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RESEARCH PRODUCT
The effect of silica nanoparticles on the morphology, mechanical properties and thermal degradation kinetics of PMMA
Alberto SpinellaGiorgio NasilloT.e. MotaungAdriaan S. LuytMaria Luisa SaladinoEugenio Caponettisubject
chemistry.chemical_classificationThermogravimetric analysisNanocompositeMaterials sciencePolymers and PlasticsPMMA Silica 13C{1H} CP-MAS NMR Degradation kineticsInfrared spectroscopyNuclear magnetic resonance spectroscopyDynamic mechanical analysisPolymerCondensed Matter PhysicsAmorphous solidChemical engineeringchemistryMechanics of MaterialsMaterials ChemistryFourier transform infrared spectroscopyComposite materialSettore CHIM/02 - Chimica Fisicadescription
Abstract Silica–PMMA nanocomposites with different silica quantities were prepared by a melt compounding method. The effect of silica amount, in the range 1–5 wt.%, on the morphology, mechanical properties and thermal degradation kinetics of PMMA was investigated by means of transmission electron microscopy (TEM), X-ray diffractometry (XRD), dynamic mechanical analysis (DMA), thermogravimetric analyses (TGA), Fourier-transform infrared spectroscopy (FTIR), 13 C cross-polarization magic-angle spinning nuclear magnetic resonance spectroscopy ( 13 C{ 1 H} CP-MAS NMR) and measures of proton spin-lattice relaxation time in the rotating frame ( T 1 ρ ( H )), in the laboratory frame ( T 1 ( H )) and cross-polarization times ( T CH ). Results showed that silica nanoparticles are well dispersed in the polymeric matrix whose structure remains amorphous. The degradation of the polymer occurs at higher temperature in the presence of silica because of the interaction between the two components.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-03-01 |