Metal-Containing Nanocomposites on the Basis of Isotactic Polypropylene and Butadiene-Nitrile Rubber
Abstract
One and two-step methods for the synthesis of saccharin-6-carboxylic acid triglyceride were studied. The reesterification reactions of 2-hydroxypropyl-1,3-bis-ethersulfoimide of this acid and glycerol with some aliphatic saccharin6-carboxylic acid esters were carried out. The resulting products are characterized by elemental analysis and IR spectroscopy and size exclusion chromatography. It was found that when using a two-step method, the end product is obtained with the highest yield (85%). The influence of additions of nanofillers (NF) containing nanoparticles of the copper oxide, stabilized by polymer matrix of maleinized polyethylene of high pressure (MPE), obtained by mechano-chemical method on peculiarities of structure and properties of metal-containing nanocomposites on the basis of isotactic polypropylene (PP) and butadiene-nitrile rubber (BNR) by methods of X-ray phase (RPhA) and differential-thermal analyses (DTA) and scanning electron microscopy (SEM) has been investigated. It has been revealed an improvement of the strength, deformation and rheological indices and also the thermal-oxidative stability of the obtained nanocomposites, which has been apparently connected with the synergetic effect of the interaction of the zinc-containing nanoparticles with maleic groups of MPE. It has been shown that the nanocomposites on the basis of PP/BNR/HF can be processed both by pressing method and by methods of casting under pressure and extrusion, which expands the sphere of its application.
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Introduction
The modern stage of development of chemistry and technology of the composition materials is largely determined by the search for ways of creation of materials with an improved complex of properties. The intensive development of the world petrochemical industry intends a constant search for new materials possessing high consumer properties, ecological safety and simplicity of processing. Such materials are not without reason the thermoplastic elastomers (TPE). The creation of TPE is a priority direction of work in the field of polymer materials science [1, 2].
The most perspective direction of preparation of new types of TPE is the mixing of elastomers with plastics with simultaneous vulcanization of the elastomer, which leads to a high degree of dispersity of the rubber phase in the materials. TPEs obtained by this method were called thermoplastic vulcanizates (TPV). A distinctive peculiarity of TPV is the combination of the properties of vulcanized rubbers during exploitation and thermoplastics in the processing. Owing to the complex of high physical-mechanical properties, wide temperature range of working capacity, lower cost of finished products, TPVs are considered one of the most perspective classes of the polymer composite materials. Their application areas are very various [3, 4].
A large number of works on TPE and TPV has been obtained with use of polypropylene (PP) as a thermoplastics, and SKEPT, natural rubber, butadiene nitrile rubber (BNC), etc. – as elastomers. In use of various fillers or compatibilizers for improvement of the compatibility, physical-mechanical and technological properties of the compositions [5-8].
Conclusion
The influence of nanofiller containing nanoparticles of the zinc oxide stabilized by matrix of maleinized polyethylene (MPE), obtained by mechano-chemical method on properties of composites on the basis of PP/BNR has been investigated
The RPhA diffractograms confirm the availability of the zinc oxide nanoparticles in the composition of composites on the basis of PP/BNR.
It has been revealed the improvement of the strength, deformation and rheological indices and also the thermal-oxidative stability of the obtained nanocomposites, which has been apparently connected with the synergetic effect of the interaction of the zinc-containing nanoparticles with maleic groups of MPE.
It has been shown that the nanocomposites on the basis of PP/BNR can be processed both by pressing method and by methods of casting under pressure and extrusion.
It has been shown the prospectivity of use of the nanofiller containing zinc oxide NP, stabilized by a matrix of maleinized polyethylene, obtained by a mechano-chemical method as an additive to PP/BNR, which favors the creation of a finecrystalline structure of the composition, in connection with which its properties are improved and thereby the areas of application of the obtained nanocomposite is expanded.