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首页> 外文期刊>Journal of Applied Polymer Science >Thermal degradation of a phenolic resin, vegetable fibers, and derived composites
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Thermal degradation of a phenolic resin, vegetable fibers, and derived composites

机译：酚醛树脂，植物纤维和衍生复合材料的热降解

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The thermal degradation behavior of resol, several vegetable fibers (two types of cotton fibers, sisal and sugar cane bagasse) and derived polymer composites have been investigated using thermogravimetric analysis (TGA). The initial thermal degradation temperature T-ONSET, the temperature at the maximum degradation rate TDM, and the char left at 500 degrees C corresponding to the crosslinked resol were higher than the values measured for the fibers and their composites. Thus, the addition of the fibers reduced the thermal resistance of the phenolic thermoset. The polymer and the fiber-composites showed a complex degradation involving different thermal decomposition processes. For that reason, the DTG curves were deconvoluted and a phenomenological kinetic expression was found for each individual peak. The overall thermal decomposition curve was recalculated adding each degradation process weighted according to its contribution to the total weight loss. An increase in the activation energy corresponding to the cellulose degradation was observed in the composites, highlighting the protective action of the resin encapsulating the fibers. (c) 2007 Wiley Periodicals, bic.
机译：使用热重分析（TGA）研究了甲阶酚醛树脂，几种植物纤维（两种类型的棉纤维，剑麻和甘蔗渣）和衍生的聚合物复合材料的热降解行为。初始热降解温度T-ONSET，最大降解速率TDM下的温度以及在500℃下残留的与交联甲阶酚醛相对应的炭均高于对纤维及其复合材料测得的值。因此，纤维的添加降低了酚醛热固性树脂的热阻。聚合物和纤维复合材料表现出复杂的降解，涉及不同的热分解过程。因此，对DTG曲线进行去卷积，并发现每个单独峰的现象动力学表达。重新计算了总的热分解曲线，并根据其对总重量损失的贡献加权了每个降解过程。在复合物中观察到与纤维素降解相对应的活化能增加，突出了包封纤维的树脂的保护作用。 （c）2007年Wiley期刊，bic。

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