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首页> 外文会议>International Conference on Deformation, Yield and Fracture of Polymers; 20000410-20040413; Cambridge; GB >EXPERIMENTAL AND THEORETICAL STUDY OF THE UNI-AXIAL DEFORMATION OF AMORPHOUS POLY(ETHYLENE TEREPHTHALATE) ABOVE THE GLASS TRANSITION TEMPERATURE
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EXPERIMENTAL AND THEORETICAL STUDY OF THE UNI-AXIAL DEFORMATION OF AMORPHOUS POLY(ETHYLENE TEREPHTHALATE) ABOVE THE GLASS TRANSITION TEMPERATURE

机译：玻璃转变温度以上非晶态聚对苯二甲酸乙二酯单轴变形的实验和理论研究

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As long as PET remains in its rubber state, far enough from the alpha transition, its uni-axial deformation can be modelled using an Edwards and Vilgis potential. The material can be represented by a network constituted of chains of finite extensibility constrained by entanglements having a finite degree of freedom (slip) and of additional permanent nodes. This latter population could valuably be associated with tied nodes induced by crystallization but this direct correlation is still difficult. In case where the material is used in conditions closer to the alpha transition (high strain rate or low temperature), this model should be improved. Another investigation should be the reproduction of the effect of strain rate and temperature to tend to a more general formulation. However, at this stage, the model makes it possible to envisage a better description of stretch-blow moulding of PET.
机译：只要PET保持其橡胶状态，距离α过渡足够远，就可以使用Edwards和Vilgis势来模拟其单轴变形。该材料可以用由有限可扩展性链组成的网络表示，该链由具有有限自由度（滑移）的缠结和附加的永久节点约束。后一个种群可能与结晶诱导的束缚结点有联系，但这种直接相关仍然很困难。如果在接近α转变的条件下使用材料（高应变速率或低温），则应改进此模型。另一个研究应该是应变率和温度效应的再现，以趋于更一般的公式。但是，在此阶段，该模型可以设想对PET的拉伸吹塑成型进行更好的描述。

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