Dynamic mechanical behavior of atactic and high-impact polystyrene

Results of the dynamic mechanical behavior of atactic polystyrene (PS) and high-impact polystyrene (HIPS) for temperatures between 300 and 425 K at a frequency of the order of 50 kHz are presented. The storage Young's modulus, (E′), of the HIPS is lower than the PS value, being the relationship...

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Autor principal: Goyanes, S.N.
Formato: JOUR
Materias:
Annealing
Elastic moduli
Glass transition
Mineral oils
Relaxation processes
Thermal effects
Viscoelasticity
Volume fraction
Atactic polystyrene
High impact polystyrene
Polystyrenes
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00218995_v75_n7_p865_Goyanes
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00218995_v75_n7_p865_Goyanes
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spelling todo:paper_00218995_v75_n7_p865_Goyanes2023-10-03T14:22:33Z Dynamic mechanical behavior of atactic and high-impact polystyrene Goyanes, S.N. Annealing Elastic moduli Glass transition Mineral oils Relaxation processes Thermal effects Viscoelasticity Volume fraction Atactic polystyrene High impact polystyrene Polystyrenes Results of the dynamic mechanical behavior of atactic polystyrene (PS) and high-impact polystyrene (HIPS) for temperatures between 300 and 425 K at a frequency of the order of 50 kHz are presented. The storage Young's modulus, (E′), of the HIPS is lower than the PS value, being the relationship between them a function of the rubber phase volume fraction, independent of the measurement frequency. The glass transition temperature (Tg) of HIPS is shifted to lower temperature in respect to the PS. The γ relaxation appears at 308 K in PS at 50 kHz, while it seems to move toward lower temperatures in the HIPS. Both shifts are attributed to the presence of mineral oils in the HIPS. The values of E′, Tg, and the temperature of the γ relaxation at 50 kHz are discussed within the scope of the theory of viscoelasticity. Finally, the effect of thermal treatments, using different annealing times, on the behavior of both materials is shown. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00218995_v75_n7_p865_Goyanes
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Annealing
Elastic moduli
Glass transition
Mineral oils
Relaxation processes
Thermal effects
Viscoelasticity
Volume fraction
Atactic polystyrene
High impact polystyrene
Polystyrenes
spellingShingle Annealing
Elastic moduli
Glass transition
Mineral oils
Relaxation processes
Thermal effects
Viscoelasticity
Volume fraction
Atactic polystyrene
High impact polystyrene
Polystyrenes
Goyanes, S.N.
Dynamic mechanical behavior of atactic and high-impact polystyrene
topic_facet Annealing
Elastic moduli
Glass transition
Mineral oils
Relaxation processes
Thermal effects
Viscoelasticity
Volume fraction
Atactic polystyrene
High impact polystyrene
Polystyrenes
description Results of the dynamic mechanical behavior of atactic polystyrene (PS) and high-impact polystyrene (HIPS) for temperatures between 300 and 425 K at a frequency of the order of 50 kHz are presented. The storage Young's modulus, (E′), of the HIPS is lower than the PS value, being the relationship between them a function of the rubber phase volume fraction, independent of the measurement frequency. The glass transition temperature (Tg) of HIPS is shifted to lower temperature in respect to the PS. The γ relaxation appears at 308 K in PS at 50 kHz, while it seems to move toward lower temperatures in the HIPS. Both shifts are attributed to the presence of mineral oils in the HIPS. The values of E′, Tg, and the temperature of the γ relaxation at 50 kHz are discussed within the scope of the theory of viscoelasticity. Finally, the effect of thermal treatments, using different annealing times, on the behavior of both materials is shown.
format JOUR
author Goyanes, S.N.
author_facet Goyanes, S.N.
author_sort Goyanes, S.N.
title Dynamic mechanical behavior of atactic and high-impact polystyrene
title_short Dynamic mechanical behavior of atactic and high-impact polystyrene
title_full Dynamic mechanical behavior of atactic and high-impact polystyrene
title_fullStr Dynamic mechanical behavior of atactic and high-impact polystyrene
title_full_unstemmed Dynamic mechanical behavior of atactic and high-impact polystyrene
title_sort dynamic mechanical behavior of atactic and high-impact polystyrene
url http://hdl.handle.net/20.500.12110/paper_00218995_v75_n7_p865_Goyanes
work_keys_str_mv AT goyanessn dynamicmechanicalbehaviorofatacticandhighimpactpolystyrene
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