Estimation of crystallization temperatures in quenched polyethylene

Autor:	H. D. Keith, T. C. Loomis
Rok vydání:	1984
Předmět:	Quenching Materials science Numerical analysis General Engineering Nucleation Mineralogy Thermodynamics Crystal growth Polyethylene Thermal diffusivity law.invention chemistry.chemical_compound chemistry law Latent heat Crystallization
Zdroj:	Journal of Polymer Science: Polymer Physics Edition. 22:295-306
ISSN:	1542-9385 0098-1273
DOI:	10.1002/pol.1984.180220214
Popis:	A numerical method has been employed to calculate crystallization temperature as a function of position in slabs or films of polyethylene quenched to various temperatures. The method is iterative, and combines a recent theoretical fit to empirical data for rate of crystal growth as a function of temperature with a solution to the thermal diffusion equation which takes latent heat into account. Results apply strictly only to transcrystalline regions near external surfaces but also provide lower limits to crystallization temperatures throughout the interiors of samples where spherulites nucleate ahead of the general crystallization front. Emphasis is given to assessing the relative importance of various physical parameters in determining crystallization temperatures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3ff3dd28c75ba637f57c755da0bdea67 https://doi.org/10.1002/pol.1984.180220214 Zobrazit plný text záznamu Plný text