Bio-based composites made from lactic acid resins

This bachelor thesis is about the synthesis of polyurethane glue, which is capable of gluing together sawdust, and about the testing of the mechanical characteristics of the glue and sawdust compostion. This glue is biodegradable and is created from renewable resources, this is why it could be an appropriate replacement for phenol formaldehyde, melamine, and urea formaldehyde resins. Another indisputable advantage is the absence of arenes in the macromolecule structure, which can be carcinogenic. In this synthesis, the compounds polylactic acid and hexamethylene diisocyanate were chosen, the former as the polyol and the latter as the isocyanate. In the theoretical section of the thesis, the used compounds are described in terms of their characteristics, their creation and the tests of the composites as well. In the experimental section, the conducted experiments are described