Poly Methyl Metacrylate Pmma
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. Estudo do ensaio de determinação da tenacidade à fratura em deformação plana (KIc) em PMMA e análise das tensões desenvolvidas por fotoelasticidade. / Study of test for determining fracture toughness in plane strain (KIc) in PMMA and stress analysis developed by photoelasticity.
Single-Edge-Notch Bending samples produced out of compression-molded plates obtained from a commercial Poly(methyl metacrylate), PMMA, resin were investigated concerning the influence of the adopted pre-cracking methodology on plane strain fracture toughness results according to ASTM D 5045 standard. Two sets of 6 samples each were pre-cracked using a sharp-
Publicado em: 2010
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2. CompÃsitos de Poli (Metacrilato de Metila) / nanofolhas de grafite: preparaÃÃo, caracterizaÃÃo e efeitos radiolÃticos / Nanocomposites of Poly (Methyl Metacrylate)/Graphite nanosheets: Preparation, Characterization and Radiolytic Effects
Nowadays there is a great interest in the preparation of PMMA/graphite composites, el ther in graphite powder or in nanosheet forms. They are used mainly in the production of conducting composites. In this work graphite nanosheets were obtained by chemical intercalation using H2SO4 and HNO3. After this treatment, the intercalated graphite (GIC) is put into a
Publicado em: 2007
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3. New nuclear magnetic resonance methods for studying slow dynamics in organic solids: applications to polymers and proteins / Novas metodologias de ressonância magnética nuclear para o estudo da dinâmica lenta em materiais orgânicos no estado sólido: aplicações em polímeros e proteínas
Solid-State Exchange NMR is an important method to characterize details of dynamic process in materials science. However, the application of these techniques to study complex materials has been limited. In this work new solid-state Exchange NMR techniques, which allows efficient analysis of molecular motions in the millisecond time scale, are presented. The
Publicado em: 2001