International Conference Physics.SPb/2025
Optical materials

On the mechanism of laser sintering of polymer powders with water

E. D. Minaeva^a, N. V. Minaev^a, T. N. Popyrina^b, T. S. Demina^b, S. A. Gonchukov^cd, O. L. Zakharkina^a, N. Yu. Ignat'eva^e, V. I. Yusupov<sup>a

a</sup> Institute of Photonic Technologies, Federal Research Centre ‘Crystallography and Photonics’, Russian Academy of Sciences
^b Moscow Aviation Institute
^c National Engineering Physics Institute "MEPhI", Moscow
^d P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
^e Lomonosov Moscow State University, Faculty of Chemistry

Abstract: Temperature fields and microstructural features of microparticles and structures made from them were investigated using thermographic equipment. A significant underestimation of readings near the polymer melting temperature and in the area of laser spot exposure was identified. It was shown that the formation of structures depends on the composition of the microparticles and the conditions of laser exposure. The most reproducible sintering result is observed for moistened microparticles with chitosan. These reults are collectively essential for advancing and optimizing polymer powder synthesis technologies, as well as for laser additive manufacturing of three-dimensional structures.

Keywords: thermal fields, laser sintering, dsc, thermography.

Received: 29.04.2025
Revised: 19.06.2025
Accepted: 24.10.2025

DOI: 10.61011/OS.2025.10.61942.7865-25