摘要
以氨基磺酸为催化剂,五氯化磷和氯化铵为原料,"一步法"直接合成了聚二氯磷腈中间体。随后以乙醇钠、苯酚钠为亲核试剂进行取代反应,分别合成了乙氧基全取代聚磷腈、苯氧基全取代聚磷腈和乙氧基苯氧基混合取代聚磷腈。采用核磁磷谱和红外光谱表征了聚磷腈产物的结构,并通过热重分析仪和差示扫描量热法评价了产物的热性能,结果表明目标产物为乙氧基苯氧基混合取代聚磷腈,数均分子量可达105,玻璃化转变温度为-11℃,初始热分解分度为281℃。
Polydichlorophosphazene （PDCP） has been directly synthesized from PCls and NH4CI by a one-pot reac- tion catalyzed by sulfamic acid. Poly（diethoxyphosphazene） , poly（diphenoxyphosphazene） and the mixed-substit- uent poly（ethoxy-phenoxyphosphazene） were prepared by substitution reactions of PDCP with sodium ethoxide and/ or sodium phenoxide as nucleophilic reagents. Their structures were characterized by 31p nuclear magnetic reso- nance spectroscopy and infrared spectroscopy. Their thermal properties were investigated by thermogravimetric anal- ysis and differential scanning calorimetry. The results indicated that the optimum product was a mixed-substituent polyphosphazene with number-average molecular weight of 105 , which had a glass transition temperature of - 11℃ and initial decomposition temperature of 281 ℃.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第2期49-53,共5页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金(51273018)
关键词
聚磷腈
弹性体
热性能
polyphosphazene
elastomers
thermal performance
