Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 48, Issue 7, Pages 778-789Publisher
WILEY-BLACKWELL
DOI: 10.1002/polb.21943
Keywords
crosslinking; elastomers; mechanical properties; networks; thermal properties
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A new approach to prepare and characterize double network elastomeric systems was investigated. A styrene-ethylene-co-butylene-styrene (SEBS) triblock copolymer system containing physical crosslinks was used to achieve a double network by additional crosslinking using ultra-violet (UV) light. An ethylene-propylene-diene monomer (EPDM) terpolymer system containing chemical crosslinks was used to achieve a conventional double network using UV crosslinking. Properties from conventional monotonic tensile tests, dynamic mechanical analysis, and thermomechanical properties were investigated. These double network elastomers show a transition between competitive and collaborative behavior in their mechanical properties and lower coefficients of thermal expansion arising from a competition of the networks. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part 8: Polym Phys 48: 778-789, 2010
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