【摘要】 利用饱和转移电子自旋共振、ST-ESR)方法研究自旋标记苯乙烯一丁二烯一苯乙烯嵌段共聚物（SBS）的慢速翻滚运动,在-70～-20℃的温度范围内,观察到旋转相关时间τ_o从10^-6到10^-5S的运动,并求得相应的活化能。又用电子自旋共振（ESR）方法测定了T_R参数,同时讨论了嵌段共聚物链段运动的特征。更多还原

【Abstract】 The slow tumbling motion of a spin labelled SBS block copolymer was investi-gated by the saturation transfer ESR （ST-ESR）. Motions pertaining to the rota-tional correlation time from 10^-6 to 10^-5S were observed in the temperature rangefrom -70℃ to -20℃, and thereby the parameter T_R ascertained by ESR. A briefdiscussion was made on the nature of the segmental motion of this block copolymer.更多还原