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Polymers and Polymer Composites

METALLIC METHACRYLATE AS A REACTIVE FILLER TO REINFORCE ETHYLENE-PROPYLENE-DIENE RUBBER

April 1, 2001 By: Peng Z; Zhang Y; Liang X; Zhang Y Research article

Title: METALLIC METHACRYLATE AS A REACTIVE FILLER TO REINFORCE ETHYLENE-PROPYLENE-DIENE RUBBER
Page Range: p.275-282
Author(s): Peng Z; Zhang Y; Liang X; Zhang Y
File size: 471K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 9
Issue No: No. 4

Abstract
Non-polar EPDM was reinforced by the addition of polar metal salts of methacrylic acid at a high level, followed by peroxide curing. Mechanical properties and crosslink density of the vulcanisates were investigated. Wide-angle X-ray diffraction and FTIR were used to analyse the reactivity of zinc dimethacrylate (ZDMA) in EPDM compounds pre- and post-vulcanisation. It was found that ZDMA or magnesium dimethacrylate can greatly improve the hardness and tensile strength of the vulcanisates whilst retaining a high elongation at break, and that it acts as a reactive filler in the EPDM matrix during peroxide curing. Crosslink density was determined by equilibrium swelling. Covalent crosslinks and ionic crosslinks were distinguished by acidolysis treatment. Ionic crosslinks were improved by increasing the amount of ZDMA, and the relationship between mechanical properties and crosslink density are claimed to indicate that the tensile strength of the vulcanisate is principally dependent on ionic crosslink density. 19 refs.

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