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Your search keyword '"Virginia Ribeiro da Silva"' showing total 2 results
Start Over Author "Virginia Ribeiro da Silva" Publisher associacao brasileira de polimeros
2 results on '"Virginia Ribeiro da Silva"'

1. Synthesis of flexible polyurethane foams by the partial substitution of polyol by steatite

Author

Plínio César de Carvalho Pinto, Virginia Ribeiro da Silva, Maria Irene Yoshida, and Marcone Augusto Leal de Oliveira

Subjects
composites, foam, steatite, mechanical properties, polyurethanes, Chemical technology, TP1-1185
Abstract

Abstract This work describes the synthesis of composites steatite/flexible polyurethane by replacing 4.5 wt. % of polyol with steatite rock powder. We evaluated two mechanical properties of composites (comfort factor and support factor) for various formulations based on a fractional factorial design. The new synthesized composites showed higher support factor, greater comfort factor, and lower cost, compared to conventional flexible polyurethane foams. There is not a significant change in the chemical composition of the foams, due to substitution of 4.5 wt. % polyol by steatite. However, there was a decrease in cell size and greater interaction between the hard segments of the composite.

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2. Synthesis of flexible polyurethane foams by the partial substitution of polyol by steatite

Author

Virginia Ribeiro da Silva, Marcone Augusto Leal de Oliveira, Plínio César de Carvalho Pinto, and Maria Irene Yoshida

Subjects
Materials science, Composite number, polyurethanes, 02 engineering and technology, Partial substitution, mechanical properties, 010402 general chemistry, lcsh:Chemical technology, 01 natural sciences, composites, chemistry.chemical_compound, Polyol, Chemical Engineering (miscellaneous), lcsh:TP1-1185, Composite material, Polyurethane, chemistry.chemical_classification, Organic Chemistry, Fractional factorial design, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Lower cost, 0210 nano-technology, foam, steatite
Abstract

This work describes the synthesis of composites steatite/flexible polyurethane by replacing 4.5 wt. % of polyol with steatite rock powder. We evaluated two mechanical properties of composites (comfort factor and support factor) for various formulations based on a fractional factorial design. The new synthesized composites showed higher support factor, greater comfort factor, and lower cost, compared to conventional flexible polyurethane foams. There is not a significant change in the chemical composition of the foams, due to substitution of 4.5 wt. % polyol by steatite. However, there was a decrease in cell size and greater interaction between the hard segments of the composite.

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