Engineering Research Equipment: Pulsed Field Gradient NMR Probe

CTS-9313913爱荷华州大学大卫G.雷特维施 摘要 脉冲场梯度核磁共振探针的增强的核磁共振能力将允许测量溶质的流动性以及在聚合物中的溶解度。 直接比较不同物理加工方法的聚合物样品的测量结果，以更好地理解结构与功能的关系。 特别的应用旨在改进用于气体分离的无孔聚合物膜。 目前用于生产泡沫的气体会破坏臭氧层并导致全球变暖，因此必须确定替代气体或工艺。 基于膜的气体分离方法作为生产商业和医学上重要的气体的较低能量、更经济的方法提供了希望。 . N T " 自动执行 X J 布尔卡 预 dP #zs SAVERS J " 图标 J " LM y CTS-9313913爱荷华州大学大卫G.雷特维施 摘要 脉冲场梯度增强核磁共振性能 ı ~ ı ! ! ! F u u ı ı ( Times New Roman 符号Arial& Apple LaserWriter II NT LPT3：pscript Apple LaserWriter II NT u d o d , X z e " H ıC ıC 1 尼歇尔·科沃德尼歇尔·科沃德

CTS-9313913 University of Iowa David G. Rethwisch ABSTRACT The enhanced capabilities of NMR with a pulsed field gradient NMR probe will permit the measurement of solute mobility as well as solubility in polymers. Direct comparison of measurements for polymer samples from different physical processing methods will be made for better understanding of structure function relationships. Particular applications will be aimed at the improvement of non-porous polymeric membranes for gas separations. Gases currently used in the production of foams contribute to the destruction of the ozone layer and to global warming so that alternative gases or processes must be identified. Membrane-based gas separation methods offer promise as a lower energy, more economical approach to the production of commercially and medically important gases. .N T" AUTOEXECBAT X J BURKA PRE dP #zs SAVERS j " ICONS j " LM Y CTS-9313913 University of Iowa David G. Rethwisch ABSTRACT The enhanced capabilities of NMR with a pulsed field gradie ı ~ ı ! ! ! F U U ı ı ( Times New Roman Symbol & Arial Apple LaserWriter II NT LPT3: pscript Apple LaserWriter II NT U D o d , X Z e " h ıC ıC 1 Nichelle Coward Nichelle Coward