Jurčiová, Jana

Lacko, Michal

Macho, Vendelín

Počarovský, Pavol

Ďurfinová, Jana

English

DSpace at VSB Technical University of Ostrava

lTINllB� I · Sborník vědeckých prací Vysoké školy báňské - Technické univerzity Ostrava číslo 1, rok 2009, ročník LIi, řada hutnická článek č. 1447 INFLUENCE OF INTERPHASE BASED ON ISOCYANATES AT STARCH SURFACE AND OBSERVING THE APPLICATION IN VULCANIZATES M. LACKO•, J. ĎURFINOVÁ, P. POČAROVSKÝ, J. JURČIOVÁ, V. MACHOFacu/ty o/ Industria/ Technologies, Alexander Dubček Unhlerslty o/ TrenBn; Púchov, S/ovak Republic, contact author: lacko@fpttnuni.sk; durfinova@fpttnuni.sk, pocarovsk>@fpttnuni.sk, jurciova@fpttnuni.sk ABSTRACT: The influence of isocyanates (PIK - phenylisocyariate, MDI - metyldiisocyanate) is inspectéd as an interphase by. means of selected natural polysacharides (starch) in vulcanizated butadiene and styrene-butadiene rubber compounds. By modification of the starch surface we have created an interphase between the polymer matrix and filler particle, and � · also achieved improvements in physical-mechanical properties. When gradually increasing the PIK concentration in modification solution, we observed the increase of tensile strength by vulcanized specimens. By modification with MDI we impr9ved the physical-mechanical properties, but with the further increase ofthe modificator's concentration we observed a decrease ofphysical-mechanical properties. KEY WORDS: interphase, polymer matrix, filler, surface, polar-nonpolar, modification 1 .. INTRODUCTION Incorporation of most of the common fillers into the polymeric matrix is difficult, because of its own polaric character and on the other side because of nonpolaric charecter of polymeric matrix: This is the reason for furiher modification offiller's Surface to the more nonpolaric one. The filler's surface could be changed by creation of interphase. The interphase consists of two different parts. The one which is close to filler has hydrofilic character and the one next to polymeric matrix has hydrofobie character. lnterphase works as connecting element between those two different surfaces and creates transition environment between them. Interphase ensures higher tenacity limit and of course, based on that, better physical-mechanical compound properties. 2.1 Applies surface modificator PIK - PhenyJisoicyanate Molecular weight: Mr = 119.12 g/mol Density = 1093 - 1095 kg/m3 Boil Temperature = 165 °C MDI - 1,4-methyldiphenyldiisocyanate Molecular weight: Mr = 252.24 g/mol Melting point = 38.9 °C 2. FORMATTINGSurface modificators MDI and PIK were observed acting as an interphase at the surface of a filler (starch) and they influenced physical-mechanical properties of filled Butadiene and of Butadiene­Styrene,mbber compound. 94 

Influence of interphase based on isocyanates at starch surface and observing the application in vulcanizates

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Influence of interphase based on isocyanates at starch surface and observing the application in vulcanizates

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