[题名] 了解加工对全氟烷氧基( PFA )性质的影响

[作者] 卡桑德拉·娜塔莉·扎拉·托德

[机构]布拉德福德大学工程与信息学学院

[摘要] 为了更好地理解加工条件对三种不同转移模塑等级的PFA性能的影响，我们进行了研究。虽然有传闻表明，在加工温度下暴露于高剪切速率和停留时间可能会对聚合物产生不利影响，但这一领域缺乏公开信息。本文旨在更深入地了解材料在不同加工条件下的行为。使用定制的毛细管流变仪，在5-400s-1的范围内测量了各种温度下的流动特性。结果表明，这些材料具有剪切变稀的特性，原始等级在低剪切速率下表现出牛顿行为。我们还发现，填充有碳黑的PFA的粘度高于原始材料，尽管其熔体流动速率更高。

[关键词] 全氟烷氧基，转移成型，加工，氟聚合物

[Title] Understanding the Effects of Processing on the Properties of Perfluoroalkoxy (PFA)

[Author] Cassandra Natalie Zara TODD

[Organization] Faculty of Engineering and Informatics University of Bradford

[Abstract] A bespoke capillary rheometer was used to determine flow characteristics at various temperatures between 5-400s-1 . The materials were found to be shear thinning, with the virgin grades exhibiting Newtonian behaviour at low shear rates. The viscosity of the carbon black filled PFA was found to have a higher viscosity than the virgin materials, despite it having a higher Melt Flow Rate.

[Keywords] Perfluoroalkoxy, Transfer Moulding, Processing, Fluoropolymers