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 | | | | | | | | | | MPa1/2 | 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 |
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Hansen reports a value of 20.4 MPa1/2. 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.
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