摘要
以辛酸亚锡为催化剂,通过针状纳米羟基磷灰石(HA)的-OH引发ε-己内酯(ε-CL)开环聚合,再接枝不同量的丙交酯(D,LLA),制备了HA-PCL-PLA复合材料。用傅里叶变换红外光谱、X射线衍射、差示扫描量热法等对聚合物的结构进行表征。红外测试结果表明,样品的结晶度大致相同,且结晶度都不高;而DSC的测试结果表明,HA-PCL-PLA体系中的PCL比纯PCL呈现低的结晶度,PCL的结晶受到了限制,D,LLA的加入阻碍了ε-CL的结晶。PLM测试显示同等温度下PCL球晶大小随着D,LLA质量的增加而增大,D,LLA的接枝可以显著改变PCL的结晶形态。
By using stannous octoate as the catalyst, hydroxyapatite（HA） was surface-grafted with poly（ε-caprolactone） （PCL） by the ring opening polymerization, and then grafted with different quantity of D,L-lactide. The structure and properties of the composite were characterized by Fourier transform infrared（FTIR） spectroscopy, X-ray diffractometry and differential scanning calorimetry. The FTIR spectroscopy shows that the crystallinity degree of the PCL composite biomaterials was more or less the same. The crystallization temperatures and melting temperatures of PCL showed that the degrees of PCL crystallinity in the HA-PCL-PLA composite biomaterials were lower than the degree of the pure PCL crystallinity. Such a phenomenon indicated that the degrees of PCL crystalline behavior in the HA-PCL-PLA composite biomaterials were confined by D, LLA. The D, LLA content had much influence on the degrees of PCL crystallinity and the crystalline structures. PLM results showed that the crystallization sizes of PCL became bigger with increasing D, LLA content. The graft of D, LLA changed the crystalline morphology of PCL.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期181-185,共5页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(200471001)
安徽省自然科学基金资助项目(070414193)
关键词
聚(ε己内酯-D
L-丙交酯)
复合材料
结晶行为
结构表征
poly（ε-caprolactone-co-lactic acid）
composite biomaterial
crystallization behavior
structure characterization
