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Effect of the molding temperature and cooling time on the residual stresses of crystal polystyrene

Acevedo-Morantes, María Teresa and Brieva-Sarmiento, María and Realpe-Jimenez, Alvaro (2014) Effect of the molding temperature and cooling time on the residual stresses of crystal polystyrene. Dyna; Vol. 81, núm. 187 (2014); 73-80 DYNA; Vol. 81, núm. 187 (2014); 73-80 2346-2183 0012-7353 .

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URL oficial: http://revistas.unal.edu.co/index.php/dyna/article...

Resumen

The use of crystal polystyrene for high performance components requires knowledge of the distribution of residual stresses. The aim of this research was to analyze the influence of the molding temperature and cooling time on the residual stresses present in parts of two types of crystal polystyrene PS1 and PS2, processed by injection molding. The results obtained using photoelasticity showed that at low temperatures the residual stresses increase due to the processes of formation and destruction of intermolecular forces. Internal stresses were reduced in the polymer specimens with greater thickness because the molecular relaxation of chains of polystyrene is facilitated by the space increase between the walls of the mold. It was concluded that the photoelasticity technique can be applied effectively in the measurement of residual stresses in injection molded crystal polystyrene parts.

Tipo de documento:Artículo - Article
Información adicional:Derechos de autor reservados
Palabras clave:Tensiones residuales, poliestireno cristal, fotoelasticidad, polaricospio
Unidad administrativa:Revistas electrónicas UN > Dyna
Código ID:45853
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :29 Noviembre 2014 09:52
Ultima modificación:29 Enero 2015 15:23
Ultima modificación:29 Enero 2015 15:23
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