Photon correlation spectroscopy of poly(ethyl methacrylate) near the glass transition

Autor:	J. R. Stevens, G. D. Patterson, C. P. Lindsey
Rok vydání:	1980
Předmět:	Materials science Polymers and Plastics Dynamic light scattering Relaxation (NMR) Materials Chemistry Analytical chemistry General Chemistry Atmospheric temperature range Condensed Matter Physics Methacrylate Glass transition
Zdroj:	Journal of Macromolecular Science, Part B. 18:641-648
ISSN:	1525-609X 0022-2348
Popis:	Poly(ethyl methacrylate) has been studied by photon correlation spectroscopy in the temperature range 70–150°C. The relaxation function for longitudinal density fluctuations is highly nonexpon-ential and changes shape dramatically as the sample is cooled. The results indicate that there are multiple relaxation processes which have different apparent activation energies. The average relaxation time changes by a decade with a 5°C change in temperature near Tg. The breadth of the distribution of relaxation times near the glass transition is at least eight decades.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::247ef045eb3c01402ded25ae751ce096 https://doi.org/10.1080/00222348008241851 Zobrazit plný text záznamu