偏氰乙烯—醋酸乙烯共聚物的压电特性  

Piezoelectricity of Vinylidene Cyanide-Acetate Copolymer

作　　者：郑安泉 

机构地区：[1]上海科技专科学校

出　　处：《压电与声光》1991年第2期24-28,共5页Piezoelectrics & Acoustooptics

摘　　要：偏氰乙烯与醋酸乙烯的交替共聚物是一种能显示出压电特性的无定形聚合物。共聚物试样在Tg((?)170—180℃)温度和电场(20—60MV/m)作用下,沿电场方向排列的偶极子可通过降低温度而被冻结起来,获得很强的压电性。其压电应力常数e_(33)和机电耦合系数K_(33)分别为70mC/m^2和0.25。 ·The alternating copolymer of vinylidene cyanide and vinyl acetate is an amorphous polymer showing piezoelectric property .When the electric field of 20-60MV/ m is applied to the sample in temperature range Tg= 170-180C for a certain pericd, the dipoles aligned by the electric field can be frozen by lowing the temperature to obtain strong piezoelectric activity. The piezoelectric constant en and electromechanical coupling; coefficient K33 are 70mC/m2 and 0.25 respectively.

关 键 词：偏氰乙烯 醋酸乙烯 聚物 压电效应 

分 类 号：O631.23[理学—高分子化学]