International Scholarly Research Notices

Research Article

Biodiesel as a Plasticizer of a SBR-Based Tire Tread Formulation

Table 3

Difference between the solubility parameter of the plasticizer and the solubility parameter of the rubber.


	in
	MPa^1/2	EPDM and IIR	NR	BR	SBR-20	SBR-40	PS	NITRILE-20	NITRILE-30

Paraffinic oil (this work)		−1.9	−2.3	*−2.9*	-3.2	−3.5	−4.5	−5.2	−6.4
Naphthenic oil (this work)				−1.4	−1.7	−2.0	−3.0	−3.7	−4.9
Aromatic oil (this work)		1.2					−1.4	*−2.1*	−3.3
Diisooctyl adipate [2]		1.7	1.3					−1.6	*−2.8*
Dioctyl sebacate [2]		1.7	1.3					−1.6	*−2.8*
Diethylhexyl phthalate [2]		*2.1*	1.7	1.1				−1.2	*−2.4*
Dioctyl phthalate [6]		*2.2*	1.8	1.2				−1.1	*−2.3*
Diethylhexyl phthalate [6]		*2.9*	2.5	1.9	1.6	1.3			−1.6
Dibutyl phthalate [2]		3.1	*2.7*		1.8	1.5			−1.4

Olive oil [3]							−1.8	*−2.5*	−3.7
Soybean oil [3]					−1.2	−1.5	*−2.5*	−3.2	−4.4
Sunflower oil [3]						−1.0	*−2.0*	*−2.7*	−3.9
Peanut oil [3]				−1.0	−1.3	−1.6	*−2.6*	−3.3	−4.5
Lineseed oil [3]					−1.0	−1.3	*−2.3*	−3.0	−4.2
Brassica oil [3]							−1.8	*−2.5*	−3.7
Castor oil [3]*		*2.2*	1.8					−1.1	−2.3

Methyl erucate (this work)						−1.1	*−2.1*	*−2.8*	−4.0
Methyl oleate (this work)						−1.0	−2.0	*−2.7*	−3.9
Methyl linoleate (this work)						−1.1	*−2.1*	*−2.8*	−4.0
Methyl stearate (this work)						−1.0	−2.0	*−2.7*	−3.9
Methyl palmitate (this work)						−1.1	*−2.1*	*−2.8*	−4.0
Biodiesel (this work)						−1.1	*−2.1*	*−2.8*	−4.0
Biodiesel [7]		1.5	1.1				−1.1	−1.8	−3.0

Hansen reports a value of 20.4 MPa^1/2.
EPDM: ethylene/propylene/diene rubber; IIR: butyl rubber; NR: natural rubber (polyisoprene); BR: polybutadiene; SBR-20: styrene/butadiene copolymer 20% styrene; SBR-40: styrene/butadiene copolymer 40% styrene; PS: polystyrene; NITRILE-20: acrylonitrile/butadiene copolymer 20% acrylonitrile; NITRILE-30: acrylonitrile/butadiene copolymer 30% acrylonitrile.
Bold font: .
Italic font: .
Bold italic font: .
Underline font: .