Influence of heat pretreatment on cross-linking behavior and thermal properties of thermoset semi-finished products with powder resin systems
Rafał Stanik, Peter Lucas, Albert Langkamp, Niels Modler, Maik Gude, Ryszard Pilawka
Quarterly No. 2, 2017 pages 114-118
DOI:
keywords: thermosets, powder processing, glass fibres, thermal properties
abstract The aim of this work was to determine the influence of thermal pretreatment of thermoset semi-finished products on the thermal properties as well as the subsequent processing parameters. For this purpose, the curing behavior in the pretreatment of thermoset fiber reinforced semi-finished products was analyzed. A semi-finished product with glass fiber reinforcement and powder resin system A.S.SET 1010 was investigated. During processing of the rigid semi-finished products, melting-up of the matrix system is necessary before shaping. To determine the influence of this process, samples were pretreated and tested at different heating temperatures and times. The change in the glass transition temperature and the degree of cross-linking was determined using thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC). Thanks to this, the curing behavior and thermal properties of the semi-finished products were evaluated during their pretreatment depending on the heating temperature and time. It was confirmed that the pretreatment has a major influence on the degree of cross-linking, glass transition temperature as well as the later processing parameters.