Thermal reliability of organic-organic phase change materials and their shape-stabilized composites

•Thermal reliability of CA/MA, LA/MA and PA/SA, and their SS-PCMs, was studied.•Thermal cycling was performed up to 10000 cycles, simulating 30 years of application.•Chemical changes and thermal properties were studied after 10, 100, 1000 and 10000 cycles.•The eutectics and their SS-PCMs presented good chemical stability up to 10000 cycles.