Accession Number : AD0477806


Title :   INITIAL EVALUATION OF DIPHENYL OXIDE RESINS.


Descriptive Note : Technical rept.,


Corporate Author : ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)


Personal Author(s) : Phillips, L N ; Nixon, B ; Woolmington, Jennifer A


Report Date : Oct 1965


Pagination or Media Count : 38


Abstract : Diphenyl oxide was shown to condense readily with p-xylylene dichloride under mild conditions to give soluble, fusible thermosetting resins. These have been used to make laminates with a variety of reinforcing fibres, of which chrysotile asbestos and aluminum silicate were the most satisfactory. Long term heat-ageing tests on chrysotile asbestos laminates showed a thermal stability similar to that of analogous Friedel-Crafts resins based on terphenyl, but with better initial hot-strength than the latter. The hydrolytic stability of diphenyl oxide based materials was good, but the resistance to concentrated acid and alkali was relatively poor. A new series of Friedel-Crafts polymers (Mark 2) was discovered based on the aromatic methoxymethyl derivative. These cure more slowly than resins made from the corresponding dichloromethyl compound. The Mark 2 resins appear to have application in the field of insulation both as impregnating media and as thermosetting moulding compounds. (Author)


Descriptors :   *THERMOSETTING PLASTICS , *BIPHENYL , OXIDES , SYNTHESIS , LAMINATES , ALUMINUM COMPOUNDS , SILICATES , POLYMERS , AMINES , THERMAL STABILITY , REINFORCING MATERIALS , MECHANICAL PROPERTIES , CHEMICAL PROPERTIES , UNITED KINGDOM , DENSITY , SPECTROPHOTOMETERS , MANUFACTURING , XYLENES , AGING(MATERIALS)


Subject Categories : Polymer Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE