PEEK/HA生物复合材料的结晶动力学

Crystallization Kinetics of PEEK/HA Composite

在合成聚醚醚酮(PEEK)的基础上,采用原位聚合法制备了纳米羟基磷灰石(HA)质量分数分别为10%,20%,30%的PEEK/HA复合材料。采用差示扫描量热仪(DSC)研究了纳米羟基磷灰石对PEEK结晶动力学的影响。通过Kissinger法和Ozawa法分别计算出复合材料结晶动力学参数。结果表明,纳米羟基磷灰石在PEEK/HA复合材料中可起成核剂作用,能降低PEEK结晶活化能,在加入20%纳米羟基磷灰石时,聚醚醚酮复合材料的结晶活化能(ΔE)最低,结晶效果最好。

Based on the synthesis of polyether-ether-ketone （PEEK）, PEEK/hydroxyapatite （HA） composites were prepared using in situ polymerization. HA contents were 10 %, 20 % and 30% respectively. The effect of HA on PEEK crystallization was studied using differential scanning calorimetry （DSC）. According to Kissinger method and Ozawa law, crystallization kinetics parameters of the composite materials were calculated. The results show that HA performs as a nucleating agent and then lowers the crystallization activation energy of the composites within the crystallization time. When HA mass fraction is 20 %, the crystallization activation energy reaches the minimum value and the composite has the highest crystallinity.