Evaluation Of Automated Low-Field Nuclear Magnetic Resonance (NMR) Relaxometry For Analysis Of Silicone Polymers

Wilson, M. H.

Kansas City Plant (U.S.)

关键词: Polymers;    36 Materials Science;    Nuclear Magnetic Resonance;    Service Life;    Silicones;   

DOI  :  10.2172/972918
RP-ID  :  KCP-613-8630s
RP-ID  :  DE-AC04-01AL66850
RP-ID  :  972918

美国|英语

来源: UNT Digital Library

【 摘 要 】

Screening studies and Design of Experiments (DoE) were performed to evaluate measurement variation of a new, non-destructive Nuclear Magnetic Resonance (NMR) test system designed to assess age-induced degradation of Outer Pressure Pads (OPP). The test method and results from 54,275 measurements are described. A reduction in measurement error was obtained after metal support struts were replaced with plastic support struts adjacent to the front position of the test chamber. However, remaining interference and a lack of detecting any age-related degradation prevent the use of the NMR system as a non-destructive surveillance test for OPPs. A cursory evaluation of the system with cellular silicone samples obtained more uniform results with increased error as measurements approached the sample’s edge.