@article { ISI:000329101700009,
	title = {Nonisothermal analysis of extrusion film casting process using molecular constitutive equations},
	journal = {Rheologica Acta},
	volume = {53},
	number = {1},
	year = {2014},
	month = {JAN},
	pages = {85-101},
	publisher = {SPRINGER},
	address = {233 SPRING ST, NEW YORK, NY 10013 USA},
	abstract = {<p>Extrusion film casting (EFC) is a commercially important process that is used to produce several thousand tons of polymer films and coatings. In a recent work, we demonstrated the influence of polymer chain architecture on the extent of necking in an isothermal film casting operation (Pol et al., J Rheol 57:559-583, 2013). In the present research, we have explored experimentally and theoretically the effects of long-chain branching on the extent of necking during nonisothermal film casting conditions. Polyethylenes of linear and long-chain branched architectures were used for experimental studies. The EFC process was analyzed using the 1-D flow model of Silagy et al. (Polym Eng Sci 36:2614-2625, 1996) in which the energy equation was introduced to model nonisothermal effects, and two multimode constitutive equations, namely the {\textquoteleft}{\textquoteleft}extended pom-pom{\textquoteright}{\textquoteright} (XPP, for long-chain branched polymer melts) equation and the {\textquoteleft}{\textquoteleft}Rolie-Poly stretch version{\textquoteright}{\textquoteright} (RP-S, for linear polymer melts) equation, were incorporated to account for the effects of polymer chain architecture. We show that the model does a better job of capturing the qualitative features of the experimental data, thereby elucidating the role of chain architecture and nonisothermal conditions on the extent of necking.</p>},
	keywords = {Branched, Extrusion, Film, Linear, Necking, Nonisothermal, Polyethylene},
	issn = {0035-4511},
	doi = {10.1007/s00397-013-0739-x},
	author = {Pol, Harshawardhan and Banik, Sourya and Azad, Lal Busher and Thete, Sumeet Suresh and Doshi, Pankaj and Lele, Ashish K.}
}
