Mejora de la inercia térmica de mezclas de sebs mediante la adición de materiales con cambio de fase (PCMS) a 28º

Abstract

In this work, microencapsulated phase change materials (PCMs) with a melting temperature of 28 ºC have been used to improve thermal inertia phenomena on an elastomeric matrix of styrene-ethylene/butylenes-styrene (SEBS) material. The amount of PCMs has varied in the 1-10 wt. % and these materials have been processed by conventional injection molding without PCM degradation. Mechanical characterization of SEBS-PCM compounds has been carried out and the obtained results show good maintenance of both resistant and ductile properties for PCM amounts comprised in the 1-5 wt. % range. SEM analysis has revealed good interaction between PCM microcapsules and SEBS matrix which is a critical aspect to obtain good mechanical performance. The effect of PCM addition on thermal inertia has been evaluated by active infrared thermography, showing a remarkable effect on thermal regulation of SEBS in the temperature range close to the melting point of the PCM (28 ºC). This thermoregulation effect is more accurate as the PCM content increases. Also, cooling curves have been constructed in order to quantify the thermal inertia effect in a cooling process.

Keywords

• SEBS
• phase change materials (PCM)
• infrared thermography (TIR)
• thermal inertia.