TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Thermic Behaviour of two Copolymers used as Viscosity Improvers for SAE 10W Mineral Oil
(Universitatea Bucureşti, Bd. Regina Elisabeta 4-12, 030018, Bucureşti, România e-mail: ioasta@yahoo.com)
Vol LX • No. 4/2008
Ioana Stanciu
Universitatea Bucureşti, Bd. Regina Elisabeta 4-12, 030018, Bucureşti, România
e-mail: ioasta@yahoo.com

 Keywords   Differential scanning calorimetry, glass transition temperatures, heat resistance

 Abstract
Differential scanning calorimetry was used to determine the glass transition temperatures of two copolymers (KELTAN 4200 ? a etilene-co-propilene copolymer and INFINEUM SV 260 ? a hydrogenated isoprene-co-styrene one) recommended as viscosity improvers, while TG and DTA to evaluate their heat resistance.

 Rezumat
Calorimetria dinamică diferenţială a fost metoda ultilizată pentru determinarea temperaturilor de vitrifiere ale copolmerilor(KELTAN 4200 ? polietilenă-polipropilenă şi INFINEUM SV 260 ? polizopren stiren-hidrogenat) recomandaţi ca modificatori de viscozitate pentru uleiul SAE 10W. Din curbele TG şi DTA a fost determinată rezistenţa termică a acestora.



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