title: Dynamic and structural correlations in nanocomposites of silica with modified surface and carboxylated nitrile rubber.
abstract: Distinct affinities between the organic and inorganic phases were observed in nanocomposites prepared through a colloidal route with carboxylated nitrile rubber and modified silica nanoparticles, which resulted in variable mechanical properties and improved thermal stability. Nanoparticles with modified surface affected the macromolecular arrangements of the elastomeric matrix, changing the final mechanical behavior of the nanocomposite, which could be predicted by the spin-lattice relaxation time measured by solid-state NMR. It was also possible to identify how each different nanoparticle affected the molecular dynamic of nanocomposite, correlating the dynamic-mechanical analysis with the NMR data of the saturated carbons of the elastomer.
authors.affiliation: LIEC - Interdisciplinary Laboratory of Electrochemistry and Ceramics, Department of Chemistry, UFSCar - Federal University of São Carlos, Rod. Washington Luis km 235, CP 676, 13565-905 São Carlos, SP, Brazil. Electronic address: renata.lang89@gmail.com.
authors.forename: Renata L
authors.initials: RL
authors.lastname: Sala
authors.affiliation: Department of Chemistry, UFSCar - Federal University of São Carlos, Rod. Washington Luis km 235, CP 676, 13565-905 São Carlos, SP, Brazil. Electronic address: tatielih.pdo@gmail.com.
authors.forename: Tatielih P
authors.initials: TP
authors.lastname: Oliveira Xavier
authors.affiliation: Department of Chemistry, UFSCar - Federal University of São Carlos, Rod. Washington Luis km 235, CP 676, 13565-905 São Carlos, SP, Brazil. Electronic address: t_venancio@yahoo.com.
authors.forename: Tiago
authors.initials: T
authors.lastname: Venâncio
authors.affiliation: Chemistry, Federal Institute of Education, Science and Technology Goiano, Sul Goiânia Avenue, km 1, Zona Rural, 75901-970 Rio Verde, GO, Brazil. Electronic address: tmarantes@yahoo.com.br.
authors.forename: Tatiane Moraes
authors.initials: TM
authors.lastname: Arantes
authors.affiliation: Department of Chemistry, UFSCar - Federal University of São Carlos, Rod. Washington Luis km 235, CP 676, 13565-905 São Carlos, SP, Brazil. Electronic address: paranhos@ufscar.br.
authors.forename: Caio M
authors.initials: CM
authors.lastname: Paranhos
authors.affiliation: LIEC - Interdisciplinary Laboratory of Electrochemistry and Ceramics, Department of Chemistry, UFSCar - Federal University of São Carlos, Rod. Washington Luis km 235, CP 676, 13565-905 São Carlos, SP, Brazil. Electronic address: camargo@ufscar.br.
authors.forename: Emerson R
authors.initials: ER
authors.lastname: Camargo
keywords: Polymer–matrix composites; Solid state NMR; Thermomechanical properties