化工学报 ›› 2007, Vol. 58 ›› Issue (9): 2395-2402.

• 材料化学工程与纳米技术 • 上一篇    下一篇

火焰喷涂PA1010/nano-ZrO2复合涂层的非等温结晶动力学

李亚东,马亿珠,强克刚,曹少魁,张治军   

  1. 郑州轻工业学院材料工程系;郑州大学材料工程学院; 河南大学特种功能材料重点实验室
  • 出版日期:2007-09-05 发布日期:2007-09-05

Non-isothermal crystallization kinetics of flame sprayed polyamide 1010/nano-ZrO2 composite coating

LI Yadong, MA Yizhu, QIANG Kegang, CAO Shaokui, ZHANG Zhijun   

  • Online:2007-09-05 Published:2007-09-05

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Zcn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。

关键词:

聚酰胺1010, 纳米氧化锆, 复合涂层, 非等温结晶动力学

Abstract:

The non-isothermal crystallization kinetics of pure polyamide 1010 (PA1010) coating and PA1010/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 PA1010 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 PA1010/nano-ZrO2 composite coating, respectively.The difference in the value of exponent n between PA1010 and PA1010/nano-ZrO2 composite coating suggested that the nano-ZrO2 act as nucleation agents of PA1010.The values of half-time of crystallization and crystallization rate coefficient (CRC) showed that the crystallization rate of PA1010/nano-ZrO2 composite coating was faster than that of PA1010 at a given cooling rate.

Key words:

聚酰胺1010, 纳米氧化锆, 复合涂层, 非等温结晶动力学