Thermoreversible gels of polymers in recycled motor oil

Barral, María Soledad; Muñoz, Manuel López; Santamarı́a, Anton

doi:10.1002/1521-3900(200103)166:1<277::aid-masy277>3.0.co;2-b

Cited by 2 publications

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“…However, in the case of SBS/oil gels and ternary (1:1 SBS-EVA)/oil gels, this does not correspond to the actual gel-sol transition T gs since the procedure established by Winter et al, [27,28] which implies a frequency independent tan d at the transition temperature, is not fulfilled for this complex (microphase separated structure) system. [19] On the other hand, considering literature results for similar systems, [8,29] we assume that the origin of our EVA/oil binary gels lies in PE crystallites which act as thermoreversible crosslinks of the network at room temperature. For this system Winter's criterion is obeyed, with a relaxation exponent:…”

Section: Resultssupporting

confidence: 72%

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Ternary Gels of a Polymer Blend and a Recycled Oil: Their Use as Bitumen Modifiers

Barral

Santamarı́a

Peña

et al. 2003

Macro Materials & Eng

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A blend of random ethylene‐vinyl acetate copolymer (EVA) and triblock styrene‐butadiene‐styrene copolymer (SBS) was dissolved in a recycled engine oil to obtain ternary thermoreversible gels. As the temperature was increased, first a network associated with EVA disappeared, and a second one associated with SBS dominated, maintaining the elastic response of the system. The principal advantage of these ternary systems is that their mechanical properties and thermal stability are better than that of binary gels. These gels, made from waste, can be used as bitumen modifiers to obtain binders of improved properties and good stability, which are useful for road surfacing.Temperature sweeps of elastic modulus performed at a frequency of 1 Hz.magnified imageTemperature sweeps of elastic modulus performed at a frequency of 1 Hz.

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Section: Resultssupporting

confidence: 72%

“…[18,19] We have also investigated the rheology of polymer/bitumen blends. [20] In the present paper, we report on the dynamic viscoelastic results of ternary gels based on blends of EVA and SBS dissolved in a recycled engine oil.…”

Section: Introductionmentioning

confidence: 99%