Archivio Istituzionale della RicercaThis workfocusesonthechemicalmodification ofmontmorillonite(MMT)(Cloisites Na) withcompa- tible silanes,vinyltriethoxysilane(CVTES)and γ-methacryloxypropyltrimethoxysilane(CMPS)inorderto preventagglomerationandtoimprovemontmorilloniteinteractionwithanunsaturatedpolyesterresin matrix seekingtoachieveamultifunctionalcomposite.Claysweredispersedintheresinbymechanical stirring andsonicationandthenanocompositeswerepreparedbyresintransferintoamold.Theme- chanical, morphological,thermaland flammability propertiesoftheobtainedcompositeswerecom- pared withthosepreparedusingcommercialCloisites 30B (C30B)andCloisites 15A(C15A)clays.Ad- vantagesofusingsilane-modified clays(CVTESandCMPS)ascomparedwithorganic-modified clays (C30B andC15A)canbesummarizedassimilar flexuralstrengthandlinearburningratebuthigher storagemodulusandimprovedadhesiontothepolyesterresinwithconsequenthigherthermalde- flection temperatureandreinforcementeffectivenessathighertemperatures.However,organicmodified claysshowedbetterdispersion(tendencytoexfoliate)andconsequentlydelayedthermalvolatilization due totheclaybarriereffect.
Effect of clay silylation on curing and mechanical and thermal properties of unsaturated polyester/montmorillonite nanocomposites / Romanzini, Daiane; Frache, Alberto; Zattera, Ademir J.; Amico, Sandro C.. - In: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS. - ISSN 0022-3697. - STAMPA. - 87:(2015), pp. 9-15. [10.1016/j.jpcs.2015.07.019]
Effect of clay silylation on curing and mechanical and thermal properties of unsaturated polyester/montmorillonite nanocomposites
FRACHE, ALBERTO;
2015
Abstract
This workfocusesonthechemicalmodification ofmontmorillonite(MMT)(Cloisites Na) withcompa- tible silanes,vinyltriethoxysilane(CVTES)and γ-methacryloxypropyltrimethoxysilane(CMPS)inorderto preventagglomerationandtoimprovemontmorilloniteinteractionwithanunsaturatedpolyesterresin matrix seekingtoachieveamultifunctionalcomposite.Claysweredispersedintheresinbymechanical stirring andsonicationandthenanocompositeswerepreparedbyresintransferintoamold.Theme- chanical, morphological,thermaland flammability propertiesoftheobtainedcompositeswerecom- pared withthosepreparedusingcommercialCloisites 30B (C30B)andCloisites 15A(C15A)clays.Ad- vantagesofusingsilane-modified clays(CVTESandCMPS)ascomparedwithorganic-modified clays (C30B andC15A)canbesummarizedassimilar flexuralstrengthandlinearburningratebuthigher storagemodulusandimprovedadhesiontothepolyesterresinwithconsequenthigherthermalde- flection temperatureandreinforcementeffectivenessathighertemperatures.However,organicmodified claysshowedbetterdispersion(tendencytoexfoliate)andconsequentlydelayedthermalvolatilization due totheclaybarriereffect.
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https://hdl.handle.net/11583/2631816
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