Gamma irradiation-induced structural evolution and mechanical response of P(VDF-CTFE) copolymer

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2024-12-24 DOI:10.1016/j.radphyschem.2024.112486

Zhixiao Lian , Xiayan Cao , Yuying Li , Yang Yang , Xueyan Zhao , Shichun Li , Chunhua Zhu , Yu Liu

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Abstract

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.

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γ辐照诱导P（VDF-CTFE）共聚物的结构演化和力学响应

本研究探讨了γ射线对聚偏氟乙烯-三氟氯乙烯共聚物（P(VDF-CTFE)）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，导致其力学性能发生显著变化。红外光谱（FT-IR）和核磁共振（NMR）分析证实了辐照后的脱卤和氧化反应，从而引发了结构变化。高剂量促进交联，在乙酸乙酯中凝胶化，伴随着由于降解而导致的分子量降低。拉伸试验显示，辐照后强度增加，断裂应变降低，这是由于稳定的交联网络抑制结晶并影响聚合物取向，SAXS、DSC和TGA观察发现，辐照后热稳定性下降。我们的发现突出了γ射线引起的结构变化与P（VDF-CTFE）宏观力学性能之间的相互作用，为γ射线改性聚合物提供了新的见解，并为材料科学的应用提供了信息。

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.