Iran Polymers and Petrochemicals Institute, PO Box 14965/115, Tehran, Iran.
Carbohydr Polym. 2013 Jan 30;92(1):490-6. doi: 10.1016/j.carbpol.2012.09.046. Epub 2012 Oct 2.
A series of aqueous polyurethane dispersions were synthesized by the reaction of polytetramethylene glycol and isophorone diisocyanate, extended with dimethylol propionic acid. Their chemical structures were characterized using FTIR, (1)H NMR, and (13)C NMR, and thermal properties were determined by DMTA. Then, a number of aqueous polyurethane dispersions-sodium alginate (PUD/SA) compositions were prepared by addition of sodium alginate solution with different concentrations into the aqueous polyurethane dispersion. Characterization of chemical structure and thermal properties of these blends were performed by FTIR, EDX and DMTA, respectively. The morphology of the alginate in polyurethane matrix was studied by SEM. The hydrophilicity of the prepared samples decreases by increasing the content of sodium alginate in blends. These observations were attributed to the increase of hydrophilicity of the blends as a consequence of addition of hydrophilic carboxylate, hydroxyl and ether functional groups of the alginate to them.
一系列水性聚氨酯分散体是通过聚四氢呋喃二醇和异佛尔酮二异氰酸酯的反应合成的，并用二羟甲基丙酸进行了扩展。使用 FTIR、（1）H NMR 和（13）C NMR 对其化学结构进行了表征，并通过 DMTA 测定了热性能。然后，通过将不同浓度的海藻酸钠溶液加入到水性聚氨酯分散体中，制备了多种水性聚氨酯分散体-海藻酸钠（PUD/SA）组合物。通过 FTIR、EDX 和 DMTA 分别对这些共混物的化学结构和热性能进行了表征。通过 SEM 研究了海藻酸钠在聚氨酯基体中的形态。随着共混物中海藻酸钠含量的增加，样品的亲水性降低。这些观察结果归因于由于共混物中添加了亲水性的羧酸盐、羟基和醚官能团，从而增加了共混物的亲水性。
