羟基磷灰石改性聚甲基丙烯酸甲酯的耐热性能

为了改善聚甲基丙烯酸甲酯的热性能,通过微乳液合成方法制备了羟基磷灰石与聚甲基丙烯酸甲酯的杂化材料,并利用扫描电镜、傅立叶红外光谱、X射线衍射和热分析方法对羟基磷灰石/聚甲基丙烯酸甲酯杂化材料的结构与形貌进行表征,研究了羟基磷灰石含量对于杂化材料热性能的影响.结果表明在杂化材料中,羟基磷灰石被聚甲基丙烯酸甲酯所包覆;羟基磷灰石/聚甲基丙烯酸甲酯杂化材料的热性能明显优于纯的聚甲基丙烯酸甲酯;随着羟基磷灰石含量的增加,聚甲基丙烯酸甲酯的热性能显著提高;当羟基磷灰石含量为5%时,聚甲基丙烯酸甲酯的玻璃化转变温度增加到132℃,而且羟基磷灰石/聚甲基丙烯酸甲酯杂化材料的热稳定性也随着羟基磷灰石含量的增加而增强.

Hybrid of polymethyl methacrylate and hydroxyapatite prepared by microemulsion polymerization

To improve the thermal property of polymethyl methacrylate,the hybrid of polymethyl methacrylate and hydroxyapatite was successfully prepared via microemulsion polymerization. Fourier trans- form infrared spectroscope, scanning electron microscope,X-ray diffraction and thermal analysis method test were carried out to characterize the structure and morphology of the hybrids. The effect of the con- tent of hydroxyapatite on the thermal properties of the hybrid was studied. The results indicate that hydroxyapatite is coated with polymethyl methacrylate~the thermal properties of the hybrids are better than those of pure polymethyl methacrylate~ the thermal properties of polymethyl methacrylate are im- proved with the increase of hydroxyapatite; the temperature of glass transition of polymethyl methacry- late increases to 132 ℃ when the content of hydroxyapatite is 5%;the thermal stability of the hybrid is also improved with the increase of hydroxyapatite.