摘要
采用硅烷偶联剂KH-560对纳米氧化铝(nano-Al2O3)进行表面处理后与尼龙6(PA6)熔融共混制备PA6/nano-Al2O3复合材料,用扫描电镜(SEM)观察了材料断面形貌,借助差示扫描量热仪(DSC)研究了原料配比及降温速率对PA6/nano-Al2O3复合材料结晶性能影响。结果表明,nano-Al2O3在PA6结晶过程中起异相成核作用,限制了PA6分子链运动,使复合材料玻璃化转变温度及结晶度提高,非等温结晶过冷度降低,结晶速率加快;材料结晶温度、结晶焓、结晶度随降温速率增加而下降。
PA6/nano-Al2O3 composites with different contents of nano-Al2O3 treated with coupling agent of KH- 560 were prepared by melt blending method. Scanning electron microscopy （SEM）revealed a fine dispersion of nano- Al2O3 in the composites. The crystallization properties of PA6/nano-Al2O3 composites were investigated by means of the DSC at different cooling rate. The results show that the crystallization rate of nanocomposites is increased, the nanc-Al2O3 works as a nucleation agent and increases the crystallinity of nanocomposites, the glass-transition temperatures of the nanocomposites are higher than that of the pure PA6. The crystalline temperature, crystalline enthalpy, crystallinity is decreased respectively when the cooling rate is increased.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2009年第2期89-92,共4页
Polymer Materials Science & Engineering
基金
浙江省重大科技专项(2006C11172)
浙江省教育厅项目(20060801)资助
