用加脉冲梯度场的NMR自旋回波法测量高分子聚合过程中的自扩散系数  

Self-Diffusion Coefficients of Polymer in Polymerization Measured with Pulsed Field-Gradient NMR Spin Echo Methods

作　　者：胡洊 徐玉书[2] 许静[2] 姜殿武[2] 崔海峰[2] 

机构地区：[1]沈阳化工学院 [2]吉林大学原子与分子物理所

出　　处：《高等学校化学学报》1989年第5期520-521,共2页Chemical Journal of Chinese Universities

摘　　要：通过扩散系数的测量,可以了解高分子聚合反应整个过程的机理,进而控制聚合反应的进程。但能够测量高分子聚合过程中自扩散系数变化的仪器并不多。当前,加脉冲梯度场的自旋回波法被认为是最为有效和实用的方法,此项研究围内尚未报道。A experiment set for measuring self-diffusion coefficients of polymer in polymerization with a pulsed Field-Gredient NMR Spin Echo method is described. The self-diffusio coefficients produced from little molecules in polymerization from MMA to PMMA initiated by AIBN were measured with this set. The lowest value of the coefficients is D= 9.04 × 10-9 cm2 .s-1.

关 键 词：PMMA 核磁共振 自扩散系数 

分 类 号：O632.52[理学—高分子化学]