高等学校化学学报2012，Vol.33Issue(7)：1613-1618,6.DOI:10.3969/j.issn.0251-0790.2012.07.044
聚乙烯醇-g-异氰酸酯-脂肪醇梳状接枝共聚物的合成、结构及热性能
Synthesis, Structure and Thermal Properties of Poly ( vinyl alcohol)-g-isocyanate-fatty Alcohol Comb Copolymers
摘要
Abstract
Using the bridging role of tolylene diisocyanate ( TDI) , poly ( vinyl alcohol) -g-tolylene diisocya-nate-fatty alcohol[ PVA-g-TDI-C( n) , re = 14,16,18] copolymers were synthesized with the fatty alcohols as the thermal storage units along the PVA backbone via the "grafting to" method. The thermal storage behavior, thermal stability and crystalline structure of PVA-g-TDI-C(n) copolymers were detailed investigated by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry ( DSC ) , thermogravimetric analysis (TGA) , X-ray diffraction(XRD). The results show that PVA-g-TDI-C(re) eopolymers exhibit the better thermal storage ability, and the value of enthalpy increases with the side-chain length and the grafting ratio. Compared with the pure fatty alcohols, the grafted ones show the decreased thermal storage efficiency due to the confined mobility of longer methylene groups. Besides the confined mobility of methylene groups, the effect of PVA backbones and the bridging units of TDI also contribute to the decrement of thermal storage ability of PVA-g-TDI-C(re) copolymers. Additionally, PVA-g-TDI-C(n) copolymers exhibit the higher thermal stability than that of pure re-fatty alcohol, and the thermal degradation temperature is located at 324 330 ℃ , proving that it can be used as the solid-solid phase change materials in the aspects of buildings, fiber and textiles, thermal fluids, etc. So, the packing manner and thermal behavior of PVA-g-TDI-C (re) copolymers were further discussed and analyzed from the viewpoints of microstructural mobility.关键词
聚乙烯醇/热能储存/梳状高分子/相变材料Key words
Poly (vinyl alcohol)/ Thermal energy storage/ Comb-like polymer/ Phase change material分类
化学化工引用本文复制引用
石海峰,李剑华,尹亿平,张兴祥,王笃金..聚乙烯醇-g-异氰酸酯-脂肪醇梳状接枝共聚物的合成、结构及热性能[J].高等学校化学学报,2012,33(7):1613-1618,6.基金项目
国家自然科学基金(批准号:20904040,21174105)和天津市自然科学重点基金(批准号:12JC2DJC26800)资助 （批准号:20904040,21174105）
