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首页> 外文期刊>Journal of Applied Polymer Science >Polyurethanes from benzene polyols synthesized from vegetable oils: Dependence of physical properties on structure
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Polyurethanes from benzene polyols synthesized from vegetable oils: Dependence of physical properties on structure

机译：从植物油合成的苯多元醇中的聚氨酯：物理性质对结构的依赖

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Asymmetric and symmetric aromatic triol isomers were synthesized from erucic acid. The pure asymmetric and symmetric triols were crosslinked with MDI into their corresponding polyurethane sheets. The physico-chemical properties of these polyurethanes were studied by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermogravimetric analysis coupled with Fourier transform infrared (TGA-FTIR) spectroscopy, and tensile analysis. The A-PU and S-PU demonstrated differences in their glass transition temperatures (T_g) and crosslinking densities. The difference in T_g of these polyurethanes could be explained by the differences in crosslinking densities, which could be related to the increase in steric hindrance, to the crosslinking MDI molecules, between adjacent hydroxyl groups of the asymmetric triol monomers. Overall, it was found that both polyurethanes had similar mechanical and thermal properties.
机译：由芥酸合成不对称和对称的芳族三醇异构体。将纯的不对称和对称三醇与MDI交联到其相应的聚氨酯片材中。通过傅立叶变换红外（FTIR）光谱，X射线衍射（XRD），差示扫描量热法（DSC），动态力学分析（DMA），热重分析与傅立叶变换红外光谱（TGA）一起研究了这些聚氨酯的理化性质-FTIR）光谱和拉伸分析。 A-PU和S-PU在玻璃化转变温度（T_g）和交联密度方面表现出差异。这些聚氨酯的T_g的差异可以通过交联密度的差异来解释，这可以与不对称三醇单体的相邻羟基之间与交联MDI分子的位阻增加有关。总的来说，发现两种聚氨酯具有相似的机械和热性能。

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