改性双酚A环氧树脂固化机理及其性能

Solidified Mechanism and Performance for Modified Epoxy Resin

用脂环族三官能度环氧树脂TDE-85改性双酚A型环氧树脂，达到提高耐热性与强韧性的目的。利用DSC对其固化反应机理进行了深入研究，并借助DDA确定中温固化工艺，对中温固化树脂基体的力学性能和热性能的研究表明：固化物力学性能优良，与普通双酚A型树脂相比，相同固化体系树脂浇铸体的拉伸强度由47．30MPa提高到70．50MPa，弯曲强度由62．74MPa提高到85．48MPa，冲击韧性由9．08×10^3J／m^2提高到1．09×10^4J／m^2，拉伸强度、断裂延伸率、弯曲强度及冲击韧性分别提高49．05％、50．0％、36．24％及19．53％。IR分析表明，固化物的固化度为92．3％。

One multifunctional epoxy resin （TDE-85） is used to improve conventional A-type epoxy resin to improve its thermal endurance and obdurability. An epoxy matrix with middle temperature curing technique is confirmed in virtue of DDA and DSC. Compared with common A-type epoxy resin, this possesses excellent tensile and impact strength, the tensile strength increases from 47. 30 MPa to 70. 50 MPa, the bending strength increases from 62. 74 MPa to 85.48 MPa, and the impact strength also increases from 9. 08 × 10^3 J/m^2 to 1.09 × 10^4 J/m^2. The tensile strength, fracture length, bending strength and impact strength increase by 49.05% ,50.0% ,36. 24% and 19.53% respectively. The correlation between molecular structure and properties are analyzed by infrared absorption spectroscopy, the solidified degree of condensate is 92. 3%.