摘要
用熔融插层法制备聚甲醛 /蒙脱土纳米复合材料 ,用 X射线衍射研究聚甲醛及复合材料的微观结构 ,表明复合材料是纳米复合材料 .用 DSC法研究其非等温结晶行为 ,对所得数据分别用 Jeziorny法、Ozawa法和 Liu法进行处理 .结果表明 ,Jeziorny法和 Liu法处理非等温结晶过程比较理想 .聚甲醛及聚甲醛 /有机蒙脱土纳米复合材料的结晶活化能分别为 3 3 4.6和 1 96.9k J/mol,说明有机蒙脱土的加入 ,降低了聚甲醛的结晶活化能 ,且 t1/ 2 缩短 ,起到了异相成核的作用 .
Polyoxymethylene/organo montmorillonite (POM/Mont) nanocomposites were prepared by melt direct intercalation, and the basal spacing of montmorillonite was detected by X ray diffractometer(XRD). The nonisothermal crystallization kinetics of polyoxymethylene(POM) and POM/Mont nanocomposite were investigated by differential scanning calorimetry(DSC). The Jeziorny, Ozawa and Liu methods were employed to analyze the DSC data. The results showed that both Jeziorny and Liu methods could describe this system very well. The activation energies evaluated by Cebe method were 334 6 kJ/mol and 196 9 kJ/mol for the nonisothermal crystallization of POM and POM/Mont nanocomposite, respectively. Intercalation of organic montmorillonite into POM decreased its activation energy and half time of crystallization, playing a role as a nucleating agent for nonisothermal crystallization of POM.
出处
《应用化学》
CAS
CSCD
北大核心
2001年第9期721-725,共5页
Chinese Journal of Applied Chemistry
基金
安徽省自然科学基金项目 ( 990 46317)
