Three-dimensional viscoelastic simulation of the effect of wall slip on encapsulation in the coextrusion process
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Hesheng Liu
,
Xiaozhen Deng
Abstract
A three-dimensional viscoelastic numerical simulation was developed for a two-layer coextrusion through a rectangular channel by using the finite element method. The Phan-Thien and Tanner model was considered as viscoelastic constitutive equations. The generalized Navier’s law was adopted to found the slip boundary condition. The numerical results of the effects of the wall slip coefficient and the flow rate on the interface profile and the degree of encapsulation were compared with the experimental results of previous researchers. It was found that the interfacial offset and the degree of encapsulation increased with the increase of the wall slip coefficient and the flow rate, and the growing rate was large when the wall slip coefficient was between 106 and 108. We were able to control the interface shape and the degree of encapsulation at the die exit by varying the wall slip coefficient and the magnitude of the melt flow rate.
This work was supported by the National Natural Science Foundation of China (grant no. 51163011) and Specialized Research Fund for the Doctoral Program of Higher Education (no. 20093601110001).
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Artikel in diesem Heft
- Masthead
- Masthead
- Original articles
- Degradation of epoxidized natural rubber compatibilized linear low density polyethylene/ soya powder blends: the effect of natural weathering
- Effect of compatibilizing agents on the physical properties of iPP/HDPE organoclay blends
- Thermal and mechanical properties of ultrahigh molecular weight polyethylene/high-density polyethylene/polyethylene glycol blends
- Effect of MMT concentrations as reinforcement on the properties of recycled PET/HDPE nanocomposites
- Three-dimensional viscoelastic simulation of the effect of wall slip on encapsulation in the coextrusion process
- Studies on thin films of PVC-PMMA blend polymer electrolytes
- Morphological study of PVDF/PMMA/TiO2 blend films prepared by melt casting process
- Effects of calcium stearate and metal hydroxide additions on the irradiated LDPE/EVA compound properties
- Preparation of poly(sebacic anhydride) and polylactic acid pills used as drug carrier for levofloxacin controlled release
- Gray optimization of process parameters of surface modification of coconut sheath reinforced polymer composites
