叠层法制备环氧树脂梯度交联聚合物及其性能

Lamination Method to Prepare Epoxy Resin Gradient Crosslinked Polymers and Its Properties

以α,ω-对苯甲胺基聚乙二醇、聚醚胺D400和双酚A环氧树脂(DGEBA)为原料,通过叠层法制备了玻璃化转变温度范围最大可达80℃且峰值半高宽为47.26℃的梯度聚合物材料。通过扫描电镜、拉力试验机和高级扩展流变仪研究了固化剂组分对制备的梯度交联聚合物材料结构、力学性能和阻尼性能的影响规律。结果表明,通过调整单层聚合物的交联密度即可得到适用于不同使用温度范围的宽玻璃化转变温度且力学性能优异的无微相分离结构的梯度交联聚合物材料。梯度交联聚合物tanδ>0.3的有效阻尼温域为41.54℃,且处于室温工作温度范围内。

A laminated gradient polymer with broad damping temperature was prepared using diglycidyl ether of bisphenyl A epoxy resin （DGEBA） and two kinds of curing agents, i.e. a, co-para-phenylmethylamino polyethylene glycol（PMAPEG） and polyoxypropylene diamines （D400）. The gradient polymer obtained exhibits a wide transition range spanning over 80 ℃ and peak half-width of 47.26 ℃. The influence of mixture curing agent component ratio on the morphology, mechanical behaviors and dynamic mechanical properties of PMAPEG-D400/DGEBA gradient polymers was investigated by the scanning electron microscopy, tensile testing machine and advanced extension rheometer. The results show that the homogeneous epoxy resin laminated gradient polymers without microphase separation are available. The width glass transition temperature laminated gradient polymers suit for different temperature range and with excellent mechanical properties can obtained by simply adjusting the crosslink density of the single-layer polymer. It is worth nothing that, the effective damping temperature （tanδ 〉0.3） of the gradient polymer is 41.54 ℃ and the gradient polymer can work in the range of room temperature.