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AuthorSibeko, M.A.
AuthorSaladino, M.L.
AuthorLuyt, A.S.
AuthorCaponetti, E.
Available date2017-03-01T08:01:36Z
Publication Date2016-04
Publication NameJournal of Materials Scienceen_US
CitationSibeko, M.A., Saladino, M.L., Luyt, A.S. "Morphology and properties of poly(methyl methacrylate) (PMMA) filled with mesoporous silica (MCM-41) prepared by melt compounding" Journal of Materials Science, 2016, Volume 51, Issue 8, pp 3957–3970
AbstractThis paper reports on the morphologies of poly(methyl methacrylate) (PMMA)/mesoporous silica (MCM-41) composites prepared by melt compounding with various MCM-41 contents in the range of 0.1–5 wt%, the interactions between the polymer and filler in these composites, and their thermomechanical, mechanical and thermal degradation properties. The composites formed transparent films at low filler loadings (\0.5 wt%) because of well-dispersed, unagglomerated particles. The presence of polymer did not alter the pore dimensions in the MCM-41 structure and it maintained its hexagonal structure, even though the polymer chains partially penetrated the pores during composite preparation. The PMMA interacted with the MCM-41 through hydrogen bonding. The glass transition temperature, as well as storage and loss modulus of PMMA increased with addition of, and increase in the amount of, MCM-41 due to the interaction of the polymer chains with the porous filler which restricted the mobility of the polymer chains and increased the stiffness of the composites. The thermal stability of PMMA apparently increased in the presence of MCM-41, although this observation probably was the result of delayed mass loss because of the trapping of volatile degradation products in the pores of MCM-41. The presence of MCM-41, up to 1.0 wt%, increased the impact strength of PMMA.
SponsorThe National Research Foundation of South Africa is acknowledged for providing the bursary funding which enabled the student to do the research presented in this paper. The University of Palermo supported this research through the CORI2013 (Bando per la concessione di contribute per l’avvio e lo sviluppo di collaborazioni dell’Ateneo 2013-Azione D—prot 32827 del 2/5/2013). NMR and TEM experimental data were provided by Centro Grandi Apparecchiature-UniNetLab-Universita` di Palermo funded by P.O.R. Sicilia 2000–2006, Misura 3.15 Azione C Quota Regionale.
SubjectThermal stability
SubjectMaterials science
TitleMorphology and properties of poly(methyl methacrylate) (PMMA) filled with mesoporous silica (MCM-41) prepared by melt compounding
Issue Number8
Volume Number51

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