Polar rubbery membranes structure

Structure/Property Characteristics of Polar Rubbery Membranes for Carbon Dioxide Removal... [Pg.929]

STRUCTURE/PROPERTY CHARACTERISTICS OF POLAR RUBBERY MEMBRANES... [Pg.930]

STRUCTURE/PROPERTY CHARACTERISTICS OF POLAR RUBBERY MEMBRANES TABLE 35.1 Chemical Structures of the Cross-linker and Monomers Used in This Study... [Pg.936]

The importance of regularity, polarity, and chain stiffness becomes apparent in the uses of polyethers. Of the common polyethers, only polyformaldehyde, poly(ethylene oxide), and the polymer based on 2,2-dichloromethylpropylene-1,3-oxide are crystalline. Since poly(ethylene oxide) is water soluble, only the remaining two polyethers are useful structural materials. Phenoxy, phenylene oxide, and sulfone polymers are useful thermoplastics because the chain stiffness contributed by aromatic rings in the backbone raises 7 well above room temperature. Polysulfones are used in the manufacture of membranes for gas separations (Section 13.6). The aliphatic ether backbone is more conducive to low 7 s that are suitable for rubbery applications. Fully cured epoxy resins are dimensionally stable network polymers. Low-molecular-weight polymers of ethylene oxide [often abbreviated as PEG for poly(ethylene glycol)] are often listed as ingredients of... [Pg.693]

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