New polymer composites

We are moving toward an era in which simulation and molecular theory will play an important role in the design of new polymers, composites, ceramics, and electronic and photonic materials [21, 22], Much of the theoretical and simulation work to date has asked questions of the form what are the properties of this particular model substance We need to invert this question and ask here is a specific need, for example a difficult or expensive separation—how can we use our theory and simulation techniques to design a material or process to best meet this need [22] One example would be... 

Experimental results obtained allow to mark a promise of this research direction. Developing new polymer composite materials based on natural layered silicates and polyethyleneterephthalate - the most needed polymer material - gives opportunity to modify PET properties and therefore expand the field of its application. 

As new polymer composites are considered, the issues of environmental impact and recycling become even more important. Metals have an advantage over polymer composites because an infrastructure exists for recycling them. However, work is progressing on developing more recyclable polymer composite systems. 

Rubber concrete (RubCon) is a new polymer composite material created and studied by the research team of the Voronezh State University of Architecture and Construction (Russia) and the Israel company Polymate Ltd.-INRC. 

When two polymers are mixed, the resulting blend does not possess the physical properties of the initial polymers. The new polymer composites may seem to be homogenous on a macroscopic scale, but phase separation often takes place on a microscopic scale. Since the macroscopic properties of the mixtures are dictated by their microscopic structure, it is important to be able to detect phase separation and to determine the nature of the phase... 

Kozlov, G. V Batyrova Kh.M. Shustov, G. B. Mikitaev, A. K. Molecular weight distribution of polyarylates the fractal analysis. Proceedings of International Sci.-Pract. Conf New Polymer Composite Materials. Moscow, 2000, 44. 

The industrial practice of introducing new polymer compositions, which is dictated by market requirements, initially overtook the state of knowledge concerning multicomponent polymer blends, but the intensive investigations carried out during the past twenty years led to the formulation of some definitions and scientific... 

LCA methodology applied in the development of new polymer composites is a relative new field, but it has already been widely used in many industrial sectors as a very useful tool to drive the choice of materials and processes towards a more sustainable production system. Several LCA applications to both traditional composites and new green composites have pointed out that the benefits of using green composites produced with natural fibres and bio-derived matrices, compared to traditional composites, appear superior, and their market opportunities are increasing for many industrial sectors. 

It is always possible to copolymerize two monomers in order to get a new polymer composition with desired properties. For example, PLGA is copolymerized from polyglycolide with either L-lactide or o-lactide (Figure 21.8). The copolymer has been used in medical devices and drug applications. 

A number of new polymer composites based on conducting polymers combined with various inorganic materials have recently been described. Polypyrrole and oxide composites have been prepared by the incorporation of Fe304 particles into the CP matrix [77,151]. The oxide particles increased the corrosion protection of the films for iron in a 3% NaCl medium, apparently by increasing the oxidizing properties of the film [77] or by helping to maintain the polymer in its oxidized state [151]. 

Yanovskii, Yu. G. and Kozlov, G. V. Mater. VII Intern. Sci.-Pract. Corf. New Polymer Composite Materials. Nal chik, KBSU, pp. 189-194 (2011). 

In this study, wood fibers modified with nano-sized magnetite have been developed. They show improved electrical conductivity and microwave adsorption ability. Based on these fibers new polymer composites, with special shielding properties against electromagnetic wave,have been obtained. 

Endoh et al. (2009) and Endoh (2006, 2008) have developed new polymer composites (NPCs), which have a highly durable PFSA base under high-temperature and low-humidity conditions. The NPC membrane showed excellent stability that approximated 3000 h in an open-circuit voltage (OCV) test at 120°C and 18% relative humidity, and the continuous operation using an NPC membrane could be... 

Internal. Sci.-Part. Conf. New Polymer Composite Materials . Nal chik, KBSU, 127-133. 

Tager, A. A. (1978). Physics-Chemistry of Polymers. Moscow, Khimiya, 416p. Bashorov, M. T, Kozlov, G. V, Malamatov, A. Kh., Mikitaev, A. K. (2008). Amorphous Glassy Polymers Reinforcement Mechanisms by Nanostructures. Mater of IV Intern. Sci.-Pract.Conf. New Polymer Composite Materials . Nal chik, KBSU, 47-51. 

Figure 7.29 shows a hybridized reactive extrusion and molding system, that is, the combination of an intermeshed twin screw extruder and forming equipment, such as injection molding, film making, etc. Experimental results that have been carried out for PP-PA-PPE ternary blending system are shown in Fig. 7.30. If this hybridized system is used, one can obtain a product with higher physical properties than conventional ones. Furthermore, this system can be fitted with an on-line monitoring device for die evaluation of physical properties of polymer alloys as shown in Fig. 7.31. The potential for a new type of production line for new polymer composites can be envisioned [46-51].

G.V. Kozlov, L.D. Mil man and A.K. Mikitaev in the Proceedings of IV International Science-Practice Conference New Polymer Composite Materials , KBSU, Nal chik, Russia, 1981, p.440. 

In this paper, proeessability and higher-order stmcture of thin-wall molded parts for polypropylene/hexagonal boron nitride (PP/h-BN) composites were investigated to produce new polymer composites with high heat conductivity. Effects of h-BN content and process parameters on processability, thermal property and internal morphology of molded products were discussed. 

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