Application and analysis of a DSC-Raman spectroscopy for indium and poly(lactic acid)

Simultaneous measurement system of DSC-Raman spectroscopy and its analysis method are developed. The developed method was applied to the melting of Indium and the optimum laser irradiation condition was determined. The obtained result of the heat flow is similar to the modulated DSC and the precise melting temperature and the heat of fusion can be obtained from the analyzed DSC. DSC-Raman spectroscopy is also applied to PLLA. Analyzed data indicate the existence of the recrystallization behavior in addition to T g and T m. Corresponding to these transitions, Raman peak shifts, intensities, and widths varied. From those results, it is proved that DSC-Raman spectroscopy is useful for the analysis of thermal property of the polymer in connection with the polymer structure.