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Study of castor oil polyurethane - poly (methyl methacrylate) semi-interpenetrating polymer network (SIPN) reaction parameters using a 2³ factorial experimental design

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Study of castor oil polyurethane - poly (methyl methacrylate) semi-interpenetrating polymer network (SIPN) reaction parameters using a 2³ factorial experimental design

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Título Study of castor oil polyurethane - poly (methyl methacrylate) semi-interpenetrating polymer network (SIPN) reaction parameters using a 2³ factorial experimental design
Autor Cunha, Fernanda Oliveira Vieira da
Melo, Diogo Henrique Roesler
Veronese, Vinicius Bassanesi
Forte, Maria Madalena de Camargo
Abstract In this work was employed a 23 factorial experiment design to evaluate the castor oil polyurethane- poly(methyl methacrylate) semi-IPN synthesis. The reaction parameters used as independent variables were NCO/OH molar ratio, polyurethane polymerization time and methyl methacrylate (MMA) content. The semi-IPNs were cured over 28 h using two thermal treatments. The polymers were characterized by infrared and Raman spectroscopy, thermal analysis and swelling profiles in n-hexane. The glass transition temperature (Tg) and the swelling were more affect by the NCO/OH molar ratio variation. The semi-IPNs showed Tg from - 27 to - 6 °C and the swelling range was from 3 to 22%, according to the crosslink density. The IPN mechanical properties were dependent on the cure temperature and MMA content in it. Lower elastic modulus values were observed in IPNs cured at room temperature.
Contido em Materials research : revista ibero-americana de materiais. São Carlos, SP. vol. 7, no. 4 (Oct./Dec. 2004), p. 539-543
Assunto Polímeros
[en] Castor oil
[en] Experimental design
[en] Poly (methyl methacrylate)
[en] Semi-IPN
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/19877
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