【作者】 蒋艳； 邱凤仙； 赵敏坚； 杨冬亚；

【Author】 JIANG Yan, QIU Feng-xian, ZHAO Min-jian, YANG Dong-ya (School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China)

【机构】 江苏大学化学化工学院；

【摘要】 3,4’-二胺基二苯醚(3,4’-ODA),3,3’,4,4’–联苯四甲酸二酐(BPDA)和分散红1(DR1)合成了有机聚合物聚酰亚胺;用傅里叶红外光谱、紫外-可见光谱等分析手段对聚酰亚胺进行了结构表征,采用示差扫描量(DSC)、热失重分析(TGA)进行了热稳定性表征。示差扫描量热和热失重分析结果显示,该聚酰亚胺的玻璃化转变温度(Tg)为288℃,在5%的热失重温度为294℃,表明具有非常好的热稳定性。测定了材料在复合光光照射下的折射率(n)和热光系数(dn/dT);通过热光系数的测量,计算了聚合物的介电常数(ε)、介电热光系数(dε/dT)、体积热膨胀系数β和(dβ/dT)值。该聚合物材料在复合光下的热光系数(dn/dT)值为-2.2714~-2.4086×10-4℃-1,体积热膨胀系数变化率(dβ/dT)为2.19～2.51×10-7K-1,对研制新型数字热光开关材料具有一定的意义。更多还原

【Abstract】 The organic polymer polyimide which using 3,4’-Diaminodiphenyl Ether (3,4’-ODA) , 3,3’, 4,4’- Bisphenyltetracarboxylic (BPDA) and dispersed red 1 (DR1), is synthesized. The chemical structure of polyimide is characterized by FT-IR and UV-Vis spectroscopy. The thermal properties are characterized using the differential scanning calorimeter (DSC) and thermal gravimetric analysis (TGA). The DSC and TGA exhibited high Tg and the temperature at which 5% mass loss occurred of polyimide were 288 and 294 ℃ , respectively. The material has good thermal stability. The measurements of refractive index (n) and thermo-optic coefficient (dn/dT) of polyimide are demonstrated at complex light. The values of n and dn/dT are used to calculated the dielectric constant (ε), its variation with temperature (dε/dT), volume expansion coefficient (β) and (dβ/dT). The dn/dT and dβ/dT are -2.271 4~-2.408 6×10-4 ℃-1 and 2.19~2.51×10-7 ℃-1. The conclusion had a little significance to develop new the digital optical switch (DOS).更多还原