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Rajkiewicz M.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | Slusarski L.,Technical University of Lodz
Przemysl Chemiczny | Year: 2012

Ten carboxylated butadiene-acrylnitrile rubber comps. were prepd. by mixing the resp. rubbers with S (6%) and an accelerator (0.5-2.5%) and vulcanized at 160°C by using a com. rheometer. The vulcanizates were studied for mech. properties. The tensile strength and the Schopper abrasivity increased and optimum vulcanization time, Shore hardness and permanent strain after compression decreased with the increasing S content. The Mooney plasticity, relative elongation, elasticity modulus, ageing resistance, and brittleness temp. did not depend on the rubber compd. compn.


Bielinski D.M.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | Bielinski D.M.,Technical University of Lodz | Ostaszewska U.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | Tomaszewska M.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | And 2 more authors.
Przemysl Chemiczny | Year: 2012

Cryst. Cu phtalocyjanines, phtalocyjanine green, ionic liqs. and functionalized polysilsesquioxanes (POSS) were added as modifiers to rubber compds. cured at 160°C. In some cases, the ionic liq. and POSS were adsorbed on nano-sized SiO2 used as a filler. The addn. of modifiers resulted in an increase in abrasive wear resistance and a decrease in tensile strength of the vulcanizates. Rubber vulcanizates were also surface-treated with ion bombardment or gas fluorination. The surface treatment resulted in decreasing the friction coeff. and swelling in fuels and increasing the surface wettability and surface energy. Use of Ar+ ions for bombardment was most efficient.


Potocki K.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | Zaborski M.,Technical University of Lodz
Przemysl Chemiczny | Year: 2012

Nitrite rubbers was filled with channel C black samples modified with NH2CH2CH2NH(CH2)3Si(OMe) 3, CH2=CHCOO(CH2)3Si(OMe) and (NH2iCH2CH2)2 NH at 120°C and 60 hPa for 24 h and then studied for tensile strength, elongation under stress and tear strength. Only the modification of C black with (NH2CH 2CH2)2 NH resulted in an improvement of the mech. properties of the rubber vulcanizates.


Debek C.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | Rajkiewicz M.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie
Przemysl Chemiczny | Year: 2012

Na montmorillonite (MT) was Intercalated with the yellow dextrin plastlclzed with glycerol and used as a filler (1-4% by mass) for manufg. styrene-butadiene-styrene copolymer and dynamically crosslinked polypropylene/ethylenepropylene-diene blend matrix composites. For comparison, a com. amminium salt-modified MT was also used as a filler (up to 5% by mass). The composites reinforced with the dextrin-modified MT showed higher tensile strength and elongation at break than those reinforced with the com. modified MT. In some cases, exfoliated systems were formed.


Montmorillonite was intercalated with poly(vinyl pyrrolidone) and glycerol In aq. dispersion and used as a filler for butadiene-nitrile rubber. After vulcanization, the rubber was studied for viscoelastic properties (complex modulus and phase shift angle between the strain and stress). The dynamic characteristics of the rubber was better than that of a C black-filled rubber studied for comparison.


Kicko-Walczak E.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | Rymarz G.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie
Przemysl Chemiczny | Year: 2012

Com. epoxy and polyester resins were modified by addn. of com. halogen-free flame retardants (melamine polyphosphate and cyanurate, nano-sized montmorillonite, expandable graphite), cured and studied for O2 index, heat release rate, mass loss during combustion, effective combustion heat and mech. properties. The addn. resulted in an increase in the O2 index, and a decrease in the max. heat release rate and smoke formation. The mech. properties remained unchanged.


Piaskiewicz M.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | Kleps T.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie | Lewandowski M.,Oddzial Zamiejscowy Elastomerow i Technologii Gumy w Piastowie
Przemysl Chemiczny | Year: 2012

Com. isoprene, butadiene-styrene and ethylene-propylene-diene rubbers were crosslinked with 7 various curing systems and studied for network structure, thermooxidative stability, Shore A hardness, tensile strength, elongation at break and ageing resistance. The rubbers with C-C crosslinks showed better thermostability than those with C-S-C crosslinks. The stability decreased with increasing no. of S atoms in the crosslink and with increasing unsatn. degree of the original rubber.

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