摘要
以聚乙二醇(PEG)、4,4′-二苯基甲烷二异氰酸酯(MD I)、季戊四醇(PETA)为原料,采用两步法合成了一种交联型聚氨酯固-固相变储能材料(C-PUPCM),通过差示扫描量热分析(DSC)、热重分析(TGA)、广角X射线衍射(WAXD)、偏光显微镜(POM)测试技术对该材料进行形态结构分析,考察了其相变行为。结果表明,该聚氨酯型相变储能材料具有典型的固-固相转变性质,其相变过程是聚氨酯软段PEG由结晶固态转变为无定形固态的过程。同时,通过改变PEG的含量可以得到不同结晶性能、不同相转变潜热、不同相变温度及不同热稳定性的材料。
A solid-solid phase prepared via a two-step process and pentaerythritol ( PETA ) as change material with cross-linking polyurethane structure ( C-PUPCM ) was with polyethylene glycol ( PEG), 4,4 '-diphenylmethane diisocyanate ( MDI ), 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.
出处
《应用化学》
CAS
CSCD
北大核心
2007年第6期652-655,共4页
Chinese Journal of Applied Chemistry
基金
湖南省教育厅资助项目(04C674)
关键词
聚氨酯
聚乙二醇
储能材料
固-固相变材料
相变行为
polyurethane, polyethylene glycol, heat storage material, solid-solid phase change material, phase change behavior
作者简介
通讯联系人:曹琪,女,讲师;E-mini:wjcaoqi@163.com;研究方向:聚氨酯材料