摘要
为改进4,6-二氨基间苯二酚磷酸盐的合成工艺,采用多聚磷酸(PPA)法制备磷酸盐,并对其结构进行表征。结果表明:PPA法制磷酸盐的合成工艺,可以使反应时间从几天缩短到几个小时,反应产率从79.46%提高到91.12%。以次亚磷酸为还原剂对磷酸盐单体进行稳定化的研究表明:稳定后的磷酸盐在室温条件下储藏一个月后,基本不发生氧化。将稳定化后的单体和对苯二甲酸(TA)在PPA的介质中进行缩聚反应可以得到具有高聚合度(特性粘数[η]=17 dL/g)的聚亚苯基苯并二噁唑(PBO)。
In order to improve the synthesis of 4,6-diaminoresorcinol diphosphate, we prepared 4,6- diaminoresorcinol diphosphate by polyphosphoric acid and characterized its structure. The preparation of 4,6-diaminoresorcinol diphosphate by PPA method reduce reaction time from two or three days to some hours and enhance the yield from 79.46% to 91. 12%. To enhance the stability of 4,6-diaminoresorcinol diphosphate, HaPO2 was used for the stabilization of 4,6-diaminoresorcinol diphosphate. The study manirests that 4,6-diaminoresorcinol diphosphate is stable for oxidization after being placed one month. PBO spinning solution was prepared from 4,6-diaminoresorcinol diphosphate in polyphosphoric acid by solution poly-condensation. The polymerization degree of obtained PBO is high and the inherent viscosity is 17 dL/g.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第1期42-46,共5页
Journal of East China University of Science and Technology
基金
上海市重点学科建设项目资助
