The Role of Polyvinylpyrrolidone in the Formation of Nanocomposites Based on a Compatible Polycaproamide and Polypropylene

Abstract

The interrelation of physico-mechanical and technological characteristics of newly created nanocomposites on the basis of polypropylene (PP)/polyamide (PA-6) mixture with PVP-modified montmorillonite has been investigated. The significant impact of modified polyamide on technological, physical and mechanical properties and heat resistance of polypropylene has been determined. It has been established that the melt flow index of the resulting composites increases by more than 2 times, compared with pure PP. The hardness, modulus of elasticity and heat resistance of composites were found to be considerably increased in comparison with pure PP due to polypropylene mixing with modified polyamide. At the same time, the percent elongation and the forced-elastic strain of composites are reduced by 2 times.

The Manufacturing of Composite Materials in the Matrix of Modified Phenol-Formaldehyde Resins

“…Among the polymers of the N-vinyl series of great practical interest is polyvinylpyrrolidone (PVP). It is known that PVP has an initiating effect in the polymerization of hydroxyalkylene methacrylates as an active complexing agent [3,7] and also participates in the formation of new polymer matrices of liquid-structured type [14].…”

Investigation of Structure of Nanocomposites on the Basis of Mixture of Polypropylene and Modified Polyamide With Using Scanning Electronic Microscopy

“…На мікрофотографіях їх зламів видно пластинчасту структуру і незначну кількість вкраплень агломератів модифікованого ПА-6 малих розмірів, що може свідчити про цілковите розшарування ММТ. Отримані результати добре корелюють з результатами досліджень фізикомеханічних властивостей і термостійкості таких композитів [14,15,17]. Модуль Юнга (2680-2874 МПа) і твердість (209-249 Н/мм 2 ) цих композитів є в 2-2,5 разу вищими, а температура початку термоокисної деструкції (322 ºС) на 120 ºС вищою, ніж чистого ПП.…”

“…За вмісту ПА-6 70 % мас. в структурі матеріалу утворюються великі порожнини і спостерігається значна кількість нерозподіленого ПА-6, що є причиною понижених величин напруження за розриву і термостійкості [14,17].…”

Properties of the Composites Made of Glauconite and Polyaniline in Aqueous Solutions of Phosphoric Acid

“…Among the nucleation additives that can be used to influence the morphology of polymeric materials, fine metal-containing silicate materials have been widely used [10,11]. These additives can directly affect the size of crystalline formations, the degree of crystallinity and the performance characteristics of polymeric materials.…”