Rheological Behavior Modeling of Recycled ABS/PC Blends Applied to Injection Molding Process

Reig, M. J.; Segui, Vicente Jesus; Zamanillo, Jose Domingo

doi:10.1515/polyeng.2005.25.5.435

Cited by 20 publications

(20 citation statements)

References 4 publications

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“…El empleo de estos modelos supone pues la necesidad de determinar un total de siete paráme-tros (n, τ * , D 1 ,D 2 , D 3 , A 1 y A 2 ), algunos de cuyos valores se pueden predefinir, bien en base a estimaciones verificadas por diversos autores (Reig et al 2007, Reig et al 2005, Ferrándiz et al 2013, o bien por análisis directo de las características de los materiales. Por otro lado, para establecer los valores de viscosidad se realizan iteraciones de los parámetros dependientes junto a los valores obtenidos experimentalmente.…”

Section: Ajustes Al Modelo Reológicounclassified

Análisis y modelizado reológico de polímeros para su aplicación con tecnologías “auto-rizado” y su adaptación a las prácticas de Ingeniería de Materiales Poliméricos

Muñoz

Sànchez-Nácher

Reig

et al. 2017

Model. Sci. Educ. Learn.

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El procesado de los polímeros se realiza en estado fundido, por lo que es necesario realizar un análisis de las propiedades reológicas de estos materiales para poder evaluar su procesabilidad. Los modelos reológicos de los polímeros, como el modelo de Cross-WLF, posibilitan predecir la respuesta viscoelástica de un material y simular el comportamiento del mismo cuando va a ser procesado. En la elaboración mediante extrusión de fibras poliméricas bicomponente con efecto "self-crimping" (auto-rizado) es básico que los dos componentes presenten la misma viscosidad a la salida de la boquilla. Para ello, manteniendo el resto de condiciones de procesado de cada polímero idénticas, cada componente se debe extruir a una temperatura diferente. Gracias a la modelización reológica de Cross-WLF se pueden determinar las parejas de temperaturas dónde los materiales modelizados presentan la misma viscosidad. En el presente trabajo se plantea una sesión práctica para los alumnos de Ingeniería de Materiales Poliméricos. Con ayuda de un reómetro capilar los alumnos deberán ser capaces de determinar el comportamiento reológico de dos polímeros termoplásticos. Después de ajustar dicho comportamiento al modelo de Cross-WLF y con la ayuda de este modelo los alumnos deben ser capaces de determinar parejas de temperaturas en las que ambos polímeros estudiados presenten la misma viscosidad. Polymers are manufactured in molted state, so the rheological properties are mandatory in order to analyze and evaluate its processability. The prediction of the viscoelastic response of a material and the simulation of the behavior of the same when it is processed is achieved with the application of the rheological models. In the preparation by extrusion of bicomponent polymer fibers with self-crimping effect it is essential that the two components have the same viscosity at the nozzle outlet. In order to obtain such viscosity each component must be extruded at a different temperature maintaining all other processing conditions unchanged. Using Cross-WLF rheological modelization is it feasible to determine the temperatures for two polymeric materials in order to obtain the same melt viscosity. In the current work a practical session has been proposed for students of Materials Engineering. Using a capillary rheometer, the students should be able to determine the rheological behavior of two thermoplastic polymers. After adjusting the behavior of the polymers to Cross-WLF model and using the proposed model the students should be able to determine the temperatures in which both polymers have the same viscosity.

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Section: Ajustes Al Modelo Reológicounclassified

Análisis y modelizado reológico de polímeros para su aplicación con tecnologías “auto-rizado” y su adaptación a las prácticas de Ingeniería de Materiales Poliméricos

Muñoz

Sànchez-Nácher

Reig

et al. 2017

Model. Sci. Educ. Learn.

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“…In accordance with this, the following values were adopted for the independent parameters of the SEBS blends used [21]:…”

Section: Characterization Of Sebs Blendsmentioning

confidence: 99%

Validation of the Use of SEBS Blends as a Substitute for Liquid Silicone Rubber in Injection Processes

Juárez

Balart

Boronat

et al. 2013

Materials and Manufacturing Processes

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Liquid silicone rubber is an interesting material at an industrial level, but there are great difficulties in the design and machining of molds, and in addition, it cannot be processed using conventional equipment. Therefore, new lines of research have focused on the search for new materials capable of providing final properties similar to liquid silicone rubber, that can also be engineered using simple, conventional processes and machinery. In this investigation, a range of compatible blends, based on two commercial grades of styrene-b-ethyleneco-butylene-bstyrene (SEBS) thermoplastic elastomer, was studied in order to obtain a range of different Shore A hardness blends for industrial applications where liquid silicone rubber (different hardness) is currently used. The two blended elastomers used had widely differing Shore A hardness values (5 and 90). Once the blended materials had been characterized, the Cross and Williams et al.[20] (Cross-WLF) mathematical model was applied in order to obtain theoretical performance curves for the viscosity of each of the blends. After this, a model was developed using the Computer Aided Engineering (CAE) software package Autodesk Moldflow 2012TM. This computer modeling validated the results obtained from the mathematical models, thus making available to process engineers the full range of hardnesses necessary for industrial products (where liquid silicone rubber is used), while still providing the advantages of thermoplastic injection molding.

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“…By controlling the amount of Injection moulding processing technique is the most commonly used method in plastic industry. The injection process is a conformation process of thermoplastic polymeric material that has been great economic and technologic significance (Reig et al, 2005). The technique is suitable to process many types of polymeric material and the product shapes are sharp.…”

Section: Introductionmentioning

confidence: 99%

Injection moulding simulation analysis of natural fiber composite window frame

Rahman

Sin

Rahmat

2008

Journal of Materials Processing Technology

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Rheological Behavior Modeling of Recycled ABS/PC Blends Applied to Injection Molding Process

Cited by 20 publications

References 4 publications

Análisis y modelizado reológico de polímeros para su aplicación con tecnologías “auto-rizado” y su adaptación a las prácticas de Ingeniería de Materiales Poliméricos

Análisis y modelizado reológico de polímeros para su aplicación con tecnologías “auto-rizado” y su adaptación a las prácticas de Ingeniería de Materiales Poliméricos

Validation of the Use of SEBS Blends as a Substitute for Liquid Silicone Rubber in Injection Processes

Injection moulding simulation analysis of natural fiber composite window frame

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