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Polyamide-6: The effects on mechanical and physicochemical properties by electron beam irradiation at different temperatures.

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Title: Polyamide-6: The effects on mechanical and physicochemical properties by electron beam irradiation at different temperatures.
Authors: Adem, E.1 esbaide@fisica.unam.mx, Burillo, G.2, del Castillo, L.F.3, Vásquez, M.1, Avalos-Borja, M.4, Marcos-Fernández, A.5
Source: Radiation Physics & Chemistry. Apr2014, Vol. 97, p165-171. 7p.
Subjects: Polyamides, Physical & theoretical chemistry, Electron beams, Irradiation, Glass transition temperature, Crosslinking (Polymerization)
Abstract: Abstract: The electron beam irradiation of polyamide-6 (PA-6) films was carried out in air over a range of 50–1000kGy at varying temperatures and a dose rate of 5.1kGymin−1. The effects of the irradiation at temperatures above and below the glass transition temperature (T g ) on the thermal and mechanical properties were studied. Melting and crystallization temperatures decreased significantly with the increase in irradiation dose, whereas percent of crystallinity varied only slightly and T g slightly increased for irradiated samples respect to non irradiated one with no significant effect of the dose. Mechanical properties were affected by irradiation. The material became more rigid with a direct relationship between the mechanical properties and the irradiation dose. The irradiation above T g led to a larger variation in the thermal and mechanical properties respect to the irradiation below T g . The changes in properties were related to the crosslinking produced in the amorphous part of the polymer by the electron beam irradiation. [Copyright &y& Elsevier]
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Database: Engineering Source
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Abstract:Abstract: The electron beam irradiation of polyamide-6 (PA-6) films was carried out in air over a range of 50–1000kGy at varying temperatures and a dose rate of 5.1kGymin−1. The effects of the irradiation at temperatures above and below the glass transition temperature (T g ) on the thermal and mechanical properties were studied. Melting and crystallization temperatures decreased significantly with the increase in irradiation dose, whereas percent of crystallinity varied only slightly and T g slightly increased for irradiated samples respect to non irradiated one with no significant effect of the dose. Mechanical properties were affected by irradiation. The material became more rigid with a direct relationship between the mechanical properties and the irradiation dose. The irradiation above T g led to a larger variation in the thermal and mechanical properties respect to the irradiation below T g . The changes in properties were related to the crosslinking produced in the amorphous part of the polymer by the electron beam irradiation. [Copyright &y& Elsevier]
ISSN:0969806X
DOI:10.1016/j.radphyschem.2013.11.008