含末端炔Benzoxazine：合成、硬化及熱性質的探討

Abstract

In order to develop a strong toughness also have high thermal stability materials with high toughness benzoxazine groups connected to the acetylene functional groups with high thermal stability. We successfully have used two methods to get the acetylene-cantaining benzoxazine. In one way we use solvent less method, but only get the yield 27 ％, and the other way not only improve the yield to 60 ％, but also identify inter-medium very clearly by NMR, IR, and EA. Then we have some research on acetylene-cantaining polybenzoxazine curing condition. In order to find what the situation we can get the best cross-linking density. And used the TGA, we can get the temperature of weight loss 5 ％ and 10 ％, moreover char yield at 800 ℃. Trough different thermal curing conditions, we have found curing in solvent can raise char yield to 68 ％, and temperature of weight loss 10 ％ was 530℃, it was the best conditions. In order to test Mechanical properties, we use the tensile machine, to the measured stress-strain curve. We found that toughness property is better than curing polymer such as PAA, and the strength of the material was 691 MPa. In this study we find that our products have excellent thermal property and mechanical properties, indicating that it might replace phenolic resins.