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Stiff substituents, polyesters

The solution behavior has been significantly enhanced by the same structural modifications as reported previously for aromatic LC polyesters. For example poly-(p-phenylene terephthalamide) has been modified by bulky, stiff substituents [32], flexible alkyl side chains [33], the incorporation of kinked and double kinked comonomers, and comonomers of different lengths [34], as well as the use of noncoplanar bipheny-lene monomers [35]. To develop high performance materials, modifications that increase the solubility while maintaining the rod-like character, high glass transition temperatures, and the temperature stability are of particular interest. The solubility and the chain stiffness are critical factors in achieving lyotropic solutions. [Pg.22]

See other pages where Stiff substituents, polyesters is mentioned: [Pg.38]    [Pg.19]    [Pg.20]    [Pg.626]    [Pg.593]    [Pg.380]    [Pg.2081]    [Pg.2082]   
See also in sourсe #XX -- [ Pg.3 , Pg.17 ]

See also in sourсe #XX -- [ Pg.3 , Pg.17 ]



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