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首页> 外文期刊>International Polymer Processing: The Journal of the Polymer Processing Society >Rheology and Processing of Tetrafluoroethylene/ Hexafluoropropylene Copolymers
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Rheology and Processing of Tetrafluoroethylene/ Hexafluoropropylene Copolymers

机译：四氟乙烯/六氟丙烯共聚物的流变学和加工

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摘要

The rheology and processing of tetrafluoroethylene/hexafluor-opropylene (TFE/HFP) copolymers and TFE/HFP/per-fluor-o(alkyl vinyl ether) (TFE/HFP/PAVE) terpolymers, also known as FEP polymers, are reviewed in this paper. Dynamic linear viscoelasticity and other fundamental rheological properties such as the critical molecular weight for the onset of entanglements, M_a the zero-shear viscosity versus molecular weight relationship, dependence of rheology on thermal history and aspects of shear-induced crystallization are presented. The melt fracture and wall slip behavior of FEP resins is also discussed. Finally, possible processing aids that can be used in the extrusion of FEP resins in order to postpone melt fracture phenomena to higher flow rates are also discussed thoroughly:
机译：本文综述了四氟乙烯/六氟丙烯（TFE / HFP）共聚物和TFE / HFP /全氟邻（烷基乙烯基醚）（TFE / HFP / PAVE）三元共聚物（也称为FEP聚合物）的流变学和加工纸。提出了动态线性粘弹性和其他基本流变特性，例如缠结开始的临界分子量，M_a零剪切粘度与分子量的关系，流变学对热历史的依赖性以及剪切诱导结晶的方面。还讨论了FEP树脂的熔体破裂和壁滑行为。最后，还彻底讨论了可用于挤出FEP树脂以将熔体破裂现象推迟到更高流速的可能的加工助剂：

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