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

M. H. Wilson

关键词: NUCLEAR MAGNETIC RESONANCE;    POLYMERS;    SILICONES;    PERFORMANCE;    SERVICE LIFE;   

DOI  :  10.2172/972918
RP-ID  :  KCP-613-8630s
PID  :  OSTI ID: 972918
Others  :  TRN: US201006%%402

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 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.