A novel poly（styrene-co-acrylonitrile）-graft-polyethylene glycol （SAN-g-PEG） copolymer was synthesized as new solid-solid phase change materials （SSPCMs） by grafting PEG to the main chain of poly（styrene-co-acr...A novel poly（styrene-co-acrylonitrile）-graft-polyethylene glycol （SAN-g-PEG） copolymer was synthesized as new solid-solid phase change materials （SSPCMs） by grafting PEG to the main chain of poly（styrene-co-acrylonitrile）. The chemical structure of the SAN-g-PEG was confirmed by the Fourier transform infrared （FT-IR） and proton nuclear magnetic resonance （1H NMR） spectroscopy techniques. The thermal energy storage properties and the storage durability of the SAN-g-PEG were investigated by differential scanning calorimetry （DSC）. The SAN-g-PEG was endowed with the solid- solid phase transition temperatures within the range of 23-36 ℃ and the latent heat enthalpy ranged from 66.8 kJ/kg to 68.3 kJ/kg. Thermal cycling tests revealed that the SAN-g-PEG kept great heat storage durability after 1000 thermal cycles. The thermal stability was evaluated by a thermal gravity analysis （TGA）, and the initial decomposition temperature （Td） of SAN-g-PEG is 350 ℃, which proves that the SAN-g-PEG possessed good thermal stabilitv.展开更多
基金Financial support of this work is provided by National Natural Science Foundation of China(No.51373027)Education Department of General Item of China(No.LR2012017)
文摘A novel poly（styrene-co-acrylonitrile）-graft-polyethylene glycol （SAN-g-PEG） copolymer was synthesized as new solid-solid phase change materials （SSPCMs） by grafting PEG to the main chain of poly（styrene-co-acrylonitrile）. The chemical structure of the SAN-g-PEG was confirmed by the Fourier transform infrared （FT-IR） and proton nuclear magnetic resonance （1H NMR） spectroscopy techniques. The thermal energy storage properties and the storage durability of the SAN-g-PEG were investigated by differential scanning calorimetry （DSC）. The SAN-g-PEG was endowed with the solid- solid phase transition temperatures within the range of 23-36 ℃ and the latent heat enthalpy ranged from 66.8 kJ/kg to 68.3 kJ/kg. Thermal cycling tests revealed that the SAN-g-PEG kept great heat storage durability after 1000 thermal cycles. The thermal stability was evaluated by a thermal gravity analysis （TGA）, and the initial decomposition temperature （Td） of SAN-g-PEG is 350 ℃, which proves that the SAN-g-PEG possessed good thermal stabilitv.
