000			01512nab a2200181 4500
005			20260520001747.0
008			260224s2009 xxu
245	0	0	_aStyrene-maleic anhidride copolymer esters as flow improvers of waxy crude oil
260			_a _b _cabril. 2009
270			_a2009-05-11 ; 2009-05-11
300			_a8 p. ; 139-146
520			_aResumen publicado por el autor: Four comb-like copolymers derived from styrene-maleic anhydride copolymer were prepared and characterized by FTIR, 1H-NMR and elemental analysis. The molecular weight was determined using GPC and their intrinsic viscosity was measured. The prepared polymers were investigated as pour point depressants and flow improvers for waxy crude oil and it was found that, the maximum depression was obtained by the sample that has long branch chain (PPD4) from 27 °C to - 3 °C ( PP = 30 °C, at 10,000 ppm), while the minimum depression was exhibited by short branch chain, PPD1 ( PP = 21 °C) at the same conditions. The effect of these polymers on the rheology and flow properties of Qarun waxy crude oil was investigated. It was found that the Bingham yield value (tß) decreased from 6.0 Pa s to 0.5 Pa s for PPD4 at 27 °C and 10,000 ppm. The dynamic viscosity also decreased from 110 mPa s to 24 mPa s for the same sample and the same conditions.
581			_a3-4
773	0		_tJournal of Petroleum Science & Engineering _g65
942			_cARTICULO
100	1		_aAl-Sabagh, A. M. _941120
999			_c169718 _d169718