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Solubilization and spore recovery from silicone polymersA non-sporicidal technique for solvent degradation of cured silicone polymers was developed which involves chemical degradation of cured silicone polymers by amine solvents at room temperature. Substantial improvements were obtained in the recovery of seeded spores from room temperature cured polymers as compared to the standard recovery procedures, which indicates that the curing process is not sufficiently exothermic to reduce spore viability. The dissolution reaction of cured silicone polymers whith amine solvents is proposed to occur by bimolecular nucleophilic displacement. The chemical structure of silicone polymers was determined by spectroscopic methods. The phenyl to methyl ratio, R/Si ratio, molecular weight, and hydroxyl content of the silicone resins were determined.
Document ID
19750003519
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Hsiao, Y. C.
(North Dakota State Univ. Fargo, ND, United States)
Date Acquired
September 3, 2013
Publication Date
June 1, 1974
Subject Category
Life Sciences (General)
Report/Patent Number
NASA-CR-140769
Accession Number
75N11591
Funding Number(s)
CONTRACT_GRANT: NGR-35-001-012
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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