Luiz A. F. Coelho
Universidade do Estado de Santa Catarina
MiscibilityUltimate tensile strengthSupercritical fluidGlass transitionCuring (chemistry)CopolymerComposite materialEpoxyThermosetting polymerChemistrySelf-diffusionMaterials scienceDifferential scanning calorimetryChemical engineeringElastic modulusCrystallinityCarbon nanotubePolymerMolecular dynamicsNanocompositeThermodynamics
63Publications
17H-index
830Citations
Publications 61
Newest
#1Marcia B. Schuster (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Iury Körting de Abreu (UDESC: Universidade do Estado de Santa Catarina)
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
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#1Bruna Louise Silva (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Marcia B. Schuster (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
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This work studies the effects of combining triblock copolymers with carbon nanoparticles (carbon nanotubes, graphene and carbon black) on curing kinetics. The chosen triblock copolymer was poly (propylene glycol)-block-poly (ethylene glycol)-block-poly (propylene glycol) (PPG-b-PEG-b-PPG), which has different contents of PEG in its structure. The main objective is to investigate the influence of the miscibility of the PPG-b-PEG-b-PPG copolymer in epoxy nanocomposites. The PEG fraction in the cop...
1 CitationsSource
#1Bruna Louise Silva (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Marcia B. Schuster (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
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#1Juliana C. Frankowiak (UDESC: Universidade do Estado de Santa Catarina)
#2Roger H. Bello (UDESC: Universidade do Estado de Santa Catarina)H-Index: 5
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
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#2Sandro Campos Amico (UFRGS: Universidade Federal do Rio Grande do Sul)H-Index: 36
Last. Sérgio Henrique PezzinH-Index: 19
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ABSTRACTIn this work, an epoxy resin modified by silsesquioxane oligomers was used to produce multi-component nanocomposites reinforced with carbon fiber (CF) and multi-walled carbon nanotubes (CNT...
1 CitationsSource
#1Carlos V. Opelt (CUA: The Catholic University of America)H-Index: 8
#1C.V. Opelt (CUA: The Catholic University of America)
Last. L.A.F. Coelho (UDESC: Universidade do Estado de Santa Catarina)
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Abstract The main goal of this work is to enlighten the common misinterpretation of “plastic” deformation in thermoset polymers by exploring the concept of pseudo-ductility. To do so, different nanostructured epoxy resins were manufactured by using different nanoparticles and a block copolymer, in different amounts, and then submitted to tensile tests. The results showed that rigid nanoparticles are able to increase the stiffness and strength in 16% and 22% respectively for samples with 0.5% of ...
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#1Roger H. Bello (UDESC: Universidade do Estado de Santa Catarina)H-Index: 5
#2Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
Abstract In this work the role of the addition of barium titanate (BaTiO 3 ) or multi-walled carbon nanotubes (MWCNT) on curing kinetics of the polyhexahydro-s-triazine (PHT) was investigated. The estimation of kinetic parameters triplet (activation energy, pre-exponential factor, and the reaction model) of PHT and its nanocomposites were made by isoconversional models. It is possible to state the conversion of the polyhemiaminal (PHA) into PHT polymer and all nanocomposites studied in this work...
2 CitationsSource
#1Marcia B. Schuster (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
5 CitationsSource
#1Marcia B. Schuster (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Carlos V. OpeltH-Index: 8
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
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In this work, the relations between fracture surface roughness in mode I and the content of different carbon nanoparticles, graphene nanoplatelets (GNP) and carbon nanotubes (CNT) were systematically investigated. A block copolymer (BC) was also used to aid the dispersion process considering its role on fracture toughness. Both KIc and GIc were found to increase significantly with the addition of a BC along with carbon nanoparticles. Roughness measurements showed that the value of surface roughn...
7 CitationsSource
#1Bruna Louise Silva (UDESC: Universidade do Estado de Santa Catarina)H-Index: 2
#2Roger H. Bello (UDESC: Universidade do Estado de Santa Catarina)H-Index: 5
Last. Luiz A. F. Coelho (UDESC: Universidade do Estado de Santa Catarina)H-Index: 17
view all 3 authors...
11 CitationsSource