高分子量聚对二氧环己酮结晶性能的研究

包一红;张田瑶;陈和春;庞秀炳;白威;熊成东

【期刊名称】《四川大学学报（工程科学版）》

【年(卷),期】2011(043)004

【摘要】利用差示扫描量热法（DSC）,配带热台的偏光显微镜（POM）和X 衍射法（XRD）研究了高分子量聚对二氧环己酮（poly p-dioxanone,PPDO）的结晶行为。研究结果表明,当分子量达到一定程度以后（Mw〉30 000 g/mol）,不但PPDO的结晶行为不受分子量的影响,同时PPDO的晶体结构也不会受到其影响,然而PPDO的球晶生长过程受却受到分子量的显著影响,其球晶生长速度与PPDO的分子量与等温结晶温度均成反比,当分子量达到277 300g/mol时,其在高温100℃时就无法结晶。%The crystalline characteristics of poly p-dioxanone（PPDO）with high molecular weights was researched using differential scanning calorimeter （DSC）,polarized optical microscopy（POM）and X-Ray Diffraction （XRD）.DSC curves of all samples revealed the same crystallization behaviors.The results showed that when the molecular weight of PPDO reaches a certain level（Mw30 000 g/mol）,it will not influence both the crystallization behavior and the glass transition temperature of PPDO.The spherulitic growth rate of PPDO with different molecular weight was investigated using a POM.PPDO-4（Mw=277 700 g/mol）had the highest molecular weight and the smallest spherulitic growth rate.The results confirmed that the higher the molecular weight and