Abstract
A new mean-field description of the solid to liquid glass (SLG) transition, that incorporates the existence of cooperative rearranging regions (CRRs), is presented. Based on the concept that the cooperative diffusion is a bimodal process with one component being Arrhenius, a sigmoidal shape of the SLG cohesion energy is determined. Incorporation of the new mean-field idea into the Sanchez-Lacombe theory, allows for the first time the description of the free energy in the glassy region. In this way a definition of the size and the temperature dependence of CRRs is succeeded. The outcome is confirmed by a cluster analysis on simulated poly(ethylene) matrix. Moreover, an agreement with the experiment is verified by fitting of the SLG-Equation of State (EoS) with experimental PVT data. Our study, provides parameters for the mean-field description of various polymers, like: poly(styrene), poly(methyl methacrylate), poly(acrylic acid), poly(ethyl methacrylate), poly(methacrylic acid), atactic poly(propylene) and poly(carbonate).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
