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Hydrocarbon polymeric binder for advanced solid propellantA series of DEAB initiated isoprene polymerizations were run in the 5-gallon stirred autoclave reactor. Polymerization run parameters such as initiator concentration and feed rate were correlated with the molecular weight to provide a basis for molecular weight control in future runs. Synthetic methods were developed for the preparation of n-1,3-alkadienes. By these methods, 1,3-nonadiene was polymerized using DEAB initiator to give an ester-telechelic polynonadiene. This was subsequently hydrogenated with copper chromite catalyst to give a hydroxyl terminated saturated liquid hydrocarbon prepolymer having greatly improved viscosity characteristics and a Tg 18 degrees lower than that of the hydrogenated polyisoprenes. The hydroxyl-telechelic saturated polymers prepared by the hydrogenolysis of ester-telechelic polyisoprene were reached with diisocyanates under conditions favoring linear chain extension gel permeation chromatography was used to monitor this condensation polymerization. Fractions having molecular weights above one million were produced.
Document ID
19730021068
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Potts, J. E.
(Union Carbide Corp. Bound Brook, NJ, United States)
Date Acquired
September 2, 2013
Publication Date
August 31, 1972
Subject Category
Propellants
Report/Patent Number
NASA-CR-133615
Report Number: NASA-CR-133615
Accession Number
73N29800
Funding Number(s)
CONTRACT_GRANT: NAS7-100
CONTRACT_GRANT: JPL-951210
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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