非共价键合聚酯/SiO_2杂化材料的制备与性能  

Synthesis and Properties of Non-covalently Bonded Polyester-Silica Hybrid Materials

作　　者：聂康明[1] 庞文民[1] 王雨松[1] 朱清仁[1] 

机构地区：[1]中国科学院中国科学技术大学结构分析重点实验室

出　　处：《应用化学》2004年第12期1269-1272,共4页Chinese Journal of Applied Chemistry

基　　金：安徽省自然科学基金资助项目 ( 0 3 0 44 80 1)

摘　　要：利用高分子量聚己内酯 (PCL)制备了高分子 无机组分间非共价键化学结合的PCL/SiO2 有机无机杂化透明材料。FTIR、13 CNMR谱研究表明 ,杂化体系中PCL与SiO2 组分间的键合作用主要是依赖于较强的特殊氢键相互作用。共溶剂的V(THF)∶V(EtOH) =10 0∶16时 ,杂化材料的透明度高、凝胶时间短。DSC、TGA结果表明 ,杂化体系中PCL的熔融热焓△Hm和熔点Tm随无机组分含量的增加而降低。热分解的起始和结束温度分别提高到 35 8和 5 6 2℃。PCL/SiO 2 hybrid materials with non-covalently bonding between polymeric and inorganic components were synthesized from high molecular weight poly(ε-caprolactone)(PCL) by a sol-gel process. The FTIR and 13C NMR results confirm that the linkage between the polymeric and inorganic components occur mainly as a result of strongly intermolecular hydrogen bonding in the hybrid system. The transparency of the hybrid materials is good and the geling time is short when the volume ratio of THF to EtOH in the co-solvent is 100∶16. DSC and TGA results show that the enthalpy of fusion and melting temperature of PCL for the hybrid materials decrease with increasing the content of the inorganic component and that the onset and the end points of thermal degradation temperature of PCL in the hybrid materials are up to 358 ℃ and 562 ℃, respectively.

关 键 词：聚己内酯  有机无机杂化  溶胶-凝胶  透明材料 

分 类 号：O632.5[理学—高分子化学]