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首页> 外文期刊>Journal of Applied Polymer Science >TEMPERATURE DEPENDENCE OF VISCOSITY OF POLYURETHANE POLYOL SOLUTIONS - APPLICATION OF RHEOLOGICAL MODELS
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TEMPERATURE DEPENDENCE OF VISCOSITY OF POLYURETHANE POLYOL SOLUTIONS - APPLICATION OF RHEOLOGICAL MODELS

机译：聚氨酯多元醇溶液粘度的温度依赖性-流变模型的应用

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Polyurethane polyols were synthesized by reacting the diols with polyisocyanates. Viscosity of their 50% (w/w) solutions in various solvents has been determined at different temperatures by using Haake Roto Visco RV12 Rotational Viscometer. The temperature dependence of viscosity data was solved by Levenberg Marquardt's algorithm by using nonlinear regression models based on WLF, Vogel, and Arrhenius equations. The T-g values obtained from WLF and Vogel equation are comparable to each other and these equations can be satisfactorily used for the analysis of temperature dependence of viscosity data of oligomer solutions. The residuals are random and the absolute average percentage error in analyzing the viscosity data by these equations is minimum. The values of constants in WLF equation are found to be system dependent and adjustable parameters. The predicted In eta values obtained from WLF and Vogel equations fit well with the plots of experimental In eta values as a function of temperature. (C) 1996 John Wiley & Sons, Inc. [References: 22]
机译：通过使二醇与多异氰酸酯反应合成聚氨酯多元醇。使用Haake Roto Visco RV12旋转粘度计，已在不同温度下确定了它们在各种溶剂中的50％（w / w）溶液的粘度。使用基于WLF，Vogel和Arrhenius方程的非线性回归模型，通过Levenberg Marquardt算法解决了粘度数据的温度依赖性。从WLF和Vogel方程获得的T-g值彼此可比，并且这些方程式可以令人满意地用于分析低聚物溶液粘度数据的温度依赖性。残差是随机的，通过这些方程式分析粘度数据时的绝对平均百分比误差最小。发现WLF方程中的常数值取决于系统并且是可调整的参数。从WLF和Vogel方程获得的预测In eta值与实验In eta值随温度变化的曲线图非常吻合。 （C）1996 John Wiley＆Sons，Inc. [参考：22]

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