PMOCOPV/TiO_2纳米复合材料的微观结构与性能

Microcosmic Structure and Properties of PMOCOPV/TiO_2 Nanocomposites

采用原位聚合方法制备聚(2-甲氧基-5-辛氧基)对苯乙炔(PMOCOPV)/二氧化钛(TiO2)纳米复合材料。利用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)和热失重(TG)等方法对纳米复合材料的微观结构与性能进行表征。结果显示,纳米复合材料中TiO2并不是简单地与PMOCOPV分子共混,而是被PMOCOPV分子链缠绕包裹;纳米复合材料为分散均匀的球形微粒,粒径尺寸为60nm～80nm左右;同PMOCOPV相比,纳米复合材料结晶性随着TiO2含量增加而增强,且热稳定性提高。

Poly（2-methoxy-5-octoxy）-p-phenylene vinylene（PMOCOPV）/titanium dioxide（TiO2）nanocomposites with different contents of TiO2 nanoparticles were prepared by in-stiu polymerization and their microcosmic structure and properties were characterized by scanning electron microscope（SEM）,tunneling electron microscope（TEM）,X-ray diffraction（XRD）and thermogravimetry（TG）.The results show that TiO2 nanoparticles are not blended with PMOCOPV simply but encapsulate by PMOCOPV.The nanocomposites are spheric particles that disperse uniformly and the diameter of nanocomposites is around at 60 nm～80 nm.The crystallinity of nanocomposites is improved with the increase of content of TiO2 nanoparticles and the thermal stability of nanocomposites is also enhanced in contrast to PMOCOPV.