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Ultra-High-Molecular-Weight Silphenylene/Siloxane PolymersElastomers having molecular weights above 1 million made by twostage polymerization. Two-stage process proves far more successful than synthesis from reactive monomers. Process involves synthesis of silanolterminated prepolymer and subsequent extension of prepolymer chain with additional aminosilane monomer. Multistage method allows chain-extending monomer added in precise amounts between stages.
Document ID
19850000499
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Patterson, W. J.
Hundley, N. H.
Ludwick, L. M.
Date Acquired
August 12, 2013
Publication Date
March 1, 1986
Publication Information
Publication: NASA Tech Briefs
Volume: 9
Issue: 4
ISSN: 0145-319X
Subject Category
Materials
Report/Patent Number
MFS-27065
Accession Number
85B10499
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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