Photoinitiated polymerization of a semifluorinated liquid crystalline monomer exhibiting a reduced rate in the smectic phase

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作者：
Hoyle, C.E. [1 ]
Mathias, L.J. [1 ]
Jariwala, C. [1 ]
Sheng, D. [1 ]
Sundell, P.E. [1 ]
机构：
[1] Department of Polymer Science, University of Southern Mississippi, Box 10076, Hattiesburg, MS 39406-0076, United States
来源：
ACS Symposium Series | 2000年 / 755卷
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摘要：
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.
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页码：54 / 74
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