利用火焰喷涂技术制备了聚酰胺12(PA12)及PA12/纳米SiO2(n-SiO2)复合涂层,采用差示扫描量热法(DSC)对涂层的非等温结晶性能进行了分析,探讨了n-SiO2对PA12涂层的结晶速率常数及成核活度系数的影响.结果表明,当n-SiO2的添加量在0.5%~2.5%(质量分数,下同)时,RA12/n-SiO2复合涂层的结晶速率常数和成核活度系数均大于纯PA12涂层,说明PA12/n-SiO2复合涂层更容易结晶;n-SiO2在PA12基体中有明显的成核剂作用;当n-SiO2添加量1.5%时,成核活度系数最小为0.936,成核活度最大,成核作用最明显.
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