The key goal of this study was to compare the sorption kinetics properties of poly-tetrafluoroethylene (PTFE) processed either by spark plasma sintering (SPS-PTFE) or extrusion methods (Ext-PTFE). A gravimetric-sorption technique was used to obtain kinetic and equilibrium adsorption data at room temperature in several liquids (toluene, n-hexane, tetrahydrofuran and chloroform). Sorption kinetics was quantified using the Berens-Hopfenberg empirical model. The results are discussed in terms of liquid diffusion and polymer relaxation. An attempt was made to correlate the crystallization rate, apparent diffusion coefficient and sorption rate for the series of samples. Additionally, the effect of sorption kinetics on the structure and mechanical properties of PTFE samples was investigated. Swelling of SPS-PTFE reduces slightly the crystallite thickness, the Young's modulus and yield stress. In contrast, the crystalline phase is less impacted by swelling for Ext-PTFE samples for witch Young's modulus is increased under the combined effect of swelling and tensile stress.

这项研究的主要目标是比较通过火花等离子体烧结（SPS-PTFE）或挤出方法（Ext-PTFE）处理的聚四氟乙烯（PTFE）的吸附动力学特性。使用重量吸收技术获得室温下在几种液体（甲苯，正己烷，四氢呋喃和氯仿）中的动力学和平衡吸附数据。使用Berens-Hopfenberg经验模型对吸附动力学进行定量。根据液体扩散和聚合物松弛来讨论结果。试图关联一系列样品的结晶速率，表观扩散系数和吸附速率。此外，还研究了吸附动力学对PTFE样品的结构和力学性能的影响。SPS-PTFE的溶胀会稍微降低微晶厚度，杨氏模量和屈服应力。相反，Ext-PTFE样品的溶胀对结晶相的影响较小，因为在溶胀和拉伸应力的共同作用下，杨氏模量增加了。