熔体的相对分子质量越高，拉伸速率对熔体的拉伸粘度影响越大。
With increasing the molecular weight of PTT melt, the extensional strain rate affected significantly the extensional viscosity of melt.
熔体的相对分子质量越高，拉伸速率对熔体的拉伸粘度影响越大。
With increasing the molecular weight of PTT melt, the extensional strain rate affected significantly the extensional viscosity of melt.
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