铁电共聚物薄膜微畴的直接观测

Direct Observation of Micro-domains in Ferroelectric Copolymer Films

采用原子力显然镜的力调制技术 ,首次成功获得了偏二氟与三氟乙烯铁电共聚物 (P(VDF/TrFE) )薄膜样品高弹性畴和低弹性畴的图像 ,发现高、低弹性畴难以用表面形貌测定来加以区分 .推测高弹性畴对应于P(VDF/TrFE)的晶畴 .借助Sneddon理论 ,由在高。

For the first time,with the help of the force modulation of atomic force microscope(AFM),images of the high and the low elastic phases in the random copolymer of vinylidene fluoridetrifluoroethylene (P(VDF/TrFE)) were successfully obtained,and it was found difficult to distinguish the high and the low elastic phases only by the measurements of the morphology.It was guessed that the high elastic phases were corresponding to crystalline phases.Based on the measurements of the force-distance curve of the reference sample and P(VDF/TrFE) films,the ratio of Young's elastic modulus of the high elastic phases to the lows was approximatively calculated by Sneddon mechanics.