Abstract To describe uncured rubber melt flow, a modified Phan–Thien–Tanner (PTT) model was proposed to characterize the rheological behavior and a viscoelastic one-dimensional flow theory was established in terms of incompressible fluid. The corresponding numerical method was constructed to determine the solution. Rotational rheological experiments were conducted to validate the proposed model. The influence of the parameters in the constitutive model was investigated by comparing the calculated and experimental viscosity to determine the most suitable parameters. The uncured rubber viscosity was 3–4 orders larger than that of plastic and did not have a visible Newtonian region. Compared with the Cross-Williams-Landel-Ferry (Cross-WLF) and original PTT models, the modified PTT model can describe the rheological characteristics in the entire shear-rate region if the parameters are set correctly.

中文翻译：

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未硫化橡胶熔体的剪切流变行为建模

摘要 为了描述未硫化橡胶熔体流动，提出了改进的 Phan-Thien-Tanner (PTT) 模型来表征流变行为，并建立了基于不可压缩流体的粘弹性一维流动理论。构造了相应的数值方法来确定解。进行了旋转流变实验以验证所提出的模型。通过比较计算粘度和实验粘度以确定最合适的参数来研究本构模型中参数的影响。未固化橡胶的粘度比塑料大 3-4 个数量级，并且没有可见的牛顿区域。与 Cross-Williams-Landel-Ferry (Cross-WLF) 和原始 PTT 模型相比，