmission technology.The dynamic changes of sound velocity,energy storage modulus,relaxation time and gel time were obtained.Then the dynamics equation of the curing reaction was obtained.The results show that the higher the temperature,the faster the change of sound velocity and energy storage modulus,and the larger the final value.Meanwhile,the curing relaxation time and gel time decrease with the increase of temperature.In addition,the curves of curing degree obtained by the ultrasonic method and DSC method are highly consistent.The activation energies obtained by the two methods are 38.14 kJ/mol and 45.3 kJ/mol,respectively.Finally,the kinetic order of the curing reaction of UPR determined by DSC is 0.92.In conclusion,the combination of the ultrasonic method and DSC method not only proves the accuracy of ultrasonic results,but also provides an precise online monitoring technology and quantitative method for the UPR curing process,thus providing theoretical guidance for the UPR production.

关 键 词：超声在线检测 差示扫描量热仪 不饱和聚酯树脂 固化度 固化反应动力学 

分 类 号：TB553[理学—物理] TQ316.337[理学—声学]