Blends/composites of poly(lactic acid) (PLA) with poly(butylene succinate-co-lactate) (PBSL) and hydroxyapatite (HAp) were successfully prepared by a conventional melt-mixing process. The thermal properties, phase morphology, crystal structure, and in vitro hydro-degradability of the prepared samples were characterized and compared. Thermogravimetric analysis confirmed that adding HAp increased the thermal stability of PLA/PBSL blends in both air and nitrogen environments. The activation energy for PLA thermal degradation increased with increasing HAp content in the samples. Scanning electron microscopy results showed that HAp was uniformly distributed within the composites. HAp also played a compatibilizer role for the PLA/PBSL blends, leading to evidently reduced size of dispersed PBSL domains. The Avrami crystallization analysis revealed that the n values of PLA in different samples ranged within 2.1–3.9, and the presence of HAp caused athermal nucleation process of PLA crystallization. The activation energy for non-isothermal crystallization of PLA decreased from 136 kJ/mol in neat state to 86 kJ/mol in PLA(70)/PBSL(30)/HAp(20 phr) composite. Melting behavior study revealed that the presence of HAp increased the original crystals stability of PLA in the composites. X-ray diffraction results confirmed that the crystal structures of PLA and PBSL remained in the blends and composites. Finally, in vitro hydrolytic degradation tests showed that the HAp addition facilitated the degradation of the prepared samples.

聚乳酸（PLA）与聚丁二酸琥珀酸酯-共乳酸酯（PBSL）和羟基磷灰石（HAp）的共混物/复合物通过常规的熔融混合工艺成功制备。表征并比较了所制备样品的热性质，相形态，晶体结构和体外水解性。热重分析证实，添加HAp可以提高PLA / PBSL共混物在空气和氮气环境中的热稳定性。PLA热降解的活化能随样品中HAp含量的增加而增加。扫描电子显微镜结果表明，HAp在复合材料中均匀分布。HAp还对PLA / PBSL共混物起着增容剂的作用，从而导致分散的PBSL域的大小明显减小。Avrami结晶分析表明，不同样品中PLA的n值在2.1-3.9之间，并且HAp的存在引起PLA结晶的无核成核过程。在PLA（70）/ PBSL（30）/ HAp（20 phr）复合物中，PLA非等温结晶的活化能从纯态的136 kJ / mol降至86 kJ / mol。熔融行为研究表明，HAp的存在增加了复合材料中PLA的原始晶体稳定性。X射线衍射结果证实，PLA和PBSL的晶体结构保留在共混物和复合物中。最后，体外水解降解试验表明，加入HAp可以促进所制备样品的降解。HAp的存在引起PLA结晶的无核成核过程。在PLA（70）/ PBSL（30）/ HAp（20 phr）复合物中，PLA非等温结晶的活化能从纯态的136 kJ / mol降至86 kJ / mol。熔融行为研究表明，HAp的存在增加了复合材料中PLA的原始晶体稳定性。X射线衍射结果证实，PLA和PBSL的晶体结构保留在共混物和复合物中。最后，体外水解降解试验表明，加入HAp可以促进所制备样品的降解。HAp的存在引起PLA结晶的无核成核过程。在PLA（70）/ PBSL（30）/ HAp（20 phr）复合物中，PLA非等温结晶的活化能从纯态的136 kJ / mol降至86 kJ / mol。熔融行为研究表明，HAp的存在增加了复合材料中PLA的原始晶体稳定性。X射线衍射结果证实，PLA和PBSL的晶体结构保留在共混物和复合物中。最后，体外水解降解试验表明，加入HAp可以促进所制备样品的降解。熔融行为研究表明，HAp的存在增加了复合材料中PLA的原始晶体稳定性。X射线衍射结果证实，PLA和PBSL的晶体结构保留在共混物和复合物中。最后，体外水解降解试验表明，加入HAp可以促进所制备样品的降解。熔融行为研究表明，HAp的存在增加了复合材料中PLA的原始晶体稳定性。X射线衍射结果证实，PLA和PBSL的晶体结构保留在共混物和复合物中。最后，体外水解降解试验表明，加入HAp可以促进所制备样品的降解。