乙氧基-苯氧基取代聚磷腈弹性体的合成及其热性能研究  

Synthesis of poly(ethoxy-phenoxyphosphazene) and its thermal performance

作　　者：张文豪[1] 吴战鹏[1] 刘伟[1] 武德珍[1] 

机构地区：[1]北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室,北京100029

出　　处：《北京化工大学学报（自然科学版）》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)

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 ℃.

关 键 词：聚磷腈 弹性体 热性能 

分 类 号：TQ226.61[化学工程—有机化工]