β相聚偏二氟乙烯PVDF薄膜的制备和热光效应研究  

Preparation and thermo-optic effect of oriented β PVDF thin films

作　　者：惠迎雪[1,2] 刘卫国[3] 牛小玲[3] 杭凌侠[3] 樊慧庆[1] 

机构地区：[1]西北工业大学材料学院 [2]西安工业大学 西安 710072 [3]西安工业大学

出　　处：《红外与激光工程》2006年第z5期143-149,共7页Infrared and Laser Engineering

基　　金：陕西省教育厅项目(05JK220);陕西省薄膜技术与光学检测重点实验室项目(ZSKJ200408)

摘　　要：采用溶液旋覆法制备β相 PVDF 铁电聚合物薄膜,利用 X 射线衍射仪、傅里叶红外光谱仪对薄膜晶形结构进行分析,并使用椭偏仪测定了溶液法制备的β相 PVDF 薄膜热光系数,同时对其热-光信号读出机制进行研究。结果表明,在60～120℃下结晶有利于β晶相的形成,而较高温度下主要形成γ晶相;薄膜的热光效应不仅与其热膨胀紧密相关,还受到温度变化趋势的影响,在20～100℃范围内,β相 PVDF 聚合物薄膜有较高的(负)热光系数约2.4～3.3×10^(-4)/K,升温条件下测得的热光系数更高;在探测波长633 nm 条件下,薄膜反射率变化可以线性地表征出薄膜温度的变化,基于薄膜热光效应的热-光信号读出机制是可行的。Using the solution to turn on lathe duplicate method to prepare beta the PVDF ferroelectricity polymer thin film,used X beam diffractometer,Fourier infrared spectroscope (FTIR) has carded on the analysis to the thin film crystalling structure,and used the ellipse leaning instrumental measurement to decide the solution law preparation beta the PVDF thin film calorescence coefficient,simultaneously has launched the research to its heat- light signal read-out mechanism.The result indicated,under the crystal is advantageous to beta the crystalling phase formation,but under the high temperature mainly forms gamma the crystalling phase;Not only if thin film calorescence effect heat expansion close correlation,but also receives the temperature change tendency the influence, in the scope 20 to 100 ℃,β PVDF polymer thin film has high (negative) the calorescence coefficient is about 2.4～3.3×10^(-4)/K.Under the elevation of temperature condition obtains the calorescence coefficient is higher;Under the survey wave length 633nm condition,the thin film index of reflection change may linearly attribute the film temperature the change,based on the thin film calorescence effect heat-light signal read-out mechanism is feasible.

关 键 词：聚合物 PVDF Β相 热光效应 

分 类 号：O631[理学—高分子化学]