Sodium montmorillonite modified with methacryloxy and vinylsilanes: Influence of silylation on the morphology of clay/unsaturated polyester nanocomposites

Romanzini, Daiane; Piroli, Vanessa; Frache, Alberto; Zattera, Ademir J.; Amico, Sandro Campos

doi:10.1016/j.clay.2015.07.003

Cited by 60 publications

(41 citation statements)

References 30 publications

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“…The LOI value did not show significant variation upon clay addition, and the highest LOI was found for the P‐Na‐GF sample. A slight reduction in linear burning rate was noticed for the samples with greater dispersion (P‐30B‐GF and P‐30B (MPS) ‐GF), as reported in previous studies .…”

Section: Resultssupporting

confidence: 86%

Thermal and fire retardancy studies of clay‐modified unsaturated polyester/glass fiber composites

Romanzini

Cuttica²,

Frache³

et al. 2015

Polymer Composites

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The aim of this study was to investigate the effect of new, cation‐exchanged, and silane modified montmorillonite nanoclays fillers on thermal, mechanical and flammability characteristics of polyester/glass fiber composites in comparison with composites prepared with calcium carbonate filler. The coefficient of thermal expansion showed reduced values for silane‐modified samples. All the composites decomposed at lower temperatures in air and their degradation behavior differed from those exposed to nitrogen. The glass fibers acted as a physical barrier before combustion and the catalytic effect of the clay was less pronounced for silane‐modified samples. The peak of heat release and linear burning rate for the silane‐modified Cloisite 30B sample was reduced. However, the limiting oxygen index did not show significant changes. In general, consequent to clay addition, these composites showed improved fire performance, shorter fire duration and slower fire growth and maintained better mechanical properties than those with calcium carbonate filler. POLYM. COMPOS., 38:2743–2752, 2017. © 2015 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 86%

Thermal and fire retardancy studies of clay‐modified unsaturated polyester/glass fiber composites

Romanzini

Cuttica²,

Frache³

et al. 2015

Polymer Composites

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“…At approximately 2θ = 4.6° (corresponding to a basal spacing of 1.9 nm), a characteristic peak of montmorillonite clay is observed, which indicates a partially intercalated morphology. A similar result was obtained by Romanzini et al . when assessing the incorporation of MMT‐30B as a flame retardant in a polyester resin.…”

Section: Resultssupporting

confidence: 85%

Development of acrylic‐based powder coatings with incorporation of montmorillonite clays

Catarina

Borsoi

Romanzini

et al. 2017

J of Applied Polymer Sci

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Powder coatings have been receiving attention because they are environmentally friendly. They do not contain solvents in their composition, and their components have decorative and corrosion‐protection functions, among many others. However, the presence of polymers in their composition increases the risk of combustion in adverse situations. In this context, this study aims to develop and characterize acrylic‐based powder paints with the addition of 2 wt % and 4 wt % montmorillonite clays (MMT) as Cloisite 30B (MMT‐30B) and Cloisite 15A (MTT‐15A), employed as flame retardants. The characterization of the coatings was carried out by thermogravimetric analysis (TGA), X‐ray diffraction, and scanning electron microscopy. After application of the coatings on carbon steel substrates, flammability tests were performed. The coatings with 2 wt % MMT‐30B showed overall better results, especially in the flammability tests. Flames spread less on these coatings than on the other systems. However, when the surface and bottom temperatures were analyzed by the cone calorimeter test, the samples prepared with 4 wt % MMT‐15A were considered safer to be applied in fire scenarios. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45031.

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“…The heat of reaction decreases in comparison to the untreated sample. Lower enthalpy values can be observed for silane treated nanoclays which are associated with better dispersion of silanized fillers due to the intercalation of platelets . For GPTMS‐functionalized mixtures, a higher number of epoxy groups on the surface of the nanoplatelets can react with the curing agent, yielding covalent bonds with the epoxy network, since both polymer and GrNP‐G display these groups.…”

Section: Resultsmentioning

confidence: 99%

“…The crosslink density (CD) was obtained from the storage modulus curves according to the rubber elasticity theory, calculated using eq. :

{E^{'}}_{r} = 3 ϕ v_{e} R T

where

{E^{'}}_{r}

is the storage modulus in the rubbery region (MPa), φ is the ratio between the experimental and the theoretical storage modulus, v e is the crosslink density (mol m −3 ), R is the universal gas constant (8.314 J mol −1 K −1 ), and T is the reference temperature in K. And the effectiveness coefficient ( C ) of the nanocomposites was calculated according to Romanzini et al …”

Section: Methodsmentioning

confidence: 99%

Mechanical and dynamic‐mechanical properties of silane‐treated graphite nanoplatelet/epoxy composites

Lavoratti

Zattera

Amico

2018

J of Applied Polymer Sci

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Thermoset resins are widely used for composite applications due to their excellent mechanical properties. To further enhance their performance, nanofillers such as graphite nanoplatelets (GrNP) have been used, and extra improvement may arrive from surface treating these fillers. This study aims to evaluate the influence of GrNP content and treatment with (3‐glycidyloxypropyl)trimethoxysilane and (3‐aminopropyl)triethoxysilane on curing behavior and mechanical and dynamic mechanical properties of GrNP/epoxy composites. Composites reinforced with 0.25 wt % GrNP displayed increased tensile strength by 11.8% compared to the neat resin. Addition of 0.5 wt % GrNP increased the glass transition temperature in 10°C compared to the neat polymer. Silane treated fillers showed an improvement in tensile strength and dynamic‐mechanical properties compared to the neat resin and non‐treated GrNP/epoxy composites at similar filler content. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46724.

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Sodium montmorillonite modified with methacryloxy and vinylsilanes: Influence of silylation on the morphology of clay/unsaturated polyester nanocomposites

Cited by 60 publications

References 30 publications

Thermal and fire retardancy studies of clay‐modified unsaturated polyester/glass fiber composites

Thermal and fire retardancy studies of clay‐modified unsaturated polyester/glass fiber composites

Development of acrylic‐based powder coatings with incorporation of montmorillonite clays

Mechanical and dynamic‐mechanical properties of silane‐treated graphite nanoplatelet/epoxy composites

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