The effect of polyolefin extensional rheology on non-isothermal film blowing process stability

被引：19
作者：
Kolarik, Roman [1 ,2 ]
Zatloukal, Martin [1 ,2 ]
Martyn, Mike [3 ]
机构：
[1] Tomas Bata Univ Zlin, Fac Technol, Ctr Polymer, Zlin 76272, Czech Republic
[2] Tomas Bata Univ Zlin, Univ Inst, Ctr Polymer Syst, Zlin 76001, Czech Republic
[3] Univ Bradford, Sch Engn Design & Technol, IRC Polymer Sci & Technol, Bradford BD7 1DP, W Yorkshire, England
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2013年 / 56卷 / 1-2期
关键词：
Non-isothermal flow; Non-Newtonian fluid; Polymer processing; Extrusion; Films; Flow stability; UNIVERSAL TESTING PLATFORM; LOW-DENSITY POLYETHYLENE; NON-NEWTONIAN FLUIDS; GROSS MELT FRACTURE; TUBULAR FILM; VARIATIONAL-PRINCIPLES; MOLECULAR-STRUCTURE; POLYMER MELTS; ELONGATIONAL VISCOSITY; BUBBLE INSTABILITIES;
D O I：
10.1016/j.ijheatmasstransfer.2012.09.025
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The effect of polyolefin extensional rheology on the non-isothermal film blowing process stability and minimum achievable final film thickness has been investigated experimentally as well as theoretically utilizing variational principle model for the film blowing operation. It has been revealed experimentally as well as theoretically that the relationship between film blowing stability window size (and/or minimum achievable final film thickness) and the extensional strain hardening is non-monotonic in character for a given range of melt strengths, i.e. there is existence of the optimal values for both variables to reach maximum stability window size and/or the smallest minimum achievable final film thickness. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：694 / 708
页数：15
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