详细研究了ePTFE(expanded Poly-Tetra-Fluoro-Ethylene,多孔聚四氟乙烯)增强相含量对复合质子交换膜力学性能的影响.结果表明,增强相ePTFE体积分数对ePTFE/Nafion复合质子交换膜的物理增强存在一个阈值,其理论数值约为20.7%.当ePTFE增强相含量低于该值时,复合膜的断裂强度随ePTFE含量增加而减小;当ePTFE增强相含量高于该值时,复合膜的断裂强度随ePTFE含量增加而增大.ePTFE/Nafion复合质子交换膜的屈服强度随ePTFE含量的变化也表现出类似规律.
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