[题名] 聚四氟乙烯与全氟化四氟乙烯共聚物二元共混物的结晶

[作者] Masahiro ENDO,y Aki OHNISHI, Shoichi KUTSUMIZU,Tetsuo SHIMIZU,and Shinichi YANO

[摘要] 我们使用差示扫描量热法（DSC）和X射线衍射法研究了聚四氟乙烯（PTFE）与聚（四氟乙烯-共-10摩尔％六氟丙烯）（FEP）和聚（四氟乙烯-共-2摩尔％全氟丙基乙烯基醚）（PFA）两种二元共混物的混溶性和结晶行为。在FEP/PTFE共混物中，FEP和PTFE组分分别结晶形成各自的晶体，而在PFA/PTFE共混物中，PFA和PTFE组分共同结晶形成包含PFA和PTFE四氟乙烯段的PTFE型晶体。我们根据化学结构、分子量、结晶速率、共混方法（两种组分如何混合）和共聚单体浓度，讨论了两种共混物的结晶行为。

[关键词] 聚四氟乙烯、聚（四氟乙烯共10mol%六氟丙烯）、聚（四氟乙烯共2mol%全氟丙基氟乙烯醚）、混合物、结晶

[Title] Crystallization in Binary Blends of Polytetrafluoroethylene with Perfluorinated Tetrafluoroethylene Copolymer

[Author] Masahiro ENDO,y Aki OHNISHI, Shoichi KUTSUMIZU,Tetsuo SHIMIZU,and Shinichi YANO

[Abstract] Miscibility and crystallization were studied for two binary blends of polytetrafluoroethylene (PTFE) with poly(tetrafluoroethylene-co-10 mol % hexafluoropropylene) (FEP) and poly(tetrafluoroethylene-co-2 mol % per-fluoropropylvinyl ether) (PFA), using DSC and X-Ray diffractometry. In FEP/PTFE blends, FEP and PTFE components were separately crystallized to form their own crystallites, while in PFA/PTFE blends, PFA and PTFE components were cocrystallized to form PTFE-type crystallites incorporating tetrafluoroethylene segments of PFA and PTFE.The crystallization behavior in both blends is discussed in terms of chemical structure, molecular weight, crystallizationrate, blending method (how the two components are blended) and comonomer concentration.

[Keywords] Polytetrafluoroethylene、 Poly(tetrafluoroethylene-co-10 mol % hexafluoropropylene)、 Poly(tetrafluoroethylene-co-2 mol % perfluoropropylvinyl ether、Blends 、 Crystallization