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Attempt toward 1D Cross‐Linked Thermoplastic Elastomers: Structure and Mechanical Properties of a New System

Abstract : D cross-linked” thermoplastic elastomers could be an interesting class of materials, where the elastomer would be physically cross-linked by the self-association of functional groups forming long supramolecular chains. These materials could present both a high strength (due to the very large functionality of the cross-linking domains) and reversibility at room temperature (due to the intrinsic reversibility of the supramolecular chains). To obtain such materials, poly(dimethylsiloxane)s (PDMS) grafted with hydrogen bonding bis-ureas have been synthesized by modification of amino-functional PDMS. The materials obtained are physically cross-linked at room temperature by aggregation of strongly but reversibly self-associated bis-ureas. PDMS combining high bis-urea content and long polymer chains can undergo high strains and stresses at room temperature, but they can be processed at higher temperature. A wide control of the mechanical properties of the materials has been achieved by adjusting the structure of the polymer (molecular weight, grafting density, nature of the bis-urea). Although 3D cross-linking has been obtained instead of the aimed 1D cross-linking, new thermoplastic elastomers with easily tunable processing temperature and mechanical properties are presented.
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Submitted on : Saturday, August 29, 2020 - 12:17:26 PM
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Olivier Colombani, Chantal Barioz, Laurent Bouteiller, Corinne Chanéac, Lionel Fompérie, et al.. Attempt toward 1D Cross‐Linked Thermoplastic Elastomers: Structure and Mechanical Properties of a New System. Macromolecules, American Chemical Society, 2005, 38 (5), pp.1752--1759. ⟨10.1021/ma048006m⟩. ⟨hal-01696738⟩



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