Abstract
In the present paper, the effect of the applied irradiation dose on morphological and mechanical properties of three different polyamide grades (unreinforced, 30w% glass fiber content, 35w% glass fiber content) was investigated. These materials are of special interest for solar-thermal collectors and other solar applications. In total, five different irradiation doses in the range of 0kGy and 200kGy were applied and the resulting various cross-linked PA grades were characterized using thermogravimetric analysis, differential scanning calorimetry, dynamic mechanical analysis and tensile tests. The thermogravimetric analysis confirmed the specified glass fiber contents and exhibited similar decomposition temperatures. Morphological changes in the irradiated samples were detected using differential scanning calorimetry comprising a shift to lower melting temperatures in irradiated samples. Furthermore, irradiation leads to increasing storage moduli and higher glass transition temperatures in dynamic mechanical analysis and to higher Young’s moduli and higher strengths in tensile tests.
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