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

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

doi:10.1590/0104-1428.10417

Acessibilidade / Reportar erro

Brasil

Español English

sumário « anterior atual seguinte »

Sumário

Original Article • Polímeros 28 (4) • Sept 2018 • https://doi.org/10.1590/0104-1428.10417 copy

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

Authorship SCIMAGO INSTITUTIONS RANKINGS

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.

Keywords:
composites; foam; steatite; mechanical properties; polyurethanes

Oxides	(wt. %)	Oxides	(wt. %)
MgO	30.7	K₂O	0.1
SiO₂	49.6	Na₂O	0.1
Al₂O₃	2.3	Cr₂O₃	0.5
CaO	1.2	MnO	0.1
Fe₂O₃	8.8	NiO	0.1

Tests	Factors					Answers
Tests	Polyol + steatite (%)	Isocyanate index	Tin catalyst (%)	Amine catalyst (%)	Silicone (%)	Comfort factor (arb. unit)	Support factor (kPa mm^-2)
1	100.00 + 0.00	105	0.1	0.6	0.8	0.00	0.00
2	95.50 + 4.50	105	0.1	0.6	0.6	0.00	0.00
3	100.00 + 0.00	125	0.1	0.6	0.6	2.55	3.72
4	95.50 + 4.50	125	0.1	0.6	0.8	2.83	4.91
5	100.00 + 0.00	105	0.2	0.6	0.6	2.46	3.74
6	95.50 + 4.50	105	0.2	0.6	0.8	2.48	3.38
7	100.00 + 0.00	125	0.2	0.6	0.8	2.54	4.10
8	95.50 + 4.50	125	0.2	0.6	0.6	2.66	4.87
9	100.00 + 0.00	105	0.1	1.0	0.6	0.00	0.00
10	95.50 + 4.50	105	0.1	1.0	0.8	0.00	0.00
11	100.00 + 0.00	125	0.1	1.0	0.8	2.73	3.50
12	95.50 + 4.50	125	0.1	1.0	0.6	3.04	4.61
13	100.00 + 0.00	105	0.2	1.0	0.8	2.41	3.12
14	95.50 + 4.50	105	0.2	1.0	0.6	2.57	4.30
15	100.00 + 0.00	125	0.2	1.0	0.6	2.65	3.89
16	95.50 + 4.50	125	0.2	1.0	0.8	2.70	4.56
17	97.75 + 2.25	115	0.15	0.8	0.7	2.75	4.31
18	97.75 + 2.25	115	0.15	0.8	0.7	2.49	4.34
19	97.75 + 2.25	115	0.15	0.8	0.7	2.47	4.13

Associação Brasileira de Polímeros Rua São Paulo, 994, Caixa postal 490, São Carlos-SP, Tel./Fax: +55 16 3374-3949 - São Carlos - SP - Brazil
E-mail: revista@abpol.org.br

Acompanhe os números deste periódico no seu leitor de RSS

[1] * plinioccp@yahoo.com.br