Internal friction in irradiated polymethylmethacrylate

Some results of the influence of γ radiation on the mechanical properties of Polymethylmethacrylate are presented. Doses of 0, 50, 100, 150 and 200 kGy were employed. The internal friction (loss tangent) and storage shear modulus were measured at temperatures between 173 K and 300 K using a damped t...

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Guardado en:
Detalles Bibliográficos
Publicado: 1996
Materias:
Anelastic relaxation
Compression testing
Gamma rays
Gel permeation chromatography
Glass transition
Internal friction
Mechanical properties
Molecular weight
Strain rate
Temperature
Storage shear modulus
Polymethyl methacrylates
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11554339_v6_n8_pC8_Goyanes
http://hdl.handle.net/20.500.12110/paper_11554339_v6_n8_pC8_Goyanes
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_11554339_v6_n8_pC8_Goyanes
record_format dspace
spelling paper:paper_11554339_v6_n8_pC8_Goyanes2023-06-08T16:09:19Z Internal friction in irradiated polymethylmethacrylate Anelastic relaxation Compression testing Gamma rays Gel permeation chromatography Glass transition Internal friction Mechanical properties Molecular weight Strain rate Temperature Storage shear modulus Polymethyl methacrylates Some results of the influence of γ radiation on the mechanical properties of Polymethylmethacrylate are presented. Doses of 0, 50, 100, 150 and 200 kGy were employed. The internal friction (loss tangent) and storage shear modulus were measured at temperatures between 173 K and 300 K using a damped torsion pendulum. Compressive tests were made at room temperature with strain rates between 1.4×10-3 s-1 and 3.5×10-2 s-1. The materials studied were previously characterized by means of their molecular weight with the GPC technique. Loss tangent versus frequency curves are given, showing the α, α′ and β relaxations. A linear relationship between the glass transition temperature, calculated at a fixed frequency, and the irradiation dose is obtained. An anomalous behaviour of the shear storage modulus of the material when it was irradiated at doses lower than 100 kGy was noticed. A similar response was observed in measurements of the yield point in the same material. 1996 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11554339_v6_n8_pC8_Goyanes http://hdl.handle.net/20.500.12110/paper_11554339_v6_n8_pC8_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 Anelastic relaxation
Compression testing
Gamma rays
Gel permeation chromatography
Glass transition
Internal friction
Mechanical properties
Molecular weight
Strain rate
Temperature
Storage shear modulus
Polymethyl methacrylates
spellingShingle Anelastic relaxation
Compression testing
Gamma rays
Gel permeation chromatography
Glass transition
Internal friction
Mechanical properties
Molecular weight
Strain rate
Temperature
Storage shear modulus
Polymethyl methacrylates
Internal friction in irradiated polymethylmethacrylate
topic_facet Anelastic relaxation
Compression testing
Gamma rays
Gel permeation chromatography
Glass transition
Internal friction
Mechanical properties
Molecular weight
Strain rate
Temperature
Storage shear modulus
Polymethyl methacrylates
description Some results of the influence of γ radiation on the mechanical properties of Polymethylmethacrylate are presented. Doses of 0, 50, 100, 150 and 200 kGy were employed. The internal friction (loss tangent) and storage shear modulus were measured at temperatures between 173 K and 300 K using a damped torsion pendulum. Compressive tests were made at room temperature with strain rates between 1.4×10-3 s-1 and 3.5×10-2 s-1. The materials studied were previously characterized by means of their molecular weight with the GPC technique. Loss tangent versus frequency curves are given, showing the α, α′ and β relaxations. A linear relationship between the glass transition temperature, calculated at a fixed frequency, and the irradiation dose is obtained. An anomalous behaviour of the shear storage modulus of the material when it was irradiated at doses lower than 100 kGy was noticed. A similar response was observed in measurements of the yield point in the same material.
title Internal friction in irradiated polymethylmethacrylate
title_short Internal friction in irradiated polymethylmethacrylate
title_full Internal friction in irradiated polymethylmethacrylate
title_fullStr Internal friction in irradiated polymethylmethacrylate
title_full_unstemmed Internal friction in irradiated polymethylmethacrylate
title_sort internal friction in irradiated polymethylmethacrylate
publishDate 1996
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11554339_v6_n8_pC8_Goyanes
http://hdl.handle.net/20.500.12110/paper_11554339_v6_n8_pC8_Goyanes
_version_ 1768542801190977536

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