Department of Chemistry, University of Agriculture, Faisalabad 38040, Pakistan.
Department of Applied Chemistry, Government College University, Faisalabad 38030, Pakistan.
Int J Biol Macromol. 2020 Mar 1;146:243-252. doi: 10.1016/j.ijbiomac.2019.12.234. Epub 2019 Dec 28.
Starch/chitosan modified polyurethanes (PUs) were synthesized by step growth polymerization reaction between -NCO terminated prepolymer and chain extenders (1,4-Butanediol/starch/chitosan). Isophorone diisocyanate (IPDI) was reacted with hydroxyl-terminated polybutadiene (HTPB) to synthesize prepolymer and was further reacted with different moles ratio of starch/chitosan to produced five samples of polyurethane (PU). These samples were characterized by Fourier transformed infrared (FTIR) and Proton nuclear magnetic resonance (H NMR) spectroscopy. The surface characterizations of PUs were done by scanning electron microscope (SEM). Thermogravimetric analysis showed that the thermal stability of PUs was higher when the mixture of both natural materials was used at equal amounts. It is concluded that combination of both starch and chitosan are efficient for the synthesis of PUs.
淀粉/壳聚糖改性聚氨酯（PUs）通过-NCO 封端预聚物与扩链剂（1,4-丁二醇/淀粉/壳聚糖）之间的逐步聚合反应合成。异佛尔酮二异氰酸酯（IPDI）与端羟基聚丁二烯（HTPB）反应合成预聚物，然后与不同摩尔比的淀粉/壳聚糖进一步反应，制备了五种聚氨酯（PU）样品。这些样品通过傅里叶变换红外（FTIR）和质子核磁共振（H NMR）光谱进行了表征。通过扫描电子显微镜（SEM）对 PUs 的表面特性进行了表征。热重分析表明，当等量使用两种天然材料的混合物时，PUs 的热稳定性更高。结论是，淀粉和壳聚糖的组合对于 PUs 的合成是有效的。
