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Citation: CAO Qi, LIU Peng-Sheng. Transition Characteristics and Morphology of Cross-linking Polyurethane Solid-Solid Phase Change Material[J]. Chinese Journal of Applied Chemistry, ;2007, 24(6): 652-655. shu

Transition Characteristics and Morphology of Cross-linking Polyurethane Solid-Solid Phase Change Material

CAO Qi ^, ,
LIU Peng-Sheng

1.
College of Chemistry, Xiangtan University, Xiangtan 411105

Corresponding author: CAO Qi,
Received Date: 3 July 2006
Available Online: 5 September 2006
Fund Project: 湖南省教育厅资助项目(04C674) (04C674)

A solid-solid phase change material with cross-linking polyurethane structure (C-PUPCM) was prepared via a two-step process with polyethylene glycol (PEG),4,4'-diphenylmethane diisocyanate (MDI),and pentaerythritol (PETA) as raw materials.The morphology and phase transition behaviors of these C-PUPCM films were investigated by means of differential scanning calorimetry (DSC),thermo-gravimetric analysis (TGA),wide-angle X-ray diffraction (WAXD),polarizing optical microscopy (POM).The results indicate that the C-PUPCM showed typical solid-solid phase transition between amorphous and crystalline of the soft segment PEG.The results also show that C-PUPCMs' with different crystallinities,different latent heats,different phase transition temperatures,and different thermal stable properties can be obtained by means of modifying the weight percentage of PEG.
- polyurethane,
- polyethylene glycol,
- heat storage material,
- solid-solid phase change material,
- phase change behavior
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