尼龙66/蒙脱土复合材料结晶行为的研究  

NON-ISOTHERMAL AND ISOTHERMAL CRYSTALLIZATION BEHAVIOR FOR NYLON66/MONTMORILLONITE COMPOSITES

作　　者：柯林萍[1] 阳明书[1] 张世民[1] 苏泉声[2] 

机构地区：[1]中国科学院化学研究所分子科学中心,工程塑料国家重点实验室北京100080 [2]中国石油天然气集团公司辽阳石油化纤公司,辽阳111003

出　　处：《高分子学报》2002年第4期472-478,共7页Acta Polymerica Sinica

摘　　要：在密炼机中采用熔融共混法制备蒙脱土重量分数为 2 5 %、4 5 %的尼龙 6 6 /蒙脱土复合材料 .通过DSC法对非等温结晶行为及在 2 2 8～ 2 4 0℃范围内的等温结晶行为进行研究 ,并与纯尼龙 6 6进行比较 .从其等温和非等温结晶行为的研究表明 ,蒙脱土起成核剂的作用 ,它的填入使尼龙 6 6结晶速率提高 ,但填料与基体间的相互作用使其链段运动困难 ,结晶活化能提高 ;在研究的填料含量变化范围内 ,结晶行为变化不大 ,并且找到该复合材料在 2 2 8～ 2 34℃范围结晶对温度的不敏感区 ;对非等温结晶过程分析 ,刘结平 莫志深方程是适用的 ,而Ozawa方程则是不适用的 .Nylon66/montmorillonite composites with 2.5 wt% and 4.5 wt% clay loading have been prepared by melt process. Non-isothermal and isothermal crystallization behavior of the samples has been investigated by dynamic scanning calorimeter ( DSC) compared with that of pure nylon66. The results have shown that the presence of montmorillonite particles displays a high propensity to nucleate nylon66 crystallization and enhances the crystallization rate of nylon66. But the strong interaction between nylon66 and montmorillonite restricts the motion of nylon macromolecular segments, which thus leading to the increase of the activation energy of crystallization. The behavior of crystallization with the different filler contents has changed slightly. And the temperature range from 228degreesC to 234degreesC is an insensitive-temperature region of crystallization for composite. Liu's method is suitable for investigating the non-isothermal process,but Ozawa's method is not.

关 键 词：尼龙66 蒙脱土 复合材料 等温结晶行为 非等温结晶行为 熔融共混 

分 类 号：TB332[一般工业技术—材料科学与工程]