Abstract
In polymer laser transmission welding (LTW) the process parameters affect the weld seam crystallinity, which impacts mechanical, optical and chemical properties of the weld seam material. However, correlations between process parameters and these material properties are still under investigation. To improve the necessary understanding, spatially resolved crystallinity measurements by Raman microscopic mapping offer valuable insights. This paper demonstrates an advanced spectroscopic evaluation method capable of resolving crystallinity distributions even within the absorbing joining partner. Besides the description of the utilized self-developed Raman microscope, the main focus is put on the mathematical spectral reconstruction by multiple Voigt functions used to calculate the crystallinity.
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