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采用溶液开环聚合法合成了聚二氯膦腈,随后采用三氟乙氧基和八氟戊氧基混合亲核取代,并引入少量可交联基团,制得了三氟乙氧基、八氟戊氧基、乙氧基/含不饱和双键氧基混合取代聚膦腈弹性体,该弹性体可用过氧化物进行交联。利用红外光谱、核磁(31P-NMR和1 H-NMR)对其结构进行了表征,并对其热稳定性和阻燃性能进行了分析,交联后的弹性体热稳定性提高,两种聚合物的氧指数分别达到37.0和39.5,垂直燃烧均可达到UL-94的V-0级别,具有良好的阻燃性能。动态热机械分析和静态接触角测试显示两者在交联前后均具有较好的低温弹性和疏水性。
Polydichlorophosphazene was synthesized by the ring-opening polymerization of the solution, followed by a mixture of trifluoroethoxy and octafluoropentyloxy nucleophilic substitution, and a small amount of cross-linkable groups were introduced to prepare trifluoroethoxy, Fluoropentyloxy, ethoxy / unsaturated double bond containing polyphosphazene elastomers, which elastomers can be crosslinked with peroxides. Its structure was characterized by FTIR, NMR and 1 H-NMR. The thermal stability and flame retardancy were also analyzed. The thermal stability of the elastomer after crosslinking was improved. Two kinds of polymerization Oxygen index of the objects reached 37.0 and 39.5 respectively, and the V-0 grades of UL-94 can be achieved by vertical combustion, which has good flame retardancy. Dynamic thermomechanical analysis and static contact angle test showed that both of them had better low temperature elasticity and hydrophobicity before and after crosslinking.