Investigations on sulphur cured urethane elastoincrs synthesized from poly(ethy1ene-propylenc) adipate, a-ally1 glycerin ether and toluene diisocyanate are described. Synthesis of elastomers was conducted a t various temperatures and times with and without zinc chloride as catalyst and activator of sulphur vulcanization. The experiments revealed a combined effect of zinc chloride, temperature and time of synthesis on plasticity and processing properties of the elastomers and on mechanical properties of the vulcanizates. I'erwendung uon Zinkchlorid als Katalysator und 1.ulkanisationsbeschleuniger bei mil Schwefel vulkanisierten C'rethanelastomerenUntersuchungen van mit Schwefel vulkanisierten Urethanelastomeren, die aus Poly(ethylenpropylen)adipinat, a-Allylglycerinether und Toluen-diisocyanat synthetisiert wurden, werden beschrieben. Die Synthese der Elastomere wurde bei verschiedenen Temperaturen und Reaktionszeiten unter Benutzung van Zinkchlorid als Katalysator und Aktivator der Vulkanisatioii durchgefiihrt. Die Untersuchungen zeigten einen kornhinierten komplexen Einflull des Zinkchlorids, der Temperatur und der Reaktionszeit auf die Plastizitat und die Verarheitungseigenscli~ftrn tlrr crhaltenen Elastomere sowic auf die mechanischen Eigrnschaft en der Vulkanisate.Ilpuntenenue xaopucmoeo y u m a e euae i~arnaau3aniopa-ych-opui~zea~ eyaicanuaaquu npu nonyYefiuu eyai~anu30ea1~~blr cepoli nonuypemaxoebax saacmo~epoe npoBoAEincR HCXOAR 113 non11a~~ne~npon11ne~a~llna~a, a-ann~n-3@ipa rnuuep~i~a EI T O J I~O J I A H H~O~H~H~T~ n p~ Co06rqam~c~1 pe3yJIbTaTbI 11CCJIeAOBaHHH BYJIHaHH30BaHHblX CepOfi YpeTaHOBbIX KaYqYKOB. CEiHTe3 aJIaCTOMepOB

SynopsisGeneral information on the methods of lactone polymerization has been given. The method applied in this study for obtaining poly(c-caprolactone) with the use of sodium derivatives of ethanediol, diethylene glycol, 1,5-pentanediol, and 1,lO-decanediol has been discussed, and the results of the experiments have been given. The properties of cast urethane elastomers prepared from the obtained poly(c-caprolactone) have also been presented.

Fuels combustion, polluting the atmosphere is a side effect of an engines’ work. ncreasing ecological awareness has led to constant pursuit of disposing harmful substances properly. Catalytic converters (car catalysts), containing precious metals from the platinum group, including palladium, platinum and rhodium, have been commonly adopted for this purpose. These critical elements can be found in many raw materials used frequently throughout the economy. Therefore, it is economically viable to retrieve these elements from, among the others, spent catalysts, so they can be reused to manufacture new converters. In order to determine a possible cost of spent car catalyst, it is essential to use the analytical techniques to determine elemental content in any given sample. X-ray fluorescence spectroscopy (XRF) is an example of such a technique. It is nevertheless advisable to use a complementary procedure to confirm any results obtained. A cross-verification technique was developed using inductively coupled plasma mass pectrometry (ICP-MS). This procedure was verified using comparative studies, which confirmed its usefulness and correctness.

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