Poly(vinylidene fluoride-chlorotrifluoroethylene) (P(VDF-CTFE)) membranes were prepared by drop-casting with tetrahydrofuran (THF), and were then radiated by a low dose of gamma radiation without any other reagents. The apparent colour of the freshly prepared film was a semi-transparent white, which gradually darkened and finally turned black after 10.2 kGy gamma radiation. Meanwhile, the yield and breaking strength of the membrane both improved. X-Ray diffraction (XRD) spectra showed that the structure of the microcrystal of the irradiated P(VDF-CTFE)-THF membrane was not changed. FT-IR analysis showed that the structure of the newly formed double bonds was dominated by –CF₂–CF=CH–CF₂–, which was formed by both dehydrofluorination and dehydrochlorination. This structure was further confirmed by ¹H NMR spectra. The intermediates, such a radical-containing double bonds (–(CF=CH)_n–C^•F–) formed in this process were traced by electron paramagnetic resonance (EPR) spectroscopy. The thermal and mechanical properties were studied by gel permeation chromatography (GPC), thermogravimetric analysis (TGA), stress–strain and dynamic mechanical analysis (DMA), and all the changes of microstructure and optimization of apparent properties were not found in the corresponding membrane prepared by a solution-cast method with ethyl acetate (EtOAc). Therefore, this paper briefly analyses the probable mechanism of using low dose of gamma radiation to improve the mechanical properties of the P(VDF-CTFE) film prepared with THF.

聚（偏二氟乙烯-氯三氟乙烯）（P（VDF-CTFE））膜是通过用四氢呋喃（THF）滴铸法制备的，然后在不使用任何其他试剂的情况下通过低剂量的γ辐射进行辐射。新制备的膜的表观颜色为半透明的白色，在10.2 kGy的伽马射线辐照后，该膜逐渐变暗并最终变为黑色。同时，膜的产率和断裂强度均得到改善。X射线衍射（XRD）光谱表明，经辐照的P（VDF-CTFE）-THF膜的微晶结构没有改变。FT-IR分析表明，新形成的双键的结构主要由–CF ₂ –CF = CH–CF _2决定。–由脱氟化氢和脱氯化氢形成。通过¹ H NMR光谱进一步证实了该结构。中间体，例如含自由基的双键（–（CF = CH）_n –C ^•在此过程中形成的F–）通过电子顺磁共振（EPR）光谱进行了追踪。通过凝胶渗透色谱（GPC），热重分析（TGA），应力应变和动态力学分析（DMA）研究了热和机械性能，并且在相应的膜中未发现所有微观结构的变化和表观性能的优化。通过溶液浇铸法用乙酸乙酯（EtOAc）制备。因此，本文简要分析了使用低剂量伽马射线提高THF制备的P（VDF-CTFE）膜的机械性能的可能机理。