二维码（扫一下试试看！） | | 动态扭振法对HTPB/TDI体系固化过程的研究 | | Curing Behaviors of HTPB/TDI System via Dynamic Torsional Vibration Method | | 投稿时间：2017-07-03 | | DOI：10.15918/j.tbit1001-0645.2018.12.013 | | 中文关键词:固化过程动态扭振法固化终点HTPB/TDI黏合剂体系 | | English Keywords:curing processdynamic torsional vibration methodcuring end-pointHTPB/TDI adhesive system | | 基金项目:国家自然科学基金资助项目（U1630142）；基础产品创新计划资助项目（hzy2008001） | | | 摘要点击次数:509 | | 全文下载次数:351 | | 中文摘要: | | 采用动态扭振法研究HTPB/TDI体系的固化过程，获得体系在80，90，100，110℃下时扭矩随固化时间变化关系，发现HTPB/TDI的固化过程分为3个阶段：第1个阶段为液态到凝胶点阶段；第2阶段为凝胶点到高弹态阶段；第3阶段为硬化点到固化终点阶段.根据Flory凝胶化理论计算得到HTPB/TDI体系在TPB催化时固化反应活化能为1.58 kJ/mol，与傅里叶变温红外法根据Arrhenius公式求得的41.98 kJ/mol基本一致.通过ATR漫反射红外对HTPB/TDI胶片进行氢键分析，证实的确发生动态扭振法所得到的固化第3阶段. | | English Summary: | | A dynamic torsional vibration method was applied to on-line monitor the curing behaviour of hydroxyl-terminated polybutadiene/toluene diisocyanate (HTPB/TDI) system at different temperature. According to the diagram of torque change with time, the curing process was divided into three phases:the first phase was the period from liquid stage to the gel point; the second phase was the period from the gel point to the hardening point; the third phase was the period from the hardening point to the curing end-point. During the third stage the internal chemical cross-linking basically completed while the physical cross-linking point still forming. Therefore, the value of torque was growing slowly till the curing end-point. According to the Flory gelation theory, the calculated △Ea of HTPB/TDI system is 41.58 kJ/mol, almost the same result calculated with the FT-IR method. FT-TR method can only reflect the first and the second period of the curing process. And the dynamic torsional vibration method can monitor full-range of the curing process. The infrared diffuse reflectance spectroscopy of HTPB/TDI system validates the dynamic torsional vibration method. | | 查看全文查看/发表评论下载PDF阅读器 | |
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