Abstract
The article presents the results of determining the melting point and the melt flow rate, Vicat heat resistance of a composition made of polypropylene waste from the study of polyethylene terephthalate. It has been established that with an increase in the content of polyethylene terephthalate, the melting point and heat resistance according to Vicat increase, and the melt flow rate of the compositions decreases. The Hildebrand solubility parameters and the packing density of macromolecules are calculated using the increment method. The thermal characteristics of the compositions were investigated by the derivatography method. Their decomposition onset temperature, decomposition rate, and the amount of energy consumed for the decomposition of polymers and polymer compositions were determined. It was revealed that the compositions of polyethylene terephthalate with secondary polypropylene are more thermostable than compositions of polyethylene terephthalate with primary polypropylene.
Highlights
In 2020, the volume of polymer consumption in the world exceeded 265 million tons
Polystyrene and acrylonitrile butadiene styrene (ABS) plastics account for about 23.0 million tons of global demand [1,2,3,4,5,6,7,8,9]
The characteristics of the melt of polymeric materials are evaluated by the value of the melting point (Tm) and the melt flow rate (MFR)
Summary
In 2020, the volume of polymer consumption in the world exceeded 265 million tons. Polystyrene and acrylonitrile butadiene styrene (ABS) plastics account for about 23.0 million tons of global demand [1,2,3,4,5,6,7,8,9]. The highest growth rates are expected in the segment of polyethylene terephthalate (PET) and propylene polymers. The development of the market for polystyrene plastics and polyvinyl chloride will slow down. In the period up to 2021, the average annual growth rate of demand for polyethylene terephthalate may exceed 5%, the market capacity - close to 90 million tons.
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