Simulation of Nonlinear Polyurethane Production in a Twin-Screw Extruder

Vargas, René O.; Vivaldo‐Lima, Eduardo; Manero, Ο.

doi:10.1080/03602550500371471

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…The resulting model is simple enough as to be handled with conventional numerical tools and robust enough as to capture the behavior of the system to a good level of agreement with experimental data from different sources. That is accomplished by coupling the flow model of Vergnes et al, also used by our group for polyurethane and poly(methyl methacrylate) production in twin-screw extruders, with a power-law rheology model and a kinetic model which takes into account biopolymer degradation in a semiempirical way . The model was validated using experimental data for diluted acid hydrolysis of cellulose in a batch reactor, which was extended to pretreatment and acid hydrolysis in a twin-screw extruder; hemicellulose extraction from poplar using diluted alkaline hydrolysis in a twin-screw extruder; , and diluted acid hydrolysis of hemicellulose extracted from corn stover, also carried out in a twin-screw extruder …”

Section: Introductionmentioning

confidence: 99%

Modeling of Pretreatment and Acid/Alkaline Hydrolyses of Lignocellulosic Biomasses in Twin-Screw Extruders

Morales‐Huerta

Jaramillo‐Soto

Manero

et al. 2020

Ind. Eng. Chem. Res.

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A mathematical model for pretreatment and hydrolysis of lignocellulosic biomasses in twin-screw extruders is presented. The model allows for calculation of the concentrations of extracted hemicellulose and sugars (xylose and glucose) at different operating conditions (pressure, temperature, and NaOH and H2SO4 concentrations, as well as screw rotational speed). Parameter sensitivity analyses on the effects of process variables on product concentrations are reported. Regarding the pretreatment case, the effects of NaOH concentration, liquid/solid ratio, and screw rotational speed on the extracted hemicellulose are studied. In the case of hydrolysis, the effects of NaOH concentration, screw rotational speed, and barrel temperature on the final concentrations of glucose and xylose are addressed. Reasonably good agreement between experimental data from different pretreatment/hydrolysis systems and laboratories and the calculations obtained with our model is observed.

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Section: Introductionmentioning

confidence: 99%

Modeling of Pretreatment and Acid/Alkaline Hydrolyses of Lignocellulosic Biomasses in Twin-Screw Extruders

Morales‐Huerta

Jaramillo‐Soto

Manero

et al. 2020

Ind. Eng. Chem. Res.

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“…Recently, Vargas et al [389] coupled a series of ideal continuous stirred tank reactor with a kinetic-probabilistic model of polymerization of a non linear polyurethane. The effect of the most important processing parameters (temperature, screw rotational rate, flow rate, stochiometry) on the response (conversion, molecular weight, viscosity and pressure) was well captured by the model.…”

Section: Chemical Engineering Modelsmentioning

confidence: 99%

Reactive Processing of Thermoplastic Polymers: A Review of the Fundamental Aspects

Cassagnau

Bounor‐Legaré

Fenouillot

2007

International Polymer Processing

100

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This work is dedicated to Dr. Alain Michel for his retirement and in memory of Prof. Morand Lambla. Dr. Michel and Prof. Lambla were the pioneers of the development of reactive processing in FranceThe review is devoted to the fundamental aspects of the reactive processing of thermoplastic polymers. First of all, some reactive processing examples, including polymer grafting (vinyl silane, maleic anhydride) and/or functionalization, bulk polymerization (urethane, lactams, acrylate, e-capolactone), polyester modification and new copolymers synthesis, are presented. From a fundamental point of view, the review covers the state of the art in the domains of rheology (specifically modelling of rheo-kinetics), diffusion and mixing in highly viscous reactive or non reactive media. Finally, 1, 2 and 3-D simulation of the reactive extrusion process in twin-screw extruder is reported at the end of the review.

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Reactive Extrusion of Polymers

Tzoganakis

Zhu

2012

Encyclopedia of Polymer Science and Technology

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Reactive extrusion (REX) is a process that combines the mass and heat transport operations with simultaneous chemical reactions taking place inside the extruder for the purpose of modifying the properties of existing polymers or for producing new ones. REX is increasingly becoming a powerful technique to develop and fabricate a variety of novel polymeric materials in a highly efficient and flexible way. This combination of chemical reactions and transport phenomena in an extruder provides a large opportunity window for fast prototyping a plethora of specialty polymers filling in the end‐use gaps among the existing commercial resins and natural products. A very large amount of literature on REX has been accumulated over the past few decades, and this review addresses some of the most recent publications while earlier references can be found in previous literature reviews.

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Simulation of Nonlinear Polyurethane Production in a Twin-Screw Extruder

Cited by 5 publications

References 32 publications

Modeling of Pretreatment and Acid/Alkaline Hydrolyses of Lignocellulosic Biomasses in Twin-Screw Extruders

Modeling of Pretreatment and Acid/Alkaline Hydrolyses of Lignocellulosic Biomasses in Twin-Screw Extruders

Reactive Processing of Thermoplastic Polymers: A Review of the Fundamental Aspects

Reactive Extrusion of Polymers

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