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POSS Nanofiller-Induced Enhancement of the Thermomechanical Properties in a Fluoroelastomer Terpolymer

By Daphné Berthier, Marie-Pierre deffarges, Nicolas Berton, Mathieu Venin, Florian Lacroix, Bruno Schmaltz, Yohan Tendron, Eric Pestel, François Tran-Van and Stéphane Méo

Abstract

International audienceThe present study reports on the use of three types of polyhedral oligomeric silsesquioxanes (POSS) nanoparticles with various organic substituents as fillers in a fluoroelastomer (FKM). A series of/POSS elastomer composite thin films is prepared. Microstructural SEM/TEM (scanning electron microscopy/transmission electron microscopy) imaging reveals a dispersion state allowing the presence of micron-sized domains. The influence of POSS content is studied in order to optimize thermal stability and mechanical properties of the composite thin films. Both POSS-A (with an acryloyl functional group and seven isobutyl substituents) and POSS-P (with eight phenyl substituents) lead to higher thermal stability and modulus of the composites, with respect to the unfilled FKM terpolymer matrix. covalent grafting of POSS-A onto the FKM network is found to play a critical role. Enhanced storage modulus in the rubbery plateau region (+210% at 200 • C for 20 phr) suggests that POSS-A is particularly suitable for high temperature applications

Topics: thermomechanical properties, terpolymer, POSS, nanofillers, FKM, rubber, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]
Publisher: 'MDPI AG'
Year: 2018
DOI identifier: 10.3390/ma11081358
OAI identifier: oai:HAL:hal-01855160v1
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