Environmental Engineering Reference
In-Depth Information
Fig. 7 Stress depending on
the deformation rate for a
non-Newtonian fluid n
=
1/5
4 Conclusions
In this work, the modeling and simulation of a biopolymer PLA processing in a
single screw extruder is performed. The development of biodegradable polymers is
an option to use renewable resources and to reduce waste. PLA can be used in many
applications and is proposed as a substitute for synthetic polymers.
The model is validated by comparing the Newtonian case with results from the
literature, this simple model captures the Newtonian and non-Newtonian behavior
shown in the flow curves of the shear stress as a function of the shear rate. The Power
Law model is versatile in the processing of materials because the temperature and
shear rate dependence of viscosity can be easily included. The results show that this
model is simple and easy to implement for analyzing a variety of alternatives to
improve this attractive sustainable process.
Acknowledgments This project is funded by the research projects 20100658 and SIP 20144085
SIP_IPN in Mexico.
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