Frontal Curing of Epoxy Resins: Comparison of Mechanical and Thermal Properties to Batch Cured Materials
Frontal Curing of Epoxy Resins: Comparison of Mechanical and Thermal Properties to Batch Cured Materials
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DOI：
10.1002/(sici)1097-4628(19971107)66:6
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发表时间：
1997-11
期刊：
影响因子：
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通讯作者：
Yuri A. Chekanov;J. Pojman
中科院分区：
文献类型：
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作者：
Yuri A. Chekanov;J. Pojman
双酚 F 环氧树脂二缩水甘油醚 (DGEBF) 采用脂肪胺固化剂 Epicure 3371 以化学计量比进行正面固化和分批固化。使用差示扫描量热法 (DSC) 和动态机械分析 (DMA) 测定玻璃化转变温度 (Tg)。 DMA 还用于研究固化样品的储能模量 (E*) 和 tan δ (tan d)。环氧树脂样品的拉伸性能根据 ASTM D638M-93 进行测试。发现正面固化环氧树脂的性能与间歇固化环氧树脂的性能非常接近。测量纯环氧树脂和填充环氧树脂的固化前沿传播速度。使用橡胶颗粒（磨碎的轮胎）作为填充剂。环氧树脂中允许增长的填料的最大百分比为30%。由于对流，只有下降锋才会传播。讨论了环氧树脂正面固化的优点和缺点。 q 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1209-1216, 1997
The epoxy resin diglycidyl ether of bisphenol F (DGEBF) was cured by the aliphatic amine curing agent Epicure 3371 in a stoichiometric ratio both frontally and in a batch-cure schedule. Glass transition temperatures (Tg) were determined using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). DMA also was used for studying the storage modulus (E*) and tan delta (tan d) of the cured samples. Tensile properties of epoxy samples were tested according to ASTM D638M-93. The properties of the frontally cured epoxy resin were found to be very close to that of batch-cured epoxy resin. Velocity of cure-front propagation was measured for both neat and filled epoxy. Rubber particles (ground tires) were used as a filler. The maximum percentage of filler in the epoxy resin allowing propagation was 30%. Because of convection, only descending fronts would propagate. Advantages and disadvantages of frontal curing of epoxy resins are discussed. q 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1209-1216, 1997