Marjanski M, Srinivasarao M, Mirau P A
Department of Chemistry, University of California, Berkeley 94720, USA.
Solid State Nucl Magn Reson. 1998 Sep;12(2-3):113-8. doi: 10.1016/s0926-2040(98)00057-5.
Multipulse solid-state proton Nuclear Magnetic Resonance (NMR) has been used to study the domain structure in poly(styrene-b-isoprene-b-styrene) triblock copolymers in clear and self-assembled polymer films. Films containing ordered arrays of microcavities (3-5 microm) were obtained by casting the polymer from carbon disulfide solution in a moist environment, while clear films were obtained by solvent evaporation under nitrogen. The domain sizes for the polystyrene and polyisoprene blocks were measured by proton spin diffusion using the dipolar filter pulse sequence. The domain sizes for the dispersed phase and the long period were measured to be in the range of 3-6 nm, depending on the polymer molecular weight, and no differences domain size were observed for the clear and the self-assembled polymer films.
多脉冲固态质子核磁共振（NMR）已被用于研究透明和自组装聚合物薄膜中聚（苯乙烯-嵌段-异戊二烯-嵌段-苯乙烯）三嵌段共聚物的畴结构。通过在潮湿环境中从二硫化碳溶液中浇铸聚合物获得含有有序微腔阵列（3-5微米）的薄膜，而在氮气下通过溶剂蒸发获得透明薄膜。使用偶极滤波脉冲序列通过质子自旋扩散测量聚苯乙烯和聚异戊二烯嵌段的畴尺寸。根据聚合物分子量，分散相的畴尺寸和长周期测量值在3-6纳米范围内，并且在透明和自组装聚合物薄膜中未观察到畴尺寸差异。
