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首页> 外文期刊>Journal of Applied Polymer Science >Thermokinetics study of degradation process of soybean-based polyurethane foams
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Thermokinetics study of degradation process of soybean-based polyurethane foams

机译：大豆聚氨酯泡沫降解过程的热动力学研究

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摘要

Polyurethane (PU) production with the use of soybean oil was greatly appreciated by researchers due to their low cost, easy availability, and nontoxic nature. The thermokinetics and degradation process of soybean oil-based PU (SPU) were measured by differential scanning calorimetry-thermogravimetry-Fourier transform infrared spectrum. Influence of various factors such as the NCO/OH molar ratio (1.5-2.0) and different heating rates on the thermodynamic properties and thermal stability during the degradation process were studied in detail. Moreover, the thermokinetics mechanism included activation energy, reaction rate, and kinetic parameters of the degradation process were evaluated using "AKTS-Thermokinetics" software. The reaction rate ranged from 0.0005 to 0.0025 at the first stage (60-150 degrees C), then changed to values between 0.00025 and 0.0015 at the second stage (250-350 degrees C) and between 0.00025 and 0.0020 at the third stage (400-550 degrees C). It was observed that the degradation progress included with three- or four-step degradation profiles. As the soybean oil content or NCO/OH molar ratio increase, the thermal stability of SPU increased. In addition, the activation energy and reaction rate increased with the increased soybean oil contents. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47357.
机译：研究人员由于它们的低成本，容易的可用性和无毒性质，研究人员非常赞赏聚氨酯（PU）生产。通过差示扫描量热法测量豆油基PU（SPU）的热动力学和降解过程通过差示扫描量热法测量 - 热重率 - 傅里叶变换红外光谱。详细研究了各种因素，例如NCO / OH摩尔比（1.5-2.0）和不同的加热速率的不同因素和不同的加热速率。详细研究了降解过程中的热力学性质和热稳定性。此外，使用“Akts-Thermokinetics”软件评估了热动力学机理，包括激活能量，反应速率和降解过程的动力学参数。在第一阶段（60-150℃）的反应速率范围为0.0005至0.0025，然后在第二阶段（250-350℃）和第三阶段的0.00025和0.0020之间的0.00025和0.0015的值（400 -550 c）。观察到，包括三阶段或四步劣化型材包括的降解进展。随着大豆油含量或NCO / OH摩尔比的增加，SPU的热稳定性增加。此外，活化能量和反应速率随大豆油含量增加而增加。 （c）2018 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47357。

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