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首页> 外文期刊>Journal of Applied Polymer Science >Modification of tung oil-based polyurethane foam by anhydrides and inorganic content through esterification process
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Modification of tung oil-based polyurethane foam by anhydrides and inorganic content through esterification process

机译：通过酯化法通过酸酐和无机含量改变桐油基聚氨酯泡沫

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In this study, we have reported the synthesis of modified polyol from tung oil. The synthesis involves three steps: first, conversion of tung oil to hydroxylated tung oil by hydroxylation; second, alcoholysis with triethanolamine; and finally, the esterification of polyester polyol when reacted with phthalic anhydride (PA) or maleic anhydride (MA). Boric acid is also introduced into the polyol by chemical modification, which enhances the thermal properties of polyurethane foam (PUF). PUF is formulated by the reaction between polyol and isocyanate. A systematic comparison of flame retardancy and mechanical and thermal properties of modified PUF has been examined. The structural properties of modified polyol were characterized by Fourier transform infrared spectroscopy, proton NMR spectroscopy, and gel permeation chromatography, while the thermal and mechanical properties of the formulated PUF were studied by scanning electron microscopy, limiting oxygen index, differential scanning calorimetry, Izod impact, and flexural and compression strength. Thus PUF prepared from modified polyol with a proper distribution of soft and hard segments possesses better mechanical and thermal properties. The PA-modified foams show better properties compared to unmodified and MA-modified foams due to the aromaticity and crosslinking behavior of PA. (C) 2017 Wiley Periodicals, Inc.
机译：在这项研究中，我们已经报道了来自桐油的改性多元醇的合成。合成涉及三个步骤：首先，通过羟基化将桐油转化为羟基化桐油;二，用三乙醇胺醇分解;最后，与邻苯二甲酸酐（Pa）或马来酸酐（MA）反应时聚酯多元醇的酯化。通过化学改性还通过化学改性将硼酸引入多元醇中，这提高了聚氨酯泡沫（PUF）的热性质。 PUF通过多元醇和异氰酸酯之间的反应配制。研究了改性PUF的阻燃性和机械和热性能的系统比较。通过傅里叶变换红外光谱，质子NMR光谱和凝胶渗透色谱法表征改性多元醇的结构性质，同时通过扫描电子显微镜，限制氧指数，差示扫描量热法，Izod冲击来研究配制的PUF的热和力学性能和弯曲和压缩强度。因此，由改性多元醇制备的PUF具有适当分布的软和硬链段具有更好的机械和热性能。由于PA的芳香性和交联行为，PA改性的泡沫与未经修改和MA修饰的泡沫相比表现出更好的性质。 （c）2017 Wiley期刊，Inc。

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