{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T22:19:21Z","timestamp":1778624361973,"version":"3.51.4"},"reference-count":39,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2023,3,3]],"date-time":"2023-03-03T00:00:00Z","timestamp":1677801600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China","award":["52277139"],"award-info":[{"award-number":["52277139"]}]},{"name":"National Natural Science Foundation of China","award":["51907034"],"award-info":[{"award-number":["51907034"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>In this study, the quantum chemical method was used to investigate the microscopic characteristics of \u03b1-poly viny difluoride (PVDF) molecules under the influence of an electric field, and the impact of mechanical stress and electric field polarization on the insulation performance of PVDF was analyzed through the material\u2019s structural and space charge characteristics. The findings reveal that long-term polarization of an electric field leads to a gradual decline in stability and a reduction in the energy gap of the front orbital, resulting in the improved conductivity of PVDF molecules and a change in the reactive active site of the molecular chain. When the energy gap reaches a certain value, a chemical bond fracture occurs, with the C-H and C-F bonds at the ends of the backbone breaking first to form free radicals. This process is triggered by an electric field of 8.7414 \u00d7 109 V\/m, which leads to the emergence of a virtual frequency in the infrared spectrogram and the eventual breakdown of the insulation material. These results are of great significance in understanding the aging mechanism of electric branches in PVDF cable insulation and optimizing the modification of PVDF insulation materials.<\/jats:p>","DOI":"10.3390\/polym15051286","type":"journal-article","created":{"date-parts":[[2023,3,6]],"date-time":"2023-03-06T01:35:30Z","timestamp":1678066530000},"page":"1286","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Microscopic Mechanism of Electrical Aging of PVDF Cable Insulation Material"],"prefix":"10.3390","volume":"15","author":[{"given":"Zhiyi","family":"Pang","sequence":"first","affiliation":[{"name":"Faculty of Intelligent Manufacturing, Nanning University, Nanning 530200, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5557-1773","authenticated-orcid":false,"given":"Yi","family":"Li","sequence":"additional","affiliation":[{"name":"School of Mechanical and Electrical Engineering, Liuzhou Vocational & Technical College, Liuzhou 545000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7660-7293","authenticated-orcid":false,"given":"Hanbo","family":"Zheng","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering, Guangxi University, Nanning 530004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rui","family":"Qin","sequence":"additional","affiliation":[{"name":"Liuzhou Power Supply Bureau of Guangxi Power Grid Co., Ltd., Liuzhou 545000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,3,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"075013","DOI":"10.1088\/1361-665X\/abff15","article-title":"Preparation and optimization of PVDF thin films for miniaturized sensor and actuator applications","volume":"30","author":"Sarkar","year":"2021","journal-title":"Smart Mater. 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