The Influence of the Molecular Weight of Poly(Ethylene Oxide) on the Hydrolytic Degradation and Physical Properties of Polycaprolactone Binary Blendsdoi:10.3390/macromol3030026Dalton, MauriceEbrahimi, FarnooshXu, HanGong, KeFehrenbach, GustavoFuenmayor, Evert...
The influence of the physical network of entangled molecules in molten, superhigh-molecular-weight poly(ethylene oxide) (PEO) on the formation and morphology of the crystals is described based on light and scanning electron microscopy, small-angle light scattering, and wide-angle X-ray diffraction....
US3425981 1965年2月12日 1969年2月4日 Union Carbide Corp Olefin polymer compositions containing ethylene oxide polymers having a molecular weight of from 100,000 to 10 millionUS3425981 * 1965年2月12日 1969年2月4日 Union Carbide Corp Olefin polymer compositions containing ethylene oxide polymers ...
Molecular dynamics simulations have been performed with chemically realistic coarse-grained potentials to assess the effects of molecular weight on the glass transition temperatures (Tg) of single-chain particle of poly(ethylene oxide) in a vacuum. It is found that all the long isolated chains form...
Finally, drug release tests were performed to investigate the release kinetics of the different systems in an aqueous environment at 37C. The drug release from the high molecular weight poly(ethylene oxide) is principally related to the material swelling rather than polymer dissolution, leading to ...
Crystallinity degrees exert influence on the stability of high molecular weight poly(ethylene oxide)s, POE's, in solid state. It was found that the degradation of these POE's is connected with an increase of crystallinity degrees. Samples being prepared under the terms of the strontium carbonate...
In this chapter, the structural changes in pristine ultrahigh molecular weight polyethylene (UHMWPE) and gamma irradiated UHMWPE/silane hybrids have been scrutinized, and an effort has been made to correlate this structural alteration with degradation activation energies. Fourier transform infrared (FTIR)...
Conversely, drug release from the low molecular weight poly(ethylene oxide) is strictly related to the polymer dissolution mechanism. The achievement of stationary conditions, in which the rate of swelling equals the rate of dissolution, ensures a constant release rate, even in the case of very ...
of cyclic P3HT were more pronounced for the smaller macrocycles. Keywords: cyclic polymer;poly(3-hexylthiophene);molecular weight dependence;oxidation;polaron;biradical;dication;cyclic voltammetry;UV–Vis–NIR spectroscopy;ESR spectroscopy 1. Introduction...
Molecular Weight of Substances Definition and molecular weight (molar mass) of some common substances. The molecular weight of a substance, also called the molar mass , M, is the mass of 1 mole of that substance, given in M gram. In the SI system the unit of M is [kg/kmol] and in...