Aging effect in the adhesion of a PC/CPVC arrangement for application in thermo-solar collectors

Abstract

This work studies the aging of materials in a polycarbonate/chlorinated polyvinyl chloride (PC/CPVC) arrangement, used in a flat plate thermo-solar collector. Typically, PC is used as an absorbing surface and CPVC in entrance and exit heads of the flow, which in this case is water. In this study, two types of methacrylate adhesives were used to bond both plastics, denominated MP and SK. The experiment comprised a study of adhesion behavior between these polymers and the adhesives, in contact with distilled water at different temperatures and different time intervals, simulating the corresponding operating conditions of a thermo-solar collector. Results showed that the SK adhesive did not fail under these conditions, while the MP adhesive underwent evident aging and adhesive failure. In addition, the PC presented a reduction in its mechanical strength when it was subjected to higher temperatures and periods of hygrothermal exposure, probably due to physicochemical deterioration caused by hydrolysis.

Evaluation of temperature and efficiency in relation to mass flow on a solar flat plate collector in Mexico

“…Moreover, it is important to maintain a low temperature in the collector, particularly in collectors made from plastic materials, such as those proposed by Refs. [14] and [16], where it has been observed that a high temperature can have an adverse effect on a collector made from these materials, giving rise to structural failures [17]. In solar plants mass flow manipulation is used to match the temperature requirements of load processes [18,19], which has been found to work at a smaller scale also.…”