导电偶氮苯共轭聚合物的合成及性能研究  

Study on Synthesis of Conjugated Azobenzene Polymer and Its Properties

作　　者：董明灵[1,2] 刘剑 王强[2] 田晶晶 李园园 罗小芳 

机构地区：[1]四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,四川绵阳621010 [2]西南科技大学工程技术中心,四川绵阳621010

出　　处：《中国塑料》2012年第5期22-27,共6页China Plastics

基　　金：国家自然科学基金(20774076);西南科技大学大学生创新基金(CX10-017)

摘　　要：采用过硼酸钠氧化4,4′-二氨基联苯合成了主链含偶氮苯的共轭聚合物。通过傅里叶变换红外光谱、拉曼光谱、紫外-可见吸收光谱、差示扫描量热仪、四探针测试仪对偶氮苯共轭聚合物的结构和性能进行了研究。结果表明,得到的偶氮苯共轭聚合物数均相对分子质量(Mn)为4482,其玻璃化转变温度(Tg)为186℃,并在热分析测试中发现共轭聚合物主链顺式构型偶氮苯单元;盐酸掺杂的偶氮苯共轭聚合物电导率为8.7×10-5 S/cm,碘掺杂的偶氮苯共轭聚合物电导率为2.65×10-4 S/cm,钠-萘掺杂的偶氮苯共轭聚合物导电率为1.92×10-4 S/cm,偶氮苯共轭聚合物经365nm(3mW/cm2)紫外光照射后,偶氮苯共轭聚合物的电导率扩大一个数量级,换用473nm(20mW/cm2)可见光光照后,其电导率发生回复,表明偶氮苯共轭聚合物具有光调制导电特性。An azobenzene-bridged main chain conjugated polymer was synthesized via oxidation of an aromatic diamine with sodium perborate. The conjugated azobenzene polymer was characterized using FTIR, UV-Vis, DSC, Raman spectroscopy. The number-average molecular weight of the conjugated polymer was 4428 and the glass transition temperature was 186 ℃. Thermal analysis conformed that the cis configuration azobenzene units were on the main chain. When doped with hydrochloride acid, I2, and sodium naphthalide, the electrical conductivities of the conjugated polymer were 8. 7 ×10^-5 S/cm, 2. 65 ×10^-4/cm, and 1.92 ×10^-4 S/cm, respectively. Upon irradiation with W-light, the conductivity increased, subsequently irradiated with vis-light or heated, the conductivity returned to its original levels, which showed that the azobenzene conjugate polymer possessed light modulation conductive properties.

关 键 词：偶氮苯 导电聚合物 共轭聚合物 光致异构化 

分 类 号：O631.3[理学—高分子化学]