Micro-phase-separation behavior of amphiphilic polyurethanes involving poly(ethylene oxide) and poly(tetramethylene oxide)

2003 ◽  
Vol 41 (20) ◽  
pp. 2365-2374 ◽  
Author(s):  
Daewon Lee ◽  
Seung-Heon Lee ◽  
Sangcheol Kim ◽  
Kookheon Char ◽  
Jae Hyung Park ◽  
...  
Keyword(s):  
Phase Separation ◽  
Ethylene Oxide ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Phase Separation Behavior ◽  
Separation Behavior ◽  
Tetramethylene Oxide

Mesoscopic Dynamic Simulations of Poly (Methyl Methacrylate) and Poly (Ethylene Oxide) Blends

2014 ◽  
Vol 1033-1034 ◽  
pp. 491-495
Author(s):  
Min Zhang ◽  
Guo Fang Zhang ◽  
Yu Xi Jia
Keyword(s):  
Free Energy ◽  
Phase Separation ◽  
Ethylene Oxide ◽  
Methyl Methacrylate ◽  
Order Parameters ◽  
Density Profiles ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Phase Separation Behavior ◽  
Separation Behavior

In this work, we use Mesoscopic Dynamic (MesoDyn) density function simulation to study the compatibility of polymer blends. The mesoscale model for Poly (methyl methacrylate) (PMMA) and Poly (ethylene oxide) (PEO) were set up. The free energy, enthalpy, entropy, order parameters and density profiles were got by the simulation. The results showed that the free energy density keeps constant negative value and the order parameters is much less than 0.1. And phase separation behavior was not observed during the whole simulation time. Using density profiles, the kinetics of phase separation was examined and the phase separation behavior. These indicates that PMMA and PEO is miscible.

scholarly journals Microstructure and Mechanical/Elastic Performance of Biobased Poly (Butylene Furanoate)–Block–Poly (Ethylene Oxide) Copolymers: Effect of the Flexible Segment Length

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 271 ◽  
Author(s):  
Magdalena Kwiatkowska ◽  
Inez Kowalczyk ◽  
Konrad Kwiatkowski ◽  
Agata Zubkiewicz
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
Ethylene Oxide ◽  
Mechanical Performance ◽  
Elastic Recovery ◽  
Segment Length ◽  
Poly Ethylene Oxide ◽  
Injection Molded ◽  
Poly Ethylene ◽  
Flexible Segment

The aim of this paper is to extend knowledge on biobased poly(butylene furanoate)–block–poly (ethylene oxide) (PBF-b-PEO) copolymers’ performance by studying the effect of the PEO segment’s molecular weight on the microstructure and materials behavior. As crystallization ability of PEO depends on its molecular weight, the idea was to use two PEO segment lengths, expecting that the longer one would be able to crystallize affecting the phase separation in copolymers, thus affecting their mechanical performance, including elasticity. Two series of PBF-block-PEOs with the PEO segments of 1000 and 2000 g/mol and different PBF/PEO segment ratios were synthesized by polycondensation in melt, injection molded to confirm their processability, and subjected to characterization by NMR, FTIR, DSC, DMTA, WAXS, TGA, and mechanical parameters. Indeed, the PEO2000 segment not only supported the crystallization of the PBF segments in copolymers, but at contents at least 50 wt % is getting crystallizable in the low temperature range, which results in the microstructure development and affects the mechanical properties. While the improvement in the phase separation slightly reduces the copolymers’ ability to deformation, it is beneficial for the elastic recovery of the materials. The investigations were performed on the injection molded samples reflecting the macroscopic properties of the bulk materials.

Analysis of phase separation behaviour in the system poly(ethylene oxide)-water

1987 ◽  
Vol 29 (3) ◽  
pp. 709-714 ◽  
Author(s):  
V.I Klenin ◽  
N.K Kolnibolotchuk ◽  
N.A Solonina ◽  
Yu.F Ivanyuta ◽  
N.I Panina
Keyword(s):  
Phase Separation ◽  
Ethylene Oxide ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

LCST-type liquid–liquid phase separation behaviour of poly(ethylene oxide) derivatives in an ionic liquid

2008 ◽  
pp. 4939 ◽  
Author(s):  
Ryohei Tsuda ◽  
Koichi Kodama ◽  
Takeshi Ueki ◽  
Hisashi Kokubo ◽  
Shin-ichiro Imabayashi ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Phase Separation ◽  
Liquid Phase ◽  
Ethylene Oxide ◽  
Liquid Phase Separation ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Liquid Liquid Phase Separation
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