Photoinitiated Polymerization of a Semifluorinated Liquid Crystalline Monomer Exhibiting a Reduced Rate in the Smectic Phase
Polymers and High Performance Materials
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 from the smectic phase of the monomer proceeds in a non-equilibrium matrix.
ACS Symposium Series
Hoyle, C. E.,
Mathias, L. J.,
(2000). Photoinitiated Polymerization of a Semifluorinated Liquid Crystalline Monomer Exhibiting a Reduced Rate in the Smectic Phase. ACS Symposium Series, 755, 54-74.
Available at: https://aquila.usm.edu/fac_pubs/16107