Research Information System
PROCESSES OF PETROCHEMISTRY AND OIL REFINING, vol.5, pp.233-238, 2019 (Peer-Reviewed Journal)
The results of the study of the influence of natural mineral fillerserpentinite concentration on the dependence of specific volume on the temperature of low-density polyethylene are presented. The concentration of filler was varied between 1 and 30 wt.%. Serpentinite had the following chemical composition: Mg6 [Si4O10](OH) 8 or 3MgO· 2SiO2· 2H2O (MgO—43.0%, SiO2—44.1%, Н2О—12.9%). Lowdensity polyethylene marks 10604-007 was used as the polymer matrix. The nature of changes in the regularity of crystallization of composites in the process of staged sample cooling is established. At the same time, it was shown that the temperature of the first-order phase transition is practically unchanged and is equal to 85 C. Only when the concentration of serpentinite 30wt.% a decrease in the phase transition temperature to 80 C was recorded. An interpretation of the regularity of formation of crystalline formations during the phase transitions are given. It is shown that with an increase in serpentinite concentration in the composition of the polymer matrix, a decrease in the level of crystallization in the phase transition region is observed. It has been found that the loading of serpentinite contributes to a decrease in the free specific volume. The mechanicm of crystallization of filled composites varies from plate type crystal growth to linear with the continuous formation of crystallization centers