火焰喷涂PA1010/nano-ZrO_2复合涂层的非等温结晶动力学  

Non-isothermal crystallization kinetics of flame sprayed polyamide 1010/nano-ZrO_2 composite coating

作　　者：李亚东[1] 马亿珠[1] 强克刚[1] 曹少魁[2] 张治军[3] 

机构地区：[1]郑州轻工业学院材料工程系,河南郑州450002 [2]郑州大学材料工程学院,河南郑州450052 [3]河南大学特种功能材料重点实验室,河南开封475001

出　　处：《化工学报》2007年第9期2395-2402,共8页CIESC Journal

基　　金：河南省高校杰出人才创新工程项目(2006KYCX007);河南省自然科学基金项目(0311022400);河南省教育厅科技攻关项目(2003530293)~~

摘　　要：利用火焰喷涂法制备了聚酰胺1010(PA1010)/纳米氧化锆(nano-ZrO2)复合涂层。采用示差扫描量热法(DSC)研究其非等温结晶行为,对所得的数据分别用Jeziorny法、Ozawa法和Mo法进行处理。结果表明,用Jeziorny法和Mo法处理非等温结晶过程比较理想,而Ozawa法不适用。用Jeziorny法求出的参数Zc(结晶速率常数)和n(Avrami指数)均随降温速率的增加而增加;nano-ZrO2的加入使复合涂层的Zc和n略大于纯PA1010涂层;并使复合涂层结晶半衰期降低、结晶速率及结晶度增大。表明nano-ZrO2具有明显的成核剂作用,加快PA1010的结晶速率,提高涂层的结晶度。The non-isothermal crystallization kinetics of pure polyamide 1010 （PAl010） coating and PAlOlO/nano-ZrO2 composite coating prepared by flame spraying, was investigated by differential scanning calorimetry （DSC） at various cooling rates. The Avrami analysis modified by Jeziorny and a new Mo method could describe the non-isothermal crystallization processes of PAl010 and PA1010/nano-ZrO2 composite coating very well. The values of Zc and n increased with increasing cooling rate. The value of kinetic parameter F （T） increased, and the values of a had no significant change with increasing degree of crystallinity for PA1010 and PAlOlO/nano-ZrO2 composite coating, respectively. The difference in the value of exponent n between PA1010 and PAlOlO/nano-ZrOz composite coating suggested that the nano- ZrO2 act as nucleation agents of PAl010. The values of half-time of crystallization and crystallization rate coefficient （CRC） showed that the crystallization rate of PAlOlO/nano-ZrO2 composite coating was faster than that of PA1010 at a given cooling rate.

关 键 词：聚酰胺1010 纳米氧化锆 复合涂层 非等温结晶动力学 

分 类 号：TQ630.6[化学工程—精细化工]