Epoxy resin filled with primary and secondary raw material - useable in agriculture

Abstract

Valášek P., Kejval J., Müller M., 2014. Epoxy resin filled with primary and secondary raw material -useable in agriculture. Res. Agr. Eng., Hard inorganic particles in the interaction with polymeric materials increase wear resistance. Also reactoplastics are suitable for filling with micro-and nano-particles for a purpose of some mechanical properties optimization. The paper compares chosen mechanical properties -hardness, wear resistance and tensile characteristics of epoxy resin filled with artificial corundum with various middle particles sizes and their ratio combination. Mentioned systems can be used in a sphere of the agricultural production at renovation of machine parts, they can serve for creating resistant layers on machines, floors and grillages at the same time. The aim of the carried out experiment is to compare the properties of reactoplastics filled with a primary and secondary raw material and to define an optimum ratio of the filler particle size relating to a given mechanical quality. The artificial corundum was chosen as the primary material, the waste corundum from the process of material mechanical treatment was chosen as the secondary one.Keywords: hardness; tensile strength; waste; wear In the sphere of animal and plant production many machines are used whose functional areas are exposed to specific types of degradation. An abrasive wear can be ranked among the most widespread types of the wear in the agrocomplex. Functional areas of machines can be renewed by classical way -overlaying. It is also possible to use polymeric particle composites when coating of such materials is fact and inexpensive and it is not necessary to have a special equipment.Reactoplastics belong to a group of polymers which create chemical bonds among single molecules at a hardening. During the hardening it comes to an interconnection of the macromolecules by transverse covalent bonds which create a reference space grid.The macromolecule setting defines properties of the reactoplastics -it influences permanent deformation in a negative way. Compared with thermoplastics the reactoplastics show higher modulus of elasticity, increased dimensional stability, they are hard and firm. The properties of the reactoplastics e.g. epoxy, polyester, phenolic and other resins are suitable for filling with micro-particles and nano-particles, these resins can serve as matrices of fibre composites at the same time. The epoxy resins are constructional adhesives which can be used at connecting of metals, glass, ceramics and other materials. They excel by good chemical resistance and by mechanical properties.The micro-particles can improve values of a tensile strength and wear resistance. The example