000			01610nab a2200205 4500
005			20260520000927.0
008			260224s2011 xxu
245	0	0	_aApplication of gemini surfactants as diesel fuel wax dispersants
260			_a _b _cene./feb. 2011
270			_a01/04/2011 ; 01/04/2011
300			_a10 p. ; 162-171
520			_aTranscripción del resumen del autor. Gemini surfactants were synthesized and evaluated as wax dispersants (WDs) or wax antisettling additives (WASAs) in crude oil derived diesel. In combination with styrene-C18 methacrylate statistical copolymers as coadditives, aliphatic flexible (class A) and rigid aromatic spacer (class B) geminis with two or three ionic head groups having C18 chain length were investigated. The copolymers were prepared via a controlled radical polymerization technique, atom transfer radical polymerization (ATRP). Crystallization studies in crude diesel revealed a structure-activity relationship between the gemini surfactants in conjunction with the polymeric additives. The lower molecular weight polymeric additive together with the flexible spacer geminis decreased the cold filter plugging point (CFPP) by about 11 °C with efficiency decreasing with aromatic geminis. The higher molecular weight polymeric additive in combination with the rigid bifunctional aromatic gemini gave a CFPP of 12 °C.
581			_a1
773	0		_tEnergy & fuels _g25
942			_cARTICULO
100	1		_aMaithufi, M. Norah _945015
100	1		_aJoubert, Dawid Johannes _945016
100	1		_aKlumperman, Bert _945017
999			_c174389 _d174389