Study on phase transition characteristic op poly (vinyl alcohol) (PVA) / polyethylene glycol (PEG) graft copolymer

摘要

Polymeric solid-solid phase change materials can be fabricated by two methods, they are physical method and chemical method. Physical method has been reported. Some polymeric SSPCM can also be synthesized with chemical method. In these polymer materials, some polymer components serve as solid frameworks, and other polymers serve as the working substances that are fixed on the frameworks by chemical bonding. The essential of phase change of these polymers is the transform between the amorphous and crystal states of the working substances and the whole system remains the solid state due to the existence of solid frameworks.