The New Jersey Institute of Technology's
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Title:	Viscoelastic properties of polymer melts
Author:	Lee, Wu-Shiong
View Online:	njit-etd1970-024 (x, 118 pages ~ 12.8 MB pdf)
Department:	Department of Chemical Engineering and Chemistry
Degree:	Master of Science
Program:	Chemical Engineering
Document Type:	Thesis
Advisory Committee:	Griskey, Richard G. (Committee chair)
Date:	1970-06
Keywords:	Polymers and polymerization
Availability:	Unrestricted
Abstract:	Thirteen samples of molten polymers were used to test Spriggs and Careau Models. Two empirical equations, one for apparent viscosity and the other which is new, for primary normal stress difference, were checked with these samples also. In order to test the models, material functions were sought for some specific flow patterns under which the experimental data were collected, and then these functions were compared with data. Careau Model was found to be better than Spriggs Model in representing molten polymer properties but still yield large deviations. Two empirical equations fitted data quite well and were expected to be useful in some applications. A considerable amount of molten polymer data was added to the open literature. Some ways of modifying Careau Model to describe polymer melts better were recommended.