Citation: Yu Ma, Xiao-hong Zhang, Wen-bing Hu. EXTENSIONAL FLOW OF BULK POLYMERS STUDIED BY DYNAMIC MONTE CARLO SIMULATIONS[J]. Chinese Journal of Polymer Science, ;2013, 31(11): 1463-1469. doi: 10.1007/s10118-013-1337-1 shu

EXTENSIONAL FLOW OF BULK POLYMERS STUDIED BY DYNAMIC MONTE CARLO SIMULATIONS

Yu Ma ^1,2,3 ,
Xiao-hong Zhang ⁴ ,
Wen-bing Hu ⁵

1.
1. Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
2.
2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 200051, China
3.
4.
Anhui Tong Feng Electronics Corporation, Tongling 244000, China
5.
Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

Received Date: 23 April 2013
Revised Date: 18 June 2013

Fund Project: This work is financially supported by the National Natural Science Foundation of China (Nos. 20825415 and 21274061) and the National Basic Research Program of China (No. 2011CB606100).

Dynamic Monte Carlo simulations of bulk lattice polymers driven through planar geometries with sequentially converging, parallel and diverging spaces between two neutrally repulsive solid plates are reported. The spatial profiles of polymer velocity and deformation along the course of such a laminar extensional flow have been carefully analyzed. The results appear consistent with experimental observations in literature. In the entrance and exit regions, a linear dependence of chain extension upon the excess velocity has been observed. Moreover, an annexed shear flow and a molecular-dispersion effect are found. The results demonstrate a useful strategy of this approach to study polymer flows and bring new insights into the non-Newtonian-fluid behaviors of bulk polymers in capillary rheometers and micro-fluidic devices.
- Polymer deformation,
- Extensional flow,
- Monte Carlo simulations
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