– A tensile blob construction for branched structures is used to explain structural sizes larger than the strand length, as observed in neutron scattering data from equilibrium swollen networks. Under this model, equilibrium swollen networks display a base structural size, the “gel tensile blob” size, ξ, that follows the scaling relationship ξ ∼ l/(1/2−χ)P , where l is the monomer length, χ is ...

Using a vibrating tube density meter, the densities and speeds of sound 1,2-dichloroethane, methyl tert-butyl ether, diisopropyl diethyl ether were measured at T = 278.15 to 333.15 K atmospheric pressure. The three binary mixtures (1,2-dichloroethane + ethers) also experimentally determined. Redlich–Kister data treatment partial molar volume applied excess mixtures. To conclude, Prigogine–Flory...

Temperature scanning stress relaxation (TSSR) measurement of peroxide vulcanized polymer blends polypropylene (PP) and ultrahigh molecular-EPDM (UHM-EPDM) rubber has been performed to study the thermomechanical behavior thermoplastic vulcanizates (TPVs). Co-agents play crucial roles in enhancement properties TPVs. Different types co-agents (Triallyl cyanurate-TAC; N, N-m-phenylene-dimaleimide-H...

Obecnie obserwowane są znaczne zmiany klimatu w Arktyce i Antarktyce. Wzrost średniej temperatury powietrza latach 1979-2019 był trzykrotnie wyższy niż średnia globalna. W Antarktyce największe ocieplenie występuje rejonie Półwyspu Antarktycznego. Polska również uczestniczy monitorowaniu warunków pogodowych na południowym Spitsbergenie Stacji im. S. Siedleckiego Hornsundzie oraz H. Arctowskiego...

2014 The phase equilibrium in polymer-solvent systems has been described in terms of the Landau-Ginzburg-Wilson model. The scaling law for the coexistence curve which has been derived in the present article is in good agreement with the experimental data. The prediction of the present theory that the scaling region narrows with increasing degree of polymerization, is consistent with the experim...

The rational development of sustainable polymeric materials demands tunable properties using mixtures polymers with chemical variations. At the same time, sheer number potential variations and combinations makes experimentally or numerically studying every new mixture impractical. A direct predictive tool quantifying how material change when molecular features provides a less time- resource-con...

Proteins, chain molecules of amino acids, behave in ways which are similar to each other yet quite distinct from standard compact polymers. We demonstrate that the Flory theorem, derived for polymer melts, holds for compact protein native state structures and is not incompatible with the existence of structured building blocks such as alpha helices and beta strands. We present a discussion on h...