Phase change materials particles by Y-shaped polymer composed of polylactide stereocomplex and poly(stearyl methacrylate)

Abstract

Novel Y-shaped copolymer was designed and synthesized with poly(stearyl methacrylate) as phase change material at foot moiety and poly(L,L-lactide)s (PLLAs) as two arm moieties, in order to prepare the uniform sized particles. After particle preparation poly(D,D-lactide) (PDLA) was added to form stereocomplex on the particle surfaces to increase the thermal stability. The particle size resulted in 87 nm and 101 nm for Y-shaped copolymer and diblock copolymer in dimethylformamide media, respectively. They showed well dispersibility in aqueous media compared under air, implying the phase separation of stearyl group in aqueous media contribute to the particle stability