环氧树脂和玻璃粘合的研究

Study on Adhesion of Epoxy Resin to Glass

以断裂力学方法研究了环氧树脂与玻璃的粘合及添加偶联剂的影响.测定了该粘合在80℃水中不同浸泡时间、不同偶联剂、不同偶联剂浓度和不同pH值的断裂能.利用Andrews普适断裂力学理论求得了破坏单位截面积界面上原子键合的界面能θ_(o)及水对θ_(o)的影响符合一级反应规律.比较了θ_(o)值与界面范得华相互作用能.推算出环氧树脂-玻璃粘合中至少有部分是主价键合.

Adhesion of an epoxy resin to glass has been investigated by fracture mechanics test.Specimens were tested after various times of immersion in water at 80℃,and the adhesive failure energy θ determined as a function of crack velocity.The effects of adding silane coupling agents to the epoxy resin,and the influence pH of water were studied.Using the generalized fracture mechanics theory,an intrinsic adhesive failure energy θ_(0) which is defined as the energy required to break interatomic bonds across unit area of the interface were separated from θ.The θ_(0) value of dry sample,7.25Jm^(-2),is approximately 24 times the expected Van der waals interaction energy and this suggests that at least some of the bonds between epoxy resin and glass are primary.