摘要
利用 γ射线辐射引发醋酸乙烯酯 ( VAc)在蒙脱土 ( MMT)中的原位插层聚合 ,X射线衍射测试与透射电子显微镜观察结果表明 ,PVAc/MMT复合材料为纳米复合材料 .其与 HDPE和 PA6的共混物的扫描电镜测试结果表明 ,PVAc-MMT纳米复合物以微胶囊的形式存在于 PVAc-MMT/HDPE/PA6共混物中 ,均匀分散的 PVAc-MMT纳米复合物改变了复合材料的相结构 .热失重测试结果显示 ,PVAc-MMT/HDPE/PA6的起始分解温度明显高于 PVAc/HDPE/PA6,热失重过程差异较大 ,MMT纳米粒子的存在改变了材料的结构 ,使材料热性能得到了改善 .在 PVAc-MMT/HDPE/PA6共混物中 。
The in suit intercalated polymerization of vinyl acetate(VAc)-montmorillonite(MMT) was initiated via γ-ray irradiation and PVAc-MMT composite was obtained. PVAc was also prepared by the same way. X-ray diffraction(XRD) results show that the PVAc-MMT composite is a kind of nanocomposite, and transmission electron microscopy(TEM) observation gives the same result directly. Ternary blend composed of PVAc-MMT/HDPE/PA6(PMHP) was prepared by melt-mixing way, and scanning electron microscopy(SEM) testing result reveals that the PVAc-MMT nanocomposite dispersed in the PMHP for a kind of capsule particles. Thermogravimetric analysis(TGA) results show that the thermal stability of PMHP is much greater than that of PVAc/HDPE/PA6(PHP) blend because of the phase structure change of PMHP and the existence of PVAc-MMT nanocomposite in that of the ternary blend of PMHP, for the same reason the mechanical properties of PMHP is better than HDPE and PHP blend.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第7期1351-1354,MJ05,共5页
Chemical Journal of Chinese Universities
基金
教育部博士点基金 (批准号 :2 0 0 0 0 3 5 80 5 )资助
