{"title":"最终变形的双网凝胶具有正能量弹性","authors":"Chika Imaoka, Tatsunari Masumi, Jian Ping Gong, Tsutomu Indei, Tasuku Nakajima","doi":"arxiv-2408.02523","DOIUrl":null,"url":null,"abstract":"The elasticity of rubbery polymer networks has been considered to be\nentropy-driven. On the other hand, studies on single polymer chain mechanics\nhave revealed that the elasticity of ultimately stretched polymer chains is\ndominated by the energetic contribution mainly originating from chemical bond\ndeformation. Here, we experimentally found that the elasticity of the\ndouble-network gel transits from the entropy-dominated one to the internal\nenergy-driven one with its uniaxial deformation through the thermodynamic\nanalysis. Based on this finding, we developed a simple mechanical model that\ntakes into account the energetic contribution and found that this model\napproximately reproduces the temperature dependence of the stress-strain curve\nof the double-network gel. This study demonstrates the importance of the\nchemical perspective in the mechanical analysis of highly deformed rubbery\npolymer networks.","PeriodicalId":501146,"journal":{"name":"arXiv - PHYS - Soft Condensed Matter","volume":"36 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ultimately deformed double-network gels possess positive energetic elasticity\",\"authors\":\"Chika Imaoka, Tatsunari Masumi, Jian Ping Gong, Tsutomu Indei, Tasuku Nakajima\",\"doi\":\"arxiv-2408.02523\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The elasticity of rubbery polymer networks has been considered to be\\nentropy-driven. On the other hand, studies on single polymer chain mechanics\\nhave revealed that the elasticity of ultimately stretched polymer chains is\\ndominated by the energetic contribution mainly originating from chemical bond\\ndeformation. Here, we experimentally found that the elasticity of the\\ndouble-network gel transits from the entropy-dominated one to the internal\\nenergy-driven one with its uniaxial deformation through the thermodynamic\\nanalysis. Based on this finding, we developed a simple mechanical model that\\ntakes into account the energetic contribution and found that this model\\napproximately reproduces the temperature dependence of the stress-strain curve\\nof the double-network gel. This study demonstrates the importance of the\\nchemical perspective in the mechanical analysis of highly deformed rubbery\\npolymer networks.\",\"PeriodicalId\":501146,\"journal\":{\"name\":\"arXiv - PHYS - Soft Condensed Matter\",\"volume\":\"36 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-08-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - Soft Condensed Matter\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2408.02523\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Soft Condensed Matter","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2408.02523","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The elasticity of rubbery polymer networks has been considered to be
entropy-driven. On the other hand, studies on single polymer chain mechanics
have revealed that the elasticity of ultimately stretched polymer chains is
dominated by the energetic contribution mainly originating from chemical bond
deformation. Here, we experimentally found that the elasticity of the
double-network gel transits from the entropy-dominated one to the internal
energy-driven one with its uniaxial deformation through the thermodynamic
analysis. Based on this finding, we developed a simple mechanical model that
takes into account the energetic contribution and found that this model
approximately reproduces the temperature dependence of the stress-strain curve
of the double-network gel. This study demonstrates the importance of the
chemical perspective in the mechanical analysis of highly deformed rubbery
polymer networks.