摘要
采用火焰喷涂法制备了聚酰胺12/纳米SiO2(PA12/nano-SiO2)复合涂层,利用差示扫描量热法(DSC)对复合涂层的非等温结晶过程、熔融行为进行了分析。结果表明:纳米SiO2粒子的加入不仅能提高复合涂层的结晶度和结晶温度,而且使复合涂层的熔融峰温度高于纯PA12涂层,说明纳米SiO2粒子具有明显的成核剂作用,它能诱导聚酰胺大分子结晶,提高其结晶能力、结晶速率、结晶的完善程度及结晶度,并能改善涂层的力学、耐老化及耐摩擦磨损性能。
Polyamide12 （PAl2） and PA12/nano-SiO2 composite coatings were prepared by flame spray. The processes of non-isothermal crystallization, the melt behavior of polyamide 12 and PA12/nano-SiO2 composite coatings were investigated by differential scanning calorimeter （DSC）. The experimental results show that the crystallization temperature, the degree of crystallinity for PA12/nano-SiO2 composite coating and crystallinity content of PA12/nano-SiO2 composite coating increase due to the heterogeneous nucleation of nano-SiO2 particles compared with pure PA12 coating. Meanwhile, nano-SiO2 particles acted as a nucleation agents in the PAl2 matrix and improved the coating＇s mechanical and wear properties.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2008年第2期212-217,共6页
Journal of Functional Polymers
基金
河南省高校杰出人才创新工程资助项目(2006KYCX007)
