【摘 要】
：
A new fluorinated poly(ether amide)bearing xanthene group was prepared from 9,9-bis[4-(2-trifluoromethyl-4-aminophenox-y)phenyl]xanthene(BTFAPX)with 9,9-bis[4-(
【机 构】
：
College of Chemistry and Chemical Engineering
【基金项目】
：
the Research Program of Jiangxi Province Department of Education;国家自然科学基金
论文部分内容阅读
A new fluorinated poly(ether amide)bearing xanthene group was prepared from 9,9-bis[4-(2-trifluoromethyl-4-aminophenox-y)phenyl]xanthene(BTFAPX)with 9,9-bis[4-(4-carboxyphenoxy)phenyllxanthene(BCAPX)in the presence of triphenyl phos-phate and pyridine(Py).The polymer had the weight-average molecular weight(Mw)of 69,000 and number-average molecular weight(Mn)of 39,000,showed the glass transition temperature(Tg)of 267 ℃,5 % weight loss temperature(Td5)over 460 ℃ both in N2 and air,and char yield of 62% at 800 ℃ in N2.This polymer was amorphous and readily soluble in amide-type solvents such as N,N-dimethylacetamide(DMAc),and even in m-cressol,Py and tetrahydrofuran(THF)at room temperature,and exhibited tensile strength of 74 MPa,elongation at break of 6%,tensile moduli of 2.2 GPa.The polymer had low dielectric constant of 3.69(100 Hz),low moisture absorption of 0.56%,and high transparency with an ultraviolet-visible absorption cut-off wavelength at 334 nm.
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