POLYMERIC COMPOSITIONS

Cross-linked polymers are disclosed which comprise a linear low density ethylene homo - or copolymer which, prior to cross-linking is characterised by a density at 25.degree.C of 0.940 gm/cm3 or less and a linearity expressed in terms of pendant methyl groups per 103 carbon atoms of the polymer chai...

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Bibliographische Detailangaben
Hauptverfasser:	HEAVEN, MALCOLM D, CLARKE, RAYMOND, TAMPLIN, PAUL
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BASIC ELECTRIC ELEMENTS CABLES CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CONDUCTORS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINEDOPTICAL AND ELECTRIC CABLES OR LINES INSULATORS METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES SEPARATION SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Cross-linked polymers are disclosed which comprise a linear low density ethylene homo - or copolymer which, prior to cross-linking is characterised by a density at 25.degree.C of 0.940 gm/cm3 or less and a linearity expressed in terms of pendant methyl groups per 103 carbon atoms of the polymer chain of less than 30 with a substantial absence of long chain branches. These polymers possess higher .DELTA.T values than conventional branched, low density polyethylenes and are characterised by high elongation versus modulus performance.