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 470cm^(-1)的峰面积A1 470与1 458cm^(-1)的峰面积A1 458的比值为纵坐标绘制函数图,回归方程为y=-5.034 6x^2+5.380 2x-0.030 3,R^2=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 458cm^(-1)两个峰代表了亚甲基CH_2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。
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.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2018年第S1期67-68,共2页
Spectroscopy and Spectral Analysis
基金
中央高校基本科研业务费专项资金项目(20152M058)
华南理工大学高层次引进人才启动经费项目资助
关键词
聚己内酯
红外光谱
结晶度
亚甲基
剪式振动
Polycaprolactone
Infrared spectrometry
Crystallinity
Methylene
Scissoring vibration
