A Simple-to-Implement Simulator for the Reactive Extrusion of Poly(Lactic Acid) in a Corotating Uniform Twin-Screw Extruder
Por:
Vargas R.O., López-Aguilar J.E., Martínez-Suástegui L.A., López-Serrano F.
Publicada:
1 ene 2015
Resumen:
The present paper deals with the poly(lactic acid) (PLA) reactive
processing simulation in a uniform corotating twin-screw extruder that
can be readily turned into practical applications in pilot and
industrial equipment. The simulator provides a cause-effect guide that
can be useful for starting an experimental setup in a reactive screw
extruder for a biopolymer in a growing industry. The proposed model
considers a free radical ring-opening mechanism involving the main
characteristic flows inside the extruder and the non-Newtonian behavior
of PLA. The characteristic behavior relating reaction rate, average
molecular weights, and polydispersity against chamber number are
described by S-shaped and monotonically decreasing curves, for the
equipment. Numerical predictions show that this simple and easy to
implement model accurately reproduces previously reported data and that
the impurity concentration exhibits a marked effect over all the
variables, except conversion.
Filiaciones:
Vargas R.O.:
ESIME Azcapotzalco, Instituto Politécnico Nacional, Avenida de las Granjas No. 682, Delegación Azcapotzalco, México, DF, 02250, Mexico
López-Aguilar J.E.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, Mexico
Martínez-Suástegui L.A.:
ESIME Azcapotzalco, Instituto Politécnico Nacional, Avenida de las Granjas No. 682, Delegación Azcapotzalco, México, DF, 02250, Mexico
López-Serrano F.:
Univ Nacl Autonoma Mexico, Fac Quim, Dept Ingn Quim, Mexico City 04510, DF, Mexico
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