Synthesis and electro-optic properties of fluorine-containing polyimide  

含氟聚酰亚胺的合成及电光性能(英文)

作　　者：邱凤仙[1] 周钰明[2] 杨艳芳[3] 刘举正[2] 曹庄琪[3] 

机构地区：[1]江苏大学化学化工学院,镇江212013 [2]东南大学化学化工学院,南京210096 [3]上海交通大学物理系导波光电子器件实验室,上海200240

出　　处：《Journal of Southeast University(English Edition)》2007年第1期131-134,共4页东南大学学报（英文版）

基　　金：Jiangsu Planned Projects for Postdoctoral ResearchFunds(No0602037B);the Natural Science Foundation of Higher Edu-cation Institutions of Jiangsu Province (No05KJB150016);the Nation-al Natural Science Foundation of China (No50377005);the Fund ofJiangsu University (No06JDG015)

摘　　要：The fluorine-containing organic polymer was synthesized from 3, 3＇, 4, 4＇-Bisphenyltetracarboxylic （BPDA）, and 2,2-Bis （3-amino-4-hydroxyyphenyl） hexafluoropropane （6FHP）. It is a first-step preparation of a preimided hydroxy-containing polyimide, followed by the covalent bonding of an active chromophore, dispersed red 19 （DR19）, onto the backbone of the polyimide via the Mitsunobu reaction. The nonlinear optical （NLO） containing polyimide was synthesized. The differential scanning calorimeter （DSC）and thermal gravimetric analysis （TGA） exhibited Tg and the temperature Tg at which 5 % mass losses occurring of polymer were 248 and 309 ℃, respectively. A reflective electro-optic （EO） modulator using this polymer was fabricated. The optical nonlinearities were determined to be d33 = 5. 209×10^-9 esu （poling voltage of 3.6 kV, 205 ℃） and d33 =7. 418×10^-9esu （poling voltage of 3. 8 kV, 210 ℃） by the second harmonic generation method in in-situ condition at a fundamental wavelength of 1 064 nm. The EO coefficients 733 of the polymer layer in the EO modulator were determined to be 2. 182 pm/V （poling voltage of 3.6 kV, 205 ℃） and 3. 107 pm/V （poling voltage of 3.8 kV, 210 ℃） at 1064 nm by an attenuated-total-reflection （ATR） method.以含氟的二胺5,5’-(六氟异丙基)-二-(2-氨基苯酚)及二酐3,3’,4,4’-苯四甲酸二酐(BP-DA)为单体,首先合成了经酰胺化的主链上带有活性羟基的含氟聚酰亚胺,再通过Mitsunobu反应将活性生色分子分散红-19共价链接到聚酰亚胺的侧链骨架上,合成了非线性光学(NLO)含氟聚酰亚胺.示差扫描量热分析(DSC)测得其玻璃化转变温度为248℃,热重分析(TGA)测得其5%失重的热分解温度为309℃,将制得的含氟聚酰亚胺制成反射电光调制器,由二次谐波条件于1 064nm处测得不同温度下的非线性系数d33为5.209×10-9esu (极化电压3.6kV,205℃)和7.418×10-9esu (极化电压3.8kV,210℃),用衰减全反射法测得其电光系数γ33为2.182pm/V (3.6kV,205℃)和3.107pm/V (3.8kV,210℃).

关 键 词：nonlinear optical electro-optic property POLYIMIDE 

分 类 号：O631[理学—高分子化学] TH744[理学—化学]