Meiorin, Cintia; Calvo-Correas, Tamara; Mosiewicki, Mirna Alejandra; Aranguren, Mirta Ines; Corcuera, Maria Angeles; Eceiza, Arantxa published the artcile< Comparative effects of two different crosslinkers on the properties of vegetable oil-based polyurethanes>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is crosslinked polyol based polyurethane comparative preparation property.
Thermoset polyurethanes (PUs) were prepared from a polyol derived from castor oil, 4,4′;-methylene di-Ph diisocyanate (MDI) and different trifunctional low-mol.-weight crosslinkers, biobased glycerol (Gly) and petroleum-derived trimethylolpropane (TMP). The synthesis was carried out in bulk and without catalyst via one-step polymerization varying the components equivalent weight ratio, Polyol:MDI:Gly and Polyol:MDI:TMP, resp. The physicochem., morphol., thermal, dynamic-mech., and mech. properties of the PUs were determined The success of the reaction between the polyol and MDI was confirmed by Fourier transform IR spectroscopy. The dynamic-mech. and the mech. properties as well as hardness were determined and related to the concentration of the low-mol.-weight crosslinkers utilized (Gly or TMP). However, important differences were observed between the synthesized two series, due to phase separation produced during the curing reaction, which affected more the materials prepared from TMP. SEM images and dynamic-mech. results confirmed this difference, related to the reactivity of primary and secondary hydroxyls present in the crosslinkers. Thermogravimetric anal. also showed to be sensible to the different structure of the crosslinkers with TMP leading to more thermally stable samples. Finally, measurements of water contact angle indicated that the surfaces were mostly hydrophobic with minor differences between the samples.
Journal of Applied Polymer Science published new progress about Complex modulus, tan δ. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.
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