STUDY OF STRUCTURAL CHARACTERISTIC OF POLYETHYLENE TEREPHTHALATE THE RECYCLING
The results of the composition and structure of the secondary research polyethylene terephthalate, and polymer powders based on its received thermomechanical processing and used as binders for the manufacture of composite building materials. Using infrared spectroscopy studied conformational changes in macromolecules of PET. Established that prevail in the primary PET trans conformation ester moieties elementary units, recycled PET and the powders on the basis there of – gauche conformation. The lowest concentration of trans conformers and the lowest degree of crystallinity characteristic of the powder obtained by rapid cooling of the melt recycled PET. It is shown that in the processing of recycled polyethylene terephthalate powders amount of terminal hydroxyl groups decreases, due to possible processes of polycondensation and cross-linking. The experimental data demonstrates the safety of recycled PET macromolecules in the process of thermomechanical processing of the preparation of powders and potentially stable deformation and strength characteristics of the powders as a binder composite materials.