Victor Kislyuk, Vladyslav Shyvaniuk, Sergiy Kotrechko
{"title":"预载松弛后乙烯醋酸乙烯共聚物薄膜的蠕变寿命","authors":"Victor Kislyuk, Vladyslav Shyvaniuk, Sergiy Kotrechko","doi":"10.1007/s00289-024-05567-5","DOIUrl":null,"url":null,"abstract":"<div><p>The influence of the mechanical load and ultraviolet radiation on the lifetime of viscous and elastic ethylene vinyl acetate co-polymer (EVA) films under the various loads are studied to establish its principles and to develop the basic concepts regarding its physical nature. The dumbbell samples of the cured (annealed at 135 °C) EVA films (c-EVA) are pre-loaded and kept pre-strained till the complete load relaxation to reduce a viscous component prior to the creep under the load added to the relaxed value of the external force. The creep lifetime logarithm vs. added load dependencies measured at 21 °C with and without simultaneous ultraviolet irradiation with 365 nm wavelength light (from the EVA absorption tail) contain two linear segments each. The linear fragments are approximated with Zhurkov and Kauzmann–Eyring (KE) phenomenological models, which allows one to derive the quantitative parameters such as activation energy (found to be by several times lower than the dissociation energy of C – C bond), structural factor and force concentration factor as well as to estimate the density of the aligned polymer chains (per unit area) and the alignment level defined as the ratio of the polymer chain density to its maximal value (estimated to be <span>\\(4\\cdot {10}^{18} {\\text{m}}^{-2})\\)</span>. The specific surface energy of the order of 0.01 J m<sup>−2</sup> calculated from the KE approximation data is in a proper consent with Griffith’s criterion for the crack propagation.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":"82 5","pages":"1499 - 1530"},"PeriodicalIF":3.1000,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Creep lifetime of ethylene vinyl acetate co-polymer film after pre-load relaxation\",\"authors\":\"Victor Kislyuk, Vladyslav Shyvaniuk, Sergiy Kotrechko\",\"doi\":\"10.1007/s00289-024-05567-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The influence of the mechanical load and ultraviolet radiation on the lifetime of viscous and elastic ethylene vinyl acetate co-polymer (EVA) films under the various loads are studied to establish its principles and to develop the basic concepts regarding its physical nature. The dumbbell samples of the cured (annealed at 135 °C) EVA films (c-EVA) are pre-loaded and kept pre-strained till the complete load relaxation to reduce a viscous component prior to the creep under the load added to the relaxed value of the external force. The creep lifetime logarithm vs. added load dependencies measured at 21 °C with and without simultaneous ultraviolet irradiation with 365 nm wavelength light (from the EVA absorption tail) contain two linear segments each. The linear fragments are approximated with Zhurkov and Kauzmann–Eyring (KE) phenomenological models, which allows one to derive the quantitative parameters such as activation energy (found to be by several times lower than the dissociation energy of C – C bond), structural factor and force concentration factor as well as to estimate the density of the aligned polymer chains (per unit area) and the alignment level defined as the ratio of the polymer chain density to its maximal value (estimated to be <span>\\\\(4\\\\cdot {10}^{18} {\\\\text{m}}^{-2})\\\\)</span>. The specific surface energy of the order of 0.01 J m<sup>−2</sup> calculated from the KE approximation data is in a proper consent with Griffith’s criterion for the crack propagation.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":737,\"journal\":{\"name\":\"Polymer Bulletin\",\"volume\":\"82 5\",\"pages\":\"1499 - 1530\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-11-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polymer Bulletin\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00289-024-05567-5\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Bulletin","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s00289-024-05567-5","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Creep lifetime of ethylene vinyl acetate co-polymer film after pre-load relaxation
The influence of the mechanical load and ultraviolet radiation on the lifetime of viscous and elastic ethylene vinyl acetate co-polymer (EVA) films under the various loads are studied to establish its principles and to develop the basic concepts regarding its physical nature. The dumbbell samples of the cured (annealed at 135 °C) EVA films (c-EVA) are pre-loaded and kept pre-strained till the complete load relaxation to reduce a viscous component prior to the creep under the load added to the relaxed value of the external force. The creep lifetime logarithm vs. added load dependencies measured at 21 °C with and without simultaneous ultraviolet irradiation with 365 nm wavelength light (from the EVA absorption tail) contain two linear segments each. The linear fragments are approximated with Zhurkov and Kauzmann–Eyring (KE) phenomenological models, which allows one to derive the quantitative parameters such as activation energy (found to be by several times lower than the dissociation energy of C – C bond), structural factor and force concentration factor as well as to estimate the density of the aligned polymer chains (per unit area) and the alignment level defined as the ratio of the polymer chain density to its maximal value (estimated to be \(4\cdot {10}^{18} {\text{m}}^{-2})\). The specific surface energy of the order of 0.01 J m−2 calculated from the KE approximation data is in a proper consent with Griffith’s criterion for the crack propagation.
期刊介绍：
"Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad.
"Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."
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