High-viscosity crude oils from the Yablunivske field (Ukraine, Poltava region) have been studied. The were diluted with gas condensate to reduce viscosity, and then various demulsifiers added. It was established that it is expedient dilute oil heavy dehydrate PM-1441 brand A non-ionogenic demulsifier, based on block copolymers of ethylene propylene oxides. dewatering degree found be 95 %.

Block copolymers are increasingly being applied in areas such as transfection, membrane sealing, site-specific targeting, and bionanoengineering yet there is a relative paucity of assays available for simple, stable and reproducible colorimetric determination of copolymer concentration in solution. We have focused on improving the accuracy and reproducibility of a modified version of the Stewar...

Synthetic routes towards new conjugates of hydrophilic zinc(II) phthalocyanine (ZnPc) with poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (Pluronic P123) and poly(L-lactide) (PLLA), are described. The main semiproduct ZnPc was obtained by heating 4-nitrophthalimide with urea and zinc chloride, followed by the reduction step. Steglich esterification was used to synthesize tw...

Recently a novel crosslinkable and biodegradable copolymer poly(propylene fumarateco-caprolactone) (PPF-co-PCL) has been synthesized in our lab (Figure 1). By varying copolymer composition, controllable physical properties can be achieved to satisfy various needs in tissue engineering, particularly, bone and nerve regenerations. The physical properties of the copolymers have been extensively in...

This review presents some examples obtained by molecular techniques in the study of non-ionic reverse micelles of poly(ethylene oxide) type surfactants: tetraethylene glycol mono-ndodecyl ether (C12E4), Triton X-100, and triblok copolymers poly(ethylene oxide)-blockpoly(propylene oxide)-blockpoly(ethylene oxide) (L62 and L64 Pluronics). By using specific spectral parameters of spin, fluorescenc...

Various (AB)n and (ABAC)n segmented copolymers with hydrophilic hydrophobic segments are processed via melt electrowriting (MEW). Two different composed of bisurea poly(dimethyl siloxane) (PDMS) or poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide) (PPO-PEG-PPO) segments, while the amphiphilic consist in combination PDMS PPO-PEG-PPO ratios, explored. All copolymer compositions usi...