苯氧基取代度对聚膦腈材料性能的影响

Study on relationship among phenoxy substituted degree,mechanical properties and the flame resistant properties

对苯氧基取代程度对材料力学性能和热力学性质的影响进行研究。研究结果表明,P-O-P交联体系可以使材料获得良好的力学性能和耐烧蚀性能。实验表明,当取代度为85%左右时,材料具备良好的拉伸断裂强度和断裂伸长率,以及良好的耐烧蚀性能(36.7%残碳比例)。该研究还克服了传统上未完全取代聚磷腈材料无法使用这一技术偏见。研究表明,取代度较高的苯氧聚磷腈溶液是稳定性的,并且可以浇注成需要的形状。使该类材料获得了使用价值,而且其在使用过程中可以与环境中的水反应交联使材料获得日渐优异的力学和阻燃性能。

In this paper, phenoxy substituted polyphosphazenes were studied to find the relationship among phenox- y substituted degree, mechanical properties as well as the heat resistant properties. The results show that, P-O-P cross- linking system gives the material good mechanical properties and flame resistance properties. In this study, 85~ was the preferred phenoxy substitution degree and at this substitution degree the materials showed good tensile breaking strength, good elongation at break, and good flammability. The study also showed that a higher degree of phenoxy substituted polyphosphazenes solution is stable and can be cast into the required shape. And the material can obtain increasingly me- chanical and flame retardant properties by reacted with water in the environment.