Microfilled Epoxy-Composites, Capable of Thermo-Hardening and Thermo-Plasticization After Hard Heating (200-300 ОC)-For “in-Field\Offroad” Use in Bio-, Agro-, Medservice

Requirement in effective repair and 3D-copyright compositions for ambulances and research groups “in-field” is actual now. Even appearance of 3d-printers and single-use cheap instruments decides a problem only on the insignificant moving away from cities or service centers. In regions with the low level of hygiene, the deficit of instruments (special, new or quality) appears industry or populated constantly. And such regions even now is majority and it is Sahara\Africa, Antarctic Continent or Siberia not only. Low-habitate and deprived many blessing of civilization even such regions as west of China, west of the USA, north-west of the USA and Canada, mountain districts of Asia and South America. Problems with the quality providing are present and in Europe and inhabited regions, in periods of geo-, techno-, military and social troubles. Epoxy resin is open 120 years ago by Russian chemists Dianine (his name in term “EpoxyDian resin”) and Prilezhaeff [1]. Until now, possibility of epoxy resin as rapid repair-copying material still not used full. Her dignities also not always are estimated. We will lead a few from them:


Introduction
Requirement in effective repair and 3D-copyright compositions for ambulances and research groups "in-field" is actual now.
Even appearance of 3d-printers and single-use cheap instruments decides a problem only on the insignificant moving away from cities or service centers. In regions with the low level of hygiene, the deficit of instruments (special, new or quality) appears industry or populated constantly. And such regions even now is majority -and it is Sahara\Africa, Antarctic Continent or Siberia not only. Low-habitate and deprived many blessing of civilization even such regions as is open 120 years ago by Russian chemists Dianine (his name in term "EpoxyDian resin") and Prilezhaeff [1]. Until now, possibility of epoxy resin as rapid repair-copying material still not used full.
Her dignities also not always are estimated. We will lead a few from them: a) Widely accessible and used, is comparatively cheap (5)(6)(7)(8)

Methods and Reagents
Samples were prepared on the basis of classic dianepoxy resin Compression tests were subjected to cylindric samples (diameter 6.5 mm, height 10-12 mm) on a "LouisShopper" press machine [17].
Microhardness tests were subjected on a Rockvell testing portative machine (immersion of steel sphere into template plate on 10-60 mcm). SEM-images were scanned on JEOL GSM microscope.

Experimental Results
Compression tests. The first example of hardening and plasticization after destructive heating. Filling only in some cases (for SiC) allows to increase the compressive strength F (Figures   1 & 2). But the unfilled polymer after heating significantly (25%) loses its strength. And, all the microfilled composites taken after The reduction of shrinkage (Table 1)     And really, fom Table 2 it is clear, that discussed composites can be essential plasticized after 250°C. This is indicated by the possibility of deeper penetration of steel sphere -up to 60 microns or more (instead of 30-40 microns without 250°C) -unlike the H-polymer, which naturally loses plasticity after 250°C. Indeed, during mild heat treatment, the filled compositions have, as a rule, 30-50% higher microhardness than the Unfilled polymer.
But unlike the unfilled polymer, they do not differ in plasticity, and are fragile when a punch is dipped over 20-30 microns ( Table 2).
The reinforcing and plasticizing effect of the fillers is noticeable after destructive heat-treatment (250°C), when the unfilled samples retains its microhardness Table 3, but loses its plasticity, significantly destructuring. And really, the maximum immersion without cracking for Unfilled in this case is no 50-70 microns, and only 30-40 microns. On the contrary, a composite with SiC after 250°C acquires significant plasticity, while maintaining (and even increasing) the microhardness ( Table 2). The same, although to a lesser extent, can be said of the SiC/Zement mixture Figure 3.
The composite with TiN was initially (after 55 °C) harder than the H-polymer (Table 2), but it is much more fragile. After 250°C, its plasticity increases markedly,-which, however, is accompanied by a drop in microhardness (but it remains higher than for the Unfilled polymer). That is, with any heat treatment, the composite with TiN gives a higher microhardness than the Unfilled polymer, moreover, after 250°C, it acquires plasticity.   On the example of 50 wt% marshalite, the effects of thermoplasticization and thermo-hardening (after 50 μm immersions, Table 2 are even more noticeable. Thus, is possible find a fillers that make the microhardness insensitive to heating or even grows after it. The increase in heat resistance after filling is also manifested in a noticeable increase in fire resistance -in 1.5-2 times (from 1.3 to 2 or 3 seconds, Table 3. This is due to the appearance of a large