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Development of improved asbestos reinforced phenolic insulating composites (optimization of physical properties as a function of molding technique and post cure conditions)Detailed data are presented on phenolic-glass and phenolic-asbestos compounds which compare the effect of compression molding without degas to the effects of four variations of compression molding. These variations were designed to improve elimination of entrapped volatiles and the volatile products of the condensate reaction associated with the cure of phenolic resins. The utilization of conventional methods of degas plus degas by vacuum and directional heat flow methods are involved. Detailed data are also presented on these same compounds, comparing the effect of changes in post-bake time, and post-bake temperature for the five molding techniques.
Document ID
19750002977
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Hedges, L. M.
(Johns-Manville Research and Development Center Denver, CO, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1973
Subject Category
Composite Materials
Report/Patent Number
NASA-CR-132416
Accession Number
75N11049
Funding Number(s)
CONTRACT_GRANT: NAS1-11490
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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