Regulation Features of Structure of Linear Block-Copolyurethane Composites of High Wear Resistance

The influence of the main structural parameters (molecular weight and hard blocks content) as well as methods of filling linear block-polyurethanes and their compositions on their strength, deformation, rheological and tribotechnical characteristics has been studied. A complex approach to produce polyurethane compositions of improved wear resistance has been suggested.

Fire-Resisting Composites Based on Polymer Matrix

In the present work we have studied the thermal stability, flammability, and fume evolution of epoxy matrix composites with different types and amounts of hardeners, fillers, plasticizers, and fire retardants. It is shown that chemical composition of fillers has little effect on the flammability of epoxy composites when the content of mineral fillers is less than 45 % by mass. Smoke formation decreases linearly with increase of the filling degree. It is shown that to obtain low-combustible materials the oxygen index should exceed 31 %.

The Effect of Poly(vinyl chloride) Modifier and Filler Nature on Properties of Polyester Composites

The paper determines the influence of polymer modifier (poly(vinyl chloride)) and finely dispersed inorganic filler on the elastic-deformation and thermophysical properties of polyester materials. The research discovers the change of deformation modulus, elasticity modulus, high elasticity modulus, surface hardness, Vicat softening point, and technological shrinkage of modified polyester composites filled with calcium carbonate and aluminum oxide

Вплив конструктивних змін одношнекового екструдера на переробку поліпропіленових композитів

Досліджено вплив конструкційних особливостей одношнекового екструдера, а
саме довжини шнека і кількості канавок незмінного перерізу в зоні живлення
екструдера, та кількості і природи наповнювача на продуктивність екструдера під час
переробки композитів на основі поліпропілену, наповненого скловолокном, тальком,
крейдою. Встановлено, що використання екструдерів, які обладнані зоною живлення з
канавками, впливає на процес екструзії загалом, а також змінювати характеристики

Film hydrogels on the basis of polyvinylpyrrolidone copolymers with regulated sorption-desorption characteristics

The hydrogel film composites of biomedical purpose based on copolymers of polyvinylpyrrolidone with 2-hydroxyethylmethacrylate have been synthesized. The influence of filler nature, quantity and composition on the regularities of obtaining, structure and properties of hydrogels have been determined. Synthesized hydrogel composites are recommended to be used for the controlled drug release systems.