This study explores the impact of γ-rays on the aggregation structure and mechanical properties of poly(vinylidene fluoride-chlorotrifluoroethylene) (P(VDF-CTFE)) copolymer. γ-Irradiation altered the polymer's aggregation structure, leading to notable changes in mechanical performance. FT-IR and NMR analysis confirmed dehalogenation and oxidation reactions upon irradiation, which triggered structural alterations. High doses promoted crosslinking, evidenced by gelation in ethyl acetate, accompanied by molecular weight reduction due to degradation. Tensile tests revealed increased strength and decreased fracture strain with irradiation, attributed to a stable crosslinking network inhibiting crystallization and influencing polymer orientation, as observed by SAXS, DSC, and TGA showed decreased thermal stability post-irradiation. Our findings highlight the interaction between the structural changes caused by γ-rays and the macroscopic mechanical properties of P(VDF-CTFE), provide insights into the modification of polymers by γ-rays, and provide information for the application of materials science.

中文翻译：

---

P（VDF-CTFE） 共聚物的伽马辐照诱导的结构演变和机械响应


本研究探讨了γ射线对聚偏二氟乙烯-三氟氯乙烯 （P（VDF-CTFE）） 共聚物聚集结构和力学性能的影响。γ辐照改变了聚合物的聚集结构，导致机械性能发生显着变化。FT-IR 和 NMR 分析证实了辐照后发生脱卤和氧化反应，从而引发了结构改变。高剂量促进交联，乙酸乙酯中的凝胶化证明了这一点，伴随着降解导致的分子量降低。拉伸测试显示，照射强度增加，断裂应变降低，这归因于稳定的交联网络抑制结晶并影响聚合物取向，如 SAXS 、 DSC 和 TGA 观察到的那样，照射后热稳定性降低。我们的研究结果突出了γ射线引起的结构变化与 P（VDF-CTFE） 的宏观力学性能之间的相互作用，为γ射线对聚合物的改性提供了见解，并为材料科学的应用提供了信息。