https://arpi.unipi.it/bitstream/11568/798598/2/polacco%20798598.pdf

A review of the fundamentals of polymer-modified asphalts: Asphalt/polymer interactions and principles of compatibility

Influence of thermo-oxidative aging on chemical composition and physical properties of polymer modified bitumens

Thermal degradation of SBS in bitumen during storage: Influence of temperature, SBS concentration, polymer type and base bitumen

Statistical investigation on physical–mechanical properties of base and polymer modified bitumen using Artificial Neural Network

Effect of molecular structure and concentration of styrene-butadiene polymer on upper service temperature rheological properties of modified binders

The effect of a blend of styrene-butadiene-styrene and ethylene-vinyl acetate copolymers on the heat resistance of oxidized bitumen was examined. The structural and rheological properties of the modified bitumen were analyzed.

Thermal oxidation resistance of bitumen modified with styrene-butadiene-styrene and ethylene-vinyl acetate copolymers

The adsorption capacity on the interphase surfaces of solution / air and solution / mineral material of binary mixtures of anionic (alkylbenzenesulfonic acid and its sodium salt (ABSCNa)) and nonionic surfactants (Tween-80) was studied. It has been established that the adsorption interaction of binary mixtures of surfactants with the surface of quartz and dolomite is affected by the presence of potential-determining ions that activate the surface of mineral materials, the charge and hydration of the anionic antagonists, the nature of the intermolecular interactions between the surfactant-components of the mixture. It was shown that the ABSCNa / Tween-80 mixture, characterized by low adsorption capacity to the mineral materials under study and absence of interaction between the surfactant components of the mixture, has a maximum oil displacement capacity from the surface of dolomite and quartz.

/pdf/adsorption-capacity-of-binary-surfactants-mixtures-at-7am3jbq64b.pdf

Adsorption capacity of binary surfactants mixtures at solution/air and solution/mineral material interfaces

The possibility of modifying oxidized asphalt by performing polycondensation of maleic anhydride with aliphatic amines of various chemical structures in the dispersion medium was considered. The influence of the reactant structures and reaction conditions on the physicomechanical and structural-rheological properties of the polymer-modified asphalt was examined.

Synthesis of aliphatic polyamides in the dispersion medium of oxidized asphalt

Dependencies of the viscoelastic and thermodynamic properties of high-viscosity oil from the oil-gathering reservoir of the N-Korenevskoye and Denisovskoye fields on the degree of water cut and temperature have been established. Under the conditions of shear deformations and at comparable temperatures, the nature of the processes of structure formation of oil at a low degree of water cut is due to phase transitions of paraffins, which is consistent with the experimental data described in the literature for non-watered oils, indicating the identity of the nature of intermolecular interactions between non-watered oil and oil with a low degree of water cut. The maximum effect of the thermal method for reducing the viscosity of oil with a low degree of water cut can be achieved when it is heated to the paraffin melting point T m *, determined using the ln(η) = f (1/T) dependence. The peculiarity of the rheological behavior of high-water-cut oil is due to an increase in the energy of intermolecular interaction, which in the entire temperature range is practically comparable to E act1 of low-water cut oil at T &lt;T m *, which is associated with the formationn of invert emulsions stabilized by interphase layers of asphaltene molecules. It is shown that an increase in temperature and shear deformations contribute to a decrease in the values of the effective viscosity of low and high water cut oil; however, the destruction of their colloidal structure does not occur in the entire range investigated. The loss of aggregate and kinetic stability of high-viscosity watered oil is achieved in the presence of a surfactant composition based on Sorbital C-20 and a sodium salt of alkylbenzenesulfonic acid, which causes the desorption of “natural stabilizers” from the oil-water interface and, as a consequence, the coalescence of water droplets. 

Viscoelastic and thermodynamic properties of highviscosity oil with different water cut

Isothermal data of superficial tension of solutions of surfactant mixture and low-temperature nitrogen sorption of multidimensional porous silica received by template synthesis prove complementarity of its properties and properties of SAA micelles. The measured isotherms of gas sorption belong to IV Type inherent in mesoporous adsorbents. The BET specific surface area is 600–800 m 2 /g, and the Gurvich pore volume is 0.7–1.0 cm 3 /g. With increase in mole fraction of nonionic component these values decrease, the ordered texture of SiO 2 , characteristic of MCM-48 mesoporous molecular sieve, collapses, d 211 -spacing becomes < 3.31 nm, and NLDFT distribution is transformed from monomodal to polymodal one.

/pdf/template-synthesis-of-multidimensional-porous-silica-4z8i9b046t.pdf

Тemplate synthesis of multidimensional porous silica

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