羟基磷灰石辐射接枝甲基丙烯酸甲酯反应的研究

研究了羟基磷灰石在空气中预辐照法接枝甲基丙烯酸甲酯（ＭＭＡ）反应的接枝剂量、单体浓试、接枝温度及无机酸对接枝体系的影响。结果表明，接枝率是由动力学条件控制的，经过恰当的条件选择，可以获得较高的接枝率。对接枝物进行重量法、灼烧法、扫描电镜及红外光谱研究，从不同的侧面证实ＭＭＡ已通过化学键接枝在羟基磷灰石上。表明用辐射引发无机材料接枝有机单体，改善无机－有机复合材料界面，制备生物医学材料的方法是可行的

Study on radiation grafting reaction of MMA onto hydroxyapatite

The grafting reaction of MMA onto hydroxyapatite has been studied with the pre-irradiation method in air. The effects of radiation dose, monomer concentration, reaction temperature and inorganic acid on the system are observed. The grafting copolymerization is found to be controlled by the billetics. If proper kinetic conditions are selected,a better grafting yield can be obtained. Employing weight method, burning method as well as SEM and IR analysis, it has been proved that MMA is definitely grafted onto hydroxyapatite by chemical bonds, which shows that it is possible to improve the interface of inorganic-organic composite meterials and to make bioactive ceramics by using radiation induced-grafting copolymerization.