中文摘要：

采用熔融共混方法制备了聚（3-羟基丁酸酯-co-4-羟基丁酸酯）[P（3HB—co-4HB）]和纳米氮化钛（TiN）的复合体系，并通过万能材料试验机、差示扫描量热仪（DSC）、偏光显微镜（POM）、X射线衍射仪（XRD）、热失重分析仪（TG）等测试手段考察了不同含量TiN对P（3HB—co-4HB）基体的力学、热力学及结晶性能的影响。结果表明：纳米氮化钛在共混体系中起到成核剂作用，可有效改善P（3HB—co-4HB）结晶性能，提高其韧性。

英文摘要：

The poly （ 3-hydroxylbutyrate-co-4-hydroxylbutyrate ） [ P （ 3 HB-co-4 HB ） ]/nano-titanium ni- tride（TiN） composites were prepared by melting molding method. Universal testing machine, DSC, POM, XRD, and TG were employed to study the influence of content of TiN on mechanical, thermodynamics and crystal properties of P（3HB-co-4HB） matrix. The result indicated that TiN played the role of nucleating a- gents which can improve the crystallization and toughness of P（3HB-eo-4HB）.