Accession Number : ADA184350
Title : Thermoplastic Elastomers as LOVA (Low Vulnerability Ammunition) Binders.
Descriptive Note : Annual rept. Jan-Dec 86,
Corporate Author : MASSACHUSETTS UNIV AMHERST
Personal Author(s) : Chien, James C ; Farris, Richard J ; Lillya, C P ; Winter, H H
PDF Url : ADA184350
Report Date : Jan 1986
Pagination or Media Count : 46
Abstract : From promesogens - Conventional mesogenic compounds have high Tm which limits the conditions for processing. In this work, low melting promesogens were used to synthesize liquid crystalline compounds and polymers. Alkyl-4(4'-alkoxybenzoyloxy)benzoates (with C1-C-10 alkyl and alkoxy groups) are monotropic compounds which melt directly to isotropic liquids. Twin liquid crystalline compounds, TLCC, of alkoxybenzoyloxybenzoic acid have been synthesized. The TLCC with methoxy end groups and trioxyethylene spacer is weakly mesogenic; but replacement of the methoxy with an n-butoxy end group results in a smectic mesophase. From Mesogens Azo and azoxy aromatic systems are currently being investigated to test the feasibility of this project. 4,4-Azoxy benzoic acid has been prepared by a reduction nitrobenzoic acid with sodium hydroxide in methanol. This purified material was then converted to the diacid chloride by treatment with thionly chloride. The azoxy benzoyl chloride was purified by recrystallization in good yields.
Descriptors : *BINDERS, *GUN PROPELLANTS, *ELASTOMERS, *THERMOPLASTIC RESINS, SYNTHESIS(CHEMISTRY), BENZOATES, LIQUID CRYSTALS, BENZOIC ACIDS, POLYMERIZATION, POLYMERS, COMPOSITE MATERIALS, MECHANICAL PROPERTIES, POLYURETHANE RESINS, CYCLIC COMPOUNDS, INFRARED SPECTROSCOPY, MELTING POINT, NUCLEAR RADIATION SPECTROSCOPY, RHEOLOGY
Subject Categories : Ammunition and Explosives
Elastomers and Rubber
Distribution Statement : APPROVED FOR PUBLIC RELEASE