甲基丙烯酸酯类共聚物的超声衰减与声速  

ULTRASONIC ATTENUATION AND VELOCITY ON POLYMERS

作　　者：徐文英[1] 周静[2] 胡建恺[2] 

机构地区：[1]中国科学技术大学材料与科学系,230024 [2]中国科学技术大学

出　　处：《材料科学进展》1989年第3期280-284,共5页

基　　金：国家自然科学基金;285331

摘　　要：用脉冲回波法测定了甲基丙烯酸酯类共聚物的超声衰减与声速。在2.5和5MHz 两种频率下,考察了共聚物超声衰减的温度关系。所得结果与 DSC 法作了比较,共聚物的玻璃化转变温度 T_g 相近。Effect of structure and composition on ultrasonic attenuationand velocity of polymer has been studied by pulse-echo method.Temperaturedependence of ultrasonic attenuation on different polymer materials was mea-sured,the range of measuring temperature was 20—120℃.2.5 and 5MHz wereused as measuring frequency.The results given by this method have been com-pared with that of DSC method.The glass transition temperature of polymersmeasured by the above two method was in agreement with each other.

关 键 词：甲基丙烯酸酯 超声 衰减 声速 

分 类 号：O632.52[理学—高分子化学]