Христина Володимирівна Берладір

Physical and chemical aspects of mechanical activation of polytetrafluoroethylene composite in obtaining and recycling

For successful recycling of polymericfluorine wastes by selecting equipment and its operating modes, their grinding to certain sizes of fractions, effective activation of the composite ingredients and their homogeneous combination is ensured. It is found that introducing fine aggregate, made of recycled materials, to polytetrafluoroethylene leads to the crystallization processes intensification that is associated with a decrease in the nucleation energy barrier. An increase in the content of the aggregate is accompanied by a decrease in the thermodynamic parameters of polymer composite materials and high strength and durability levels. Critical concentration of aggregate, made of recycled materials, which ensure the composite structure homogeneity and the required performance characteristics, is defined. Critical concentration of aggregate, made of recycled materials is 25 %, thus, tensile strength of the composite σ t= 20 MPa, compressive strength σ c = 25 MPa, specific elongation δ = 140 %, wear rate I = 11,0∙10-6 mm3/N∙m are obtained. The methods of instrumental study have confirmed the efficiency of technology for obtaining polytetrafluorethylene composite with aggregate, made of polymericfluorine materials. Performance characteristics of the composite ensure increasing the service life of the seal assembly of compressor 4HM16-10/200 by 1.5 times.

Design of polymer composite which is modeled the spheres and ellipsoids by criterion reconciliation of properties

Створено модель композитного матеріалу на основі полімерів, який включає сферичні та еліпсоїдні частинки. Подано опис стратегії створення композиційного матеріалу на основі порошків політетрафторетилену, вуглецевого волокна і титан карбіду. Для розрахунків були використані еліпсоїдні частинки моделі вуглецевого волокна і сферичні частинки моделі титан карбіду