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A new PvT device for the thermoplastics characterization in extreme thermal conditions

机译：一种新型PvT装置，可在极端温度条件下表征热塑性塑料

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In this work, we present an apparatus associated to a methodology that is able to determine simultaneously and according to temperature (up to 400°C) the specific volume (up to 200MPa), the thermal conductivity and the temperature function of the crystallization kinetics. The PvT-XT is a home-built device that is able to impose and quantify ID heat transfer through the radius of a sample. This apparatus controls the applied pressure on the sample while measuring its volume variations. The associated moving boundary model takes into account the temperature and crystallinity gradients. Specific volume is determined from direct measurement whereas inverse methods are used to estimate the thermal conductivity and the crystallization kinetics (with cooling rates up to 200K/min). Specific volume measurements are compared with literature results and exhibit a very good agreement. Thermal conductivity identified in the present paper is also very close to literatures values. Finally identification of kinetic function values is consistent with previous studies.
机译：在这项工作中，我们介绍了一种与方法相关的设备，该方法能够根据温度（最高400°C）同时确定比容（最高200MPa），导热系数和结晶动力学的温度函数，同时进行测定。 PvT-XT是一款家用设备，能够施加和量化通过样品半径传递的ID热。该设备控制样品上施加的压力，同时测量其体积变化。相关的移动边界模型考虑了温度和结晶度梯度。比容是通过直接测量确定的，而逆方法用于估计导热率和结晶动力学（冷却速率最高为200K / min）。将比容测量结果与文献结果进行比较，并显示出很好的一致性。本文确定的热导率也非常接近文献值。最终确定动力学功能值与先前的研究一致。

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