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Liquid crystalline monomer, sterically

The photoinitiated polymerization of a sterically hindered semi-fluorinated monomer, which is characterized by a hindered radical chain propagation site, was followed both in an isotropic and a highly ordered smectic liquid crystalline phase. The polymerization rate is slower in the smectic phase than in the isotropic phase, presumably a result of a decrease in both the propagation and termination rate constants. The decrease in the propagation rate results in a very slow persistent increase in polymer molecular weight after the initiating light source is removed. Polymerization firom the smectic phase of the monomer proceeds in a non-equilibrium matrix. [Pg.54]

See other pages where Liquid crystalline monomer, sterically is mentioned: [Pg.227]    [Pg.2]    [Pg.3]    [Pg.98]    [Pg.202]    [Pg.101]    [Pg.35]    [Pg.1082]    [Pg.420]    [Pg.55]    [Pg.68]    [Pg.205]    [Pg.406]    [Pg.43]    [Pg.389]    [Pg.263]    [Pg.1545]    [Pg.26]    [Pg.2228]    [Pg.138]   


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Crystalline Monomer

Liquid crystalline monomers

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