中文摘要：

利用溶剂复合的方法制备了具有良好生物相容性的表面接枝聚（y-苄基-L-谷氨酸）的改性羟基磷灰石／聚乳酸纳米复合材料，并研究了其熔融与结晶行为．结果表明，聚乳酸的玻璃化转变温度为60．3℃，而复合材料的玻璃化转变温度达到65．8℃，不同样品在140℃等温结晶后，改性羟基磷灰石／聚乳酸复合材料的球晶直径仅为聚乳酸（PLLA）球晶直径的16．7％-66．7％．复合材料的熔点提高到184．4℃．

英文摘要：

Biocompatible poly （ y-benzyl-L-glutamate ） modified hydroxyapatite/poly （ L-lactide ） （ PLLA ） nanocomosites were prepared via solvent-mixing method. Their melting and crystallization behavior were characterized by differential scanning calorimetry（DSC） and polarized optical microscopy（POM）. The results show that the glass transition temperature of PLLA is 60. 3 ℃ and that of the composite can reach 65.8 ℃. After isothermally crystallized at 140 ℃, the spherulites diameter of modified HA/PLLA composites was only 16.7%-66. 7% compared with that of PLLA and the melting point of the composite can rise to 184.4 ℃.