摘要
将衣康酸与丙烯腈共聚,构建具有双端羧基活性点的聚合物骨架,以二苯甲烷二异氰酸酯(MDI)为桥基,将聚乙二醇(PEG)接枝到聚合物骨架上,制备了丙烯腈-衣康酸共聚物接枝聚乙二醇(AIPCMs).采用红外光谱、差示扫描量热、X射线衍射、偏光显微镜、热失重及水静态接触角等方法研究了其结构、相变潜热性能、结晶性能、结晶形态、热稳定性及亲水性.结果表明,合成的AIPCMs具有固-固相变特性及优异的热储能性能,相变潜热达到70.5 J/g.化学接枝改变了AIPCMs中PEG的结晶结构及结晶形态.AIPCMs的热稳定性优异,初始分解温度达289℃,并且其亲水性较好,接触角最小可达33.71°.
The core of this study firstly synthesizes an ＂active＂ matrix materials with the itaconic acid contai- ning double-carboxyl end group and acrylonitrile copolymer through molecular design. Then, the poly （ethy- lene glycol） （PEG） was grafted to the poly （acrylonitrile-co-itaconate） [ P （AN-co-IA） ] using methylenediphe- nyl diisocyanate （MDI） as a bridge-base and cross-linking agent. The poly （acrylonitrile-co-itaconate）-graft- poly （ ethylene glycol） [ P （AN-co-IA） -g-PEG ] solid-solid phase change materials （SSPCMs） were obtained in this paper. Furthermore, the chemical structure, crystallization properties, thermal energy storage properties , crystallization process, thermal stabilities, and hydrophilic property of the SSPCMs were investigated using Fourier transform infrared, differential scanning calorimetry, wide-angle X-ray diffraction, polarized optical microscopy, thermogravimetric analysis and water contact angle, respectively. The results showed that these SSPCMs had the characteristics of solid-solid phase change, excellent energy storage properties and latent heat of 70 J/g or more. The crystalline morphology and crystal structures of the synthesized SSPCMs are difference from PEG and P（AN-co-IA）. Moreover, The SSPCMs have a good thermal stability and the initial decomposition temperature （ Ta ） is 289 ℃, and the hydrophilic property of the blend membrane were improved, the water contact angle minimum can be achieved at 33.71°.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第12期2557-2562,共6页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:51373027)
辽宁省科学技术基金(批准号:2015020221)资助~~
关键词
固-固相变材料
聚乙二醇
能量储存与转换
丙烯腈-衣康酸共聚物
Solid-solid phase change material
Poly （ethylene glycol ）
Energy storage and conversion
Poly （acrylonitrile-co-itaconate）
