高韧性低黏度1,8-辛二醇基环氧树脂的制备及其性能

Preparation and properties of 1,8-octanediol based epoxy resin with high toughness and low viscosity

以1,8-辛二醇、环氧氯丙烷为原料,苄基三乙基氯化铵为相转移催化剂,NaOH为闭环剂,通过两步法合成1,8-辛二醇基环氧树脂(ODOL-EP),并与普通双酚A型环氧树脂进行性能对比与结构表征。结果表明:ODOL-EP的环氧值高达0.676 mol/100 g,产率达90.95%,其黏度(0.0186 Pa·s)低于普通双酚A型环氧树脂(13.2721 Pa·s),降低了加工难度;当1,8-辛二醇与环氧氯丙烷摩尔比为1.0∶3.6时韧性达到最佳,冲击强度及断裂伸长率分别提高了279.96%,342.82%,拉伸强度有所降低;ODOL-EP固化物呈现良好的韧性断裂特征。

The 1,8-octanediol based epoxy resin(ODOL-EP)was synthesized via a two-step method with 1,8-octydiol and epichlorohydrin as raw materials,benzyl triethylammonium chloride as phase transfer catalysts and sodium hydroxide as closed-loop agent.The properties of ODOL-EP were compared with those of bisphenol A type epoxy resin.Both structures were characterized.The results show that the epoxy value of ODOL-EP is up to 0.676 mol/100 g,whose yield reaches 90.95%,and whose viscosity is 0.0186 Pa·s,lower than that of ordinary bisphenol A type epoxy resin(13.2721 Pa·s),reducing the difficulty of processing.The toughness of the product reaches the best when the molar ratio of 1,8-octanediol to epichlorohydrin is 1.0∶3.6,and whose impact strength and elongation at break are increased by 279.96%and 342.82%,respectively,while whose tensile strength is decreased.The ODOL-EP cured material performs excellently in ductile fracture.