Abstract
The photoinitiated bulk polymn. of liq. cryst. thiolene monomers (having a mercapto group at one end and an olefinic bond at the other) based on a Ph benzoate core was investigated and the structure of the corresponding polymers analyzed. We show that polymn. occurs substantially in bulk, and can be initiated on demand by UV irradn. The liq. cryst. thiolene polymers exhibit a nematic mesophase, and the mol. wt., mol. wt. distribution and overall conversion are characteristic for polymers obtained by a step-growth polymn. Using NMR spectroscopy, we show that anti-Markovnikov structures are predominantly formed, with a small fraction of the structures displaying different configurations that can be attributed to thiol olefin addn.-cooxidn. processes or to homopolymn. of the olefinic moiety. The conversions of the thiol and vinyl groups were monitored using time-resolved Raman spectroscopy and dissimilar partial reaction rates were obsd. [on SciFinder (R)]
Original language | English |
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Pages (from-to) | 8962-8968 |
Number of pages | 7 |
Journal | Macromolecules |
Volume | 35 |
Issue number | 24 |
DOIs | |
Publication status | Published - 2002 |