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首页> 外文期刊>Journal of Applied Polymer Science >Investigation of the thermostability of poly(ethylene terephthalate)-hemp fiber composites: Extending natural fiber reinforcements to high-melting thermoplastics
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Investigation of the thermostability of poly(ethylene terephthalate)-hemp fiber composites: Extending natural fiber reinforcements to high-melting thermoplastics

机译：聚对苯二甲酸乙二酯-麻纤维复合材料的热稳定性研究：将天然纤维增强材料扩展至高熔点热塑性塑料

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摘要

The thermal stability of poly(ethylene terephthalate) reinforced with 1, 5, 10, 15, and 20% hemp fibers was investigated with the aim of extending the applications of biocomposites to high-melting thermoplastics. The material was injection-molded following compounding with a torque-based Rheomix at 240, 250, and 260 degrees C. A combination of thermogravimetric methods at 5, 10, and 20 degrees C/min, Liu and Yu's collecting temperature method, and Friedman's kinetic method were used for testing and analysis. A significant thermostability for all formulations was observed below 300 degrees C; this demonstrated their potential for successful melt processing. Moreover, two degradation steps were observed in the temperature ranges 313-390 and 390-490 degrees C. The associated apparent activation energies within the temperature ranges were determined as 150-262 and 182-242 kJ/mol, respectively. We found that the thermostability was significantly affected by the heating rates; however, the effect of the temperature of the mixing chamber was negligible. These findings suggest that the successful melt processing of high-melting thermoplastics reinforced with natural fibers is possible with limited fiber thermodegradation. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42500.
机译：为了扩展生物复合材料在高熔点热塑性塑料中的应用，研究了用1、5％，10％，15％和20％的大麻纤维增强的聚对苯二甲酸乙二醇酯的热稳定性。该材料在240、250和260摄氏度下与基于扭矩的Rheomix复合后进行注塑成型。以5、10和20摄氏度/分钟的热重法，Liu和Yu的收集温度法以及Friedman's的组合动力学方法用于测试和分析。在低于300摄氏度的温度下，所有制剂均具有明显的热稳定性;这证明了他们成功进行熔体加工的潜力。而且，在313-390和390-490℃的温度范围内观察到两个降解步骤。在该温度范围内的相关表观活化能分别确定为150-262和182-242kJ / mol。我们发现加热速率显着影响了热稳定性。然而，混合室温度的影响可以忽略不计。这些发现表明，通过有限的纤维热降解，可以成功地对天然纤维增强的高熔点热塑性塑料进行熔融加工。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42500。

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