title: Novel silicon-containing polyurethanes from vegetable oils as renewable resources. Synthesis and properties.
abstract: Hydrosilylation of methyl 10-undecenoate (UDM) with phenyl tris(dimethylsiloxy)silane (PTDS) followed by a reduction of carboxylate groups was used to obtain a silicon-containing polyol with terminal primary hydroxyl groups (PSi194). Biobased silicon-containing polyurethanes, with a silicon content between 1.7% and 9.0%, were prepared from epoxidized methyl oleate-based polyether polyol (P184), PSi194, and 4,4'-methylenebis(phenyl isocyanate) (MDI). The thermal, mechanical, and flame-retardant properties of these materials were examined. The most notable change resulting from the incorporation of PSi194 is the appearance of melting endotherms of variable enthalpy and position and a downward shift in the T(g). The incorporation of silicon does not change the thermal stability but enhances the stability of the char under air atmosphere. Polyurethanes with higher silicon content no longer burn in ambient air without complementary oxygen, which suggests that these biobased materials are very interesting for applications that require fire resistance.
authors.affiliation: Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, Campus Sescelades, Marcel.lí Domingo s/n, 43007 Tarragona, Spain.
authors.forename: Gerard
authors.initials: G
authors.lastname: Lligadas
authors.forename: Juan C
authors.initials: JC
authors.lastname: Ronda
authors.forename: Marina
authors.initials: M
authors.lastname: Galià
authors.forename: Virginia
authors.initials: V
authors.lastname: Cádiz
mesh_terms: D017646:Organosilicon Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D011140:Polyurethanes / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D017646:Organosilicon Compounds; D010938:Plant Oils; D011140:Polyurethanes