苯乙烯-异戊二烯嵌段共聚物分子运动的脉冲核磁共振研究

用西德Bruke,MSL-300核磁共振谱仪研究了三个不同系列的苯乙烯-异戊二烯嵌段共聚物的固体回波谱。用PASCAL语言在谱仪提供的计算机上、用线性最小二乘法回归分析把实验曲线分解成快速和慢速两个组分,它们分别对应于嵌段共聚物中刚性相和流动相,从而给出样品两相结构的定性定量信息。

PULSED NMR STUDY ON THE PHASE STRUCTURE AND MOLECULAR MOTION OF BLOCK COPOLYMERS OF STYRENE AND ISOPRENE

Pulsed Nuclear Magnetic Resonance measurement is presented for three series of the block polymer of styrene and isoprene. The solid echo measurement was made on a Bruker MSL-300 NMR Spectrometer operating at 300 MHz. The solid echo signals were decomposed by means, of linear least square regression into a fast Gaussian and a slow exponential components associated with the rigid and mobile phase respectively, using PASCAL language and lealed with on the Aspect-3000 computer which is equipped on the spectrometer. The qualitative and quantitative informations of the phase structure and molecular motion can be obtained by means of this method.