摘要
以辛酸亚锡为催化剂,合成了聚乳酸-聚乙二醇-聚乳酸(PLA-PEG-PLA)共聚物;基于溶胶凝胶(sol-gel)工艺,将PLA-PEG-PLA与TiO2溶胶杂化反应,制备了PLA-PEG-PLA/TiO2杂化材料。采用红外光谱(FT-IR)、光电子能谱(XPS)、差示扫描量热(DSC)和X射线衍射(XRD)方法对杂化材料进行表征和分析。FT-IR和XPS分析结果显示,TiO2溶胶与PLA-PEG-PLA间发生了杂化反应,形成了Ti-O-C键。DSC分析结果显示,随TiO2%(质量分数,下同)含量的增加,杂化材料的耐热性能提高。XRD证实了杂化材料为无定型结构,有利于降解。
Using the stannous octanoate as catalyst,PLA-PEG-PLA copolymer was synthesized.Based on sol-gel process,poly（lacticacid）-poly（ethyleneglycol）-poly（lacticacid）（PLA-PEG-PLA）/TiO2 hybrid material was prepared from PLA-PEG-PLA and TiO2 sol.The hybrid material was characterized and analyzed with Fourier transform infrared spectroscopic（FT-IR）,X-ray photoelectron specroscopy（XPS）,differential scanning calorimetry（DSC）and X-ray diffraction（XRD）techniques.FT-IR and XPS results show that PLA-PEG-PLA can hybridize with TiO2 sol and form Ti-O-C bonds.DSC results indicate that heat resistance of the hybrid material increases with the increase of TiO2%.XRD results show that the hybrid material is amorphous,which is beneficial to degradation.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第3期82-85,共4页
Polymer Materials Science & Engineering
