Research on epoxy resin waterproof sealing material modified by polyether grafting and toughening
Polyethylene glycol monomethyl ether with molecular weight of 650 was used for the grafting and toughening modi-fication of epoxy resin.Infrared spectrum and effective grafting rate analysis showed that the flexible polyether chain segments were effectively grafted into the epoxy resin matrix,and the effective grafting rate reached 70.1％～84.9％.The impact strength and elongation at break of the modified epoxy resin significantly increased with the increase of the amount of polyether grafted.The tensile strength and compressive strength are at a high level when the theoretical grafting amount is less than 10％,and there is no significant decrease,and the impact strength and elongation at break are greatly improved,which indicates that flexible polyether has a good toughening effect on epoxy resin,and can improve the comprehensive toughness of epoxy resin waterproof sealing material.
epoxy resinin situ graftingpolyether modificationimpact strengthsealed and waterproof
万方数据
维普
