摘要
采用亚磷酸二乙酯化学改性的方法制备了含磷萘基环氧,考察了反应温度的影响.结果表明,较适宜的反应温度为140℃.用NMR表征了改性产物的化学结构,并研究了含磷环氧与二氨基二苯砜(DDS)组成的固化体系的热学和动态力学性能.结果表明,固化体系的玻璃化转变温度为150.5～159.2℃,储能模量E′＞1.5 GPa,成炭率＞27.6%,降解历程可分成2个阶段,磷的质量分数为2.02%时,即可赋予固化物UL-94 V-0阻燃等级.
A novel phosphorus-containing naphthyl epoxy diethyl phosphite and DGEBN. The reaction was monitored was prepared from the modification reaction of with FI＇IR. The results show that the desirable reaction temperature is at 140℃. The proposed structure was confirmed by means of NMR spectra. The modified epoxies were cured with 4,4′-diaminodiphenylsulfone（ DDS）, and the thermal and mechanical properties of the thermosets were studied via TGA （TGA/FTIR） and DMTA. The glass transition temperature values are in the range of 150.5 - 159. 2 ℃, and the storage modulus E′is above 1.5 GPa and the char yield higher than 27.6%. The organophosphorus modified epoxy thermosets have been found to degrade in two consecutive steps and are endowed with UL-94 vertical test of V-0 grade when the content of phosphorus is more than 2. 02%.
出处
《应用化学》
CAS
CSCD
北大核心
2005年第11期1220-1223,共4页
Chinese Journal of Applied Chemistry
关键词
环氧
磷
改性
热性质
阻燃
epoxy
phosphorus
modification
thermal properties
flame retardancy
