环氧树脂固化过程中的黏弹性分析

摘要

Epoxy resins form the matrix in filled plastics and fiber-reinforced composites used in a diversity of products.These range from consumer items and auto body panels to advanced composites for printed circuit boards (PCBs),aerospace structural components,and high-per-formance sports equipment.As the curing reaction progresses,the two moduli cross at the gel point,beyond which the storage modulus becomes larger than the loss modulus and the materi-al hardens.These techniques provide a greater understanding of traditionally complex thermo-set processes and effective quality control measures for these processes,and will reduce design and operating costs in associated industries.%环氧树脂在电子线路板、航空工业以及高性能运动器材行业有着广泛的应用，其成型工艺普遍采用反应注射浇铸成型技术，注射温度及时间、保温温度及时间对得到尺寸满意的制品具有重要意义。通过升温测试，获得了树脂黏度和动态模量对温度的演变关系；通过一系列不同温度的保温测试，获得了凝胶化时间对温度的关系。结果表明，可以通过黏弹性能有效示踪固化过程中的结构演变，从而为反应成型加工提供有效、有用的工艺参数。