Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Luiz Gustavo de Moura da Silva Barbosa"'
Publikováno v:
Global Journal of Researches in Engineering. :27-34
Polypropylene is one of the most used materials in the world because of its easy processability and good mechanical properties under different applications. As a result, a lot of polypropylene waste is being generated and recycling is important. The
Autor:
Luiz Gustavo de Moura da Silva Barbosa, Carlos Alexandre Rech, Fábio Luis Knewitz, Luciano Goetems
Publikováno v:
International Journal of Metallurgical Engineering. 7:1-5
Lumped thermal systems are characterized by uniform interior temperature during heat transfer processes, having as only important factor the time. Thus, the present research has proposed to investigate one of these systems in order to determine a max
Publikováno v:
International Journal of Materials Engineering. 7:117-120
The present research proposed to evaluate the tensile and impact properties of polypropylene originating from secondary recycling. The polymer chosen for the studies was polypropylene (PP) for its high application and availability. The tensile and im
Autor:
Luiz Gustavo de Moura da Silva Barbosa, Bluma G. Soares, Raquel Santos Mauler, Vinicius Pistor
Publikováno v:
Polymer. 53:5798-5805
The epoxy resin curing process can be characterized by the formation of an inhomogeneous microstructure with cooperative rearranging regions (CRR). In this study, polyhedral oligomeric silsesquioxane (POSS) N-phenylaminopropyl was utilized as a subst
Autor:
R.V.B. Oliveira, Luiz Gustavo de Moura da Silva Barbosa, Raquel Santos Mauler, Giovanna Machado, Leonardo Bresciani Canto, Otávio Bianchi
Publikováno v:
Journal of Applied Polymer Science. 128:811-827
Hybrid nanocomposites of polystyrene (PS) and methacryl phenyl polyhedral oligomeric silsesquioxane (POSS) were syn- thesized by reactive melt blending in the mixing chamber of a torque rheometer using dicumyl peroxide (DCP) as a free radical ini- ti
Tuning of polypropylene wettability by plasma and polyhedral oligomeric silsesquioxane modifications
Autor:
Luiz Gustavo de Moura da Silva Barbosa, Leandra Franciscato Campo, Ricardo Vinicius Bof de Oliveira, Flavio Horowitz, Cesar Henrique Wanke, João Luiz Feijó
Publikováno v:
Polymer. 52:1797-1802
In this work, we have exposed polypropylene (PP) to plasma treatment and then reactively coated with polyhedral oligomeric silsesquioxane-isothiocyanate (POSS-NCS) in order to modify both of its surface characteristics: chemical composition and rough
Autor:
Willyan Hasenkamp, Ricardo Meurer Papaléo, Rafael Gustavo Torres Leal, Luiz Gustavo de Moura da Silva Barbosa
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 242:190-193
We report on measurements of relaxation times of craters and rims induced by 20 MeV Au ions bombarding PMMA targets at temperatures near the glass transition. PMMA thin films were bombarded at grazing angles and at low fluences (∼10 9 cm −2 ). Th
Autor:
Ricardo Meurer Papaléo, R. S. Thomaz, C. R. B. Esteves, M. R. Silva, Luiz Gustavo de Moura da Silva Barbosa
Publikováno v:
physica status solidi c. 10:611-613
In this work, crater formation by single 20 MeV Au ions on ultra-thin poly(methyl methacrylate) (PMMA) films was systematically investigated as a function of the thickness t of the layers (2 nm
Autor:
Flavio Horowitz, Luiz Gustavo de Moura da Silva Barbosa, Cesar Henrique Wanke, Raquel Santos Mauler, Júlia Viola Matzenbacher Hübner, Ricardo Vinicius Bof de Oliveira
Publikováno v:
Polímeros, Volume: 22, Issue: 2, Pages: 158-163, Published: 22 MAY 2012
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Polímeros v.22 n.2 2012
Polímeros (São Carlos. Online)
Associação Brasileira de Polímeros (ABPol)
instacron:ABPO
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Polímeros v.22 n.2 2012
Polímeros (São Carlos. Online)
Associação Brasileira de Polímeros (ABPol)
instacron:ABPO
Tratamentos superficiais por plasma e ultravioleta de vácuo (VUV) foram utilizados para introduzir grupos funcionais contendo oxigênio em amostras de polipropileno, com objetivo de modificar sua molhabilidade. Análises por ATR-FTIR, AFM e ângulo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dd2d576a5f915dc0800de4025f05321
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282012000200010&lng=en&tlng=en
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282012000200010&lng=en&tlng=en
Autor:
Ricardo Meurer Papaléo, Luiz Gustavo de Moura da Silva Barbosa, Willian Hasenkamp Carreira, Ivo Bello, Agostinho Antônio Bulla, Rafael Gustavo Torres Leal
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
We report on measurements of relaxation times of nanometer-sized deformations resulting from the impact of individual energetic ions on poly(methyl methacrylate) surfaces at temperatures close to and below the glass transition T{sub g}. The temporal