【作者】 梁庆优； 杨贤锋； 宋国胜； 向兴华；

【Author】 LIANG Qing-you;YANG Xian-feng;SONG Guo-sheng;XIANG Xing-hua;Analytical and Testing Center,South China University of Technology;

【机构】 华南理工大学分析测试中心；

【摘要】 用等温结晶的方法制备了不同结晶度的聚己内酯样品,用DSC标定了样品的结晶度。样品的红外光谱图经分峰处理后,用结晶度为横坐标、1 470 cm^-1的峰面积A₁₄₇₀与1 458 cm^-1的峰面积A_{1 458}的比值为纵坐标绘制函数图,回归方程为y=-5.034 6x²+5.380 2x-0.030 3,R²=0.996 3,拟合关系良好。结果表明红外光谱可以用来表征聚己内酯的结晶度。1 470和1 458 cm^-1两个峰代表了亚甲基CH₂不同的剪式振动状态。拟合曲线的增长趋缓表明聚己内酯结晶时更易在晶胞的b轴方向堆砌。更多还原

【Abstract】 Polycaprolactone（PCL） samples with different crystallinity were prepared by isothermal crystallization.Crystallinity was determined by DSC method.After peak fitting of infrared spectra of the samples,the function curve was plotted by the area ratio of peaks 1 470 and 1 458 cm 1 to crystallinity.The regression function was y=-5.034 6 x2+5.380 2 x-0.030 3 with R²=0.996 3,which meant good fitting operation.The results showed that infrared spectrometry was suitable for determination of crystallinity of PCL.Peaks 1 470 and 1 458 cm 1 represented different scissoring vibration modes of methylene（CH₂）.Slowing increase of the fitting curve revealed that PCL unit cell trended to grow along the orientation of its b-axis.更多还原