Engineering Research Equipment: Pulsed Field Gradient NMR Probe

摘要脉冲场梯度核磁共振探针增强的核磁共振能力将允许溶质迁移率以及溶解度在聚合物中的测量。将对不同物理处理方法的聚合物样品的测量结果进行直接比较，以便更好地理解结构功能关系。特定的应用将着眼于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有助于破坏臭氧层和全球变暖，因此必须确定替代气体或工艺。膜基气体分离方法作为一种低能耗、更经济的生产商业和医学上重要气体的方法，具有广阔的应用前景。N T" AUTOEXECBAT X J BURKA PRE dP #zs SAVERS J " ICONS J " LM Y CTS-9313913爱荷华大学David G. Rethwisch摘要脉冲场梯度核磁共振的增强能力~ı!!![font =宋体][font =宋体][font =宋体]pscript苹果激光打印机II NT U D o D， X Z e " h ıC ıC 1尼克尔·科沃德尼克尔·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