粘流温度（软化温度）(viscous flow temperature)Tf为高弹态与粘流态间的转变温度， 叫做粘流温度或软化温度。
高弹态开始向粘流态 转变的温度称为粘流温度(viscous flow temperature)，以T f 表示，其间 的形变突变区域称为粘弹态转变区。分子量越大，T f 越高。
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考察了其粘均相对分子质量、质量分数、温度及流态对减阻效率、抗剪切稳定性的影响；
The effects of PLMA′s relative molecular mass, content, temperature and flow state on the drag reduction effectiveness and the shear stability were discussed.
由于其表观粘流活化能较大，故熔体特性受温度影响较大。
Its apparent viscous flow activation energy is higher so the influence of temperature on characteristics of melt is stronger.
因此，可以根据流态特征来估计该原油的拐点温度，为选择合适的降粘方法和降粘深度提供了技术指导。
So flow pattern character can be used to estimate the flex point temperature of the crude oil, which will help for selecting the available viscosity reducing method and the viscosity reduction depth.
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