Bai Wei, Chen Dongliang, Zhang Zhiping, Li Qing, Zhang Dujuan, Xiong Chengdong
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.
J Biomed Mater Res B Appl Biomater. 2009 Aug;90(2):945-51. doi: 10.1002/jbm.b.31367.
In this work, poly(para-dioxanone) (PPDO) was mixed with 1% (by weight) calcium carbonate (CaCO(3)), beta-tricalcium phosphate (beta-TCP), or calcium sulphate dihydrate (CSD) by solution co-precipitation. Samples were compression molded into bars using a platen-vulcanizing press. The morphology, thermal and mechanical properties, and crystalline structure of the composites were investigated using differential scanning calorimetry, polarized optical microscopy, scanning electron microscopy, and X-ray diffraction. All results suggest that three types of inorganic particle in this system promote the crystallinity of PPDO and act as an effective nucleating agent: the relative degree of crystallinity of PPDO increased from 30.74% to 100%, and the crystallization temperature of PPDO was increased by 18 degrees C. On the other hand, the mechanical properties of PPDO were changed by the presence of inorganic particles: the tensile strength of PPDO/CSD increased by 11.46%.
在本研究中，通过溶液共沉淀法将聚对二氧环己酮（PPDO）与1%（重量）的碳酸钙（CaCO₃）、β-磷酸三钙（β-TCP）或二水合硫酸钙（CSD）混合。使用平板硫化机将样品压缩模塑成棒材。采用差示扫描量热法、偏光显微镜、扫描电子显微镜和X射线衍射对复合材料的形态、热性能和力学性能以及晶体结构进行了研究。所有结果表明，该体系中的三种无机颗粒促进了PPDO的结晶度，并作为有效的成核剂：PPDO的相对结晶度从30.74%提高到100%，PPDO的结晶温度提高了18℃。另一方面，无机颗粒的存在改变了PPDO的力学性能：PPDO/CSD的拉伸强度提高了11.46%。
