{"title":"材料中普遍合作松弛和扩散的预测与验证","authors":"K. L. Ngai","doi":"10.5254/rct.24.00023","DOIUrl":null,"url":null,"abstract":"\n Since its inception in 1979 the Coupling Model has predictions on the dynamic properties of relaxation and diffusion that should be universal in materials with many-body interactions. The verifications of this bold prediction require the studies of many different relaxation and diffusion processes in diverse kinds of material. These tasks performed over the past four decades have culminated in the overwhelming confirmation of the predictions as reported in the extensive review by the author published in Prog. Mater. Sci., 139, 101130 (2023). A large variety of relaxation and diffusion processes in widely different classes of materials are shown to have the predicted universal properties. In particular for polymers, the local segmental relaxation responsible for glass transition conforms to the universal properties. However, not known is whether diffusion of the entangled chains in high molecular weight polymers also follows the same or not. In this paper, published data of diffusion of entangled polymer chains from experiments and simulations are reexamined and reevaluated to show indeed that they are in conformity with the universal properties. The same conclusion holds also for diffusion and rheology of entangled cyclic polymers. This paper is written as a tribute to C. Michael Roland for his scientific collaborations and camaraderie with the author over many years.","PeriodicalId":21349,"journal":{"name":"Rubber Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Predictions And Verifications Of Universal Cooperative Relaxation And Diffusion In Materials\",\"authors\":\"K. L. Ngai\",\"doi\":\"10.5254/rct.24.00023\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n Since its inception in 1979 the Coupling Model has predictions on the dynamic properties of relaxation and diffusion that should be universal in materials with many-body interactions. The verifications of this bold prediction require the studies of many different relaxation and diffusion processes in diverse kinds of material. These tasks performed over the past four decades have culminated in the overwhelming confirmation of the predictions as reported in the extensive review by the author published in Prog. Mater. Sci., 139, 101130 (2023). A large variety of relaxation and diffusion processes in widely different classes of materials are shown to have the predicted universal properties. In particular for polymers, the local segmental relaxation responsible for glass transition conforms to the universal properties. However, not known is whether diffusion of the entangled chains in high molecular weight polymers also follows the same or not. In this paper, published data of diffusion of entangled polymer chains from experiments and simulations are reexamined and reevaluated to show indeed that they are in conformity with the universal properties. The same conclusion holds also for diffusion and rheology of entangled cyclic polymers. This paper is written as a tribute to C. Michael Roland for his scientific collaborations and camaraderie with the author over many years.\",\"PeriodicalId\":21349,\"journal\":{\"name\":\"Rubber Chemistry and Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2024-07-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Rubber Chemistry and Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.5254/rct.24.00023\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rubber Chemistry and Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.5254/rct.24.00023","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
摘要
自 1979 年创立以来,耦合模型预测了具有多体相互作用的材料中普遍存在的弛豫和扩散动态特性。要验证这一大胆的预测,需要对各种材料中许多不同的弛豫和扩散过程进行研究。在过去的四十年中,这些研究工作最终证实了这一预测,作者在《Prog.Mater.139, 101130 (2023)。大量不同类别材料中的弛豫和扩散过程都被证明具有预测的普遍特性。特别是聚合物,玻璃化转变的局部分段松弛符合普遍特性。然而,高分子量聚合物中纠缠链的扩散是否也遵循同样的规律,这一点尚不清楚。本文对已发表的实验和模拟纠缠聚合物链的扩散数据进行了重新审查和评估,结果表明这些数据确实符合普遍特性。同样的结论也适用于缠结环状聚合物的扩散和流变学。本文是为了向迈克尔-罗兰(C. Michael Roland)致敬,感谢他多年来与作者的科学合作和友情。
The Predictions And Verifications Of Universal Cooperative Relaxation And Diffusion In Materials
Since its inception in 1979 the Coupling Model has predictions on the dynamic properties of relaxation and diffusion that should be universal in materials with many-body interactions. The verifications of this bold prediction require the studies of many different relaxation and diffusion processes in diverse kinds of material. These tasks performed over the past four decades have culminated in the overwhelming confirmation of the predictions as reported in the extensive review by the author published in Prog. Mater. Sci., 139, 101130 (2023). A large variety of relaxation and diffusion processes in widely different classes of materials are shown to have the predicted universal properties. In particular for polymers, the local segmental relaxation responsible for glass transition conforms to the universal properties. However, not known is whether diffusion of the entangled chains in high molecular weight polymers also follows the same or not. In this paper, published data of diffusion of entangled polymer chains from experiments and simulations are reexamined and reevaluated to show indeed that they are in conformity with the universal properties. The same conclusion holds also for diffusion and rheology of entangled cyclic polymers. This paper is written as a tribute to C. Michael Roland for his scientific collaborations and camaraderie with the author over many years.
期刊介绍:
The scope of RC&T covers:
-Chemistry and Properties-
Mechanics-
Materials Science-
Nanocomposites-
Biotechnology-
Rubber Recycling-
Green Technology-
Characterization and Simulation.
Published continuously since 1928, the journal provides the deepest archive of published research in the field. Rubber Chemistry & Technology is read by scientists and engineers in academia, industry and government.