Synthesis and photopolymerization of a liquid-crystalline diepoxide

Direct mapping of local director field of nematic liquid crystals at the nanoscale

“…Together with the strong dipole-dipole intermolecular interactions, our LC molecules can lock in position effectively without altering the field direction during polymerization. Closely related are earlier studies of cationic photopolymerization of LC diepoxides (40,41), which show that the NLC phase is maintained in the densely crosslinked network-in contrast to that from radical polymerization of diacrylates. It was noted, however, that unintentional heating by the high-intensity UV light could realign the mesogens, thus increasing the order parameter after curing (41).…”

Effect of the network structure on thermal and mechanical properties of mesogenic epoxy resin cured with aromatic amine

“…5. On the other hand, the suppression of the chain motion was not observed in the TEDDM-cured Many types of mesogenic epoxy resins, e.g., biphenol-type, 4 stilbene-type, 5-8 phenylbenzoatesystem, because the large branches, such as ethyl groups, should prevent the orientation of the mestype, [9][10][11][12] and azine-type 13 have been reported in the field of high-performance network polymers. ogenic groups in the cured mesogenic epoxy resin.…”

“…In the field of epoxy fact that the mesogenic epoxy resins lose their thermosets, new types of epoxy resins which conliquid crystallinity with the progress of curing tain the mesogenic groups in their backbone, such was also reported. 10,14 We have also investigated as biphenol-type, [1][2][3][4] stilbene-type, [5][6][7][8] phenylbenthe thermal and mechanical properties of an epzoate-type, [9][10][11][12] and azine-type 13 resins, have been oxy resin which includes the biphenol group as a reported of both theoretical and practical interest. mesogenic group.…”

Liquid crystalline photoactive hyperbranched and linear benzylidene polyester with terminal epoxy and pendant hydroxyl groups

“…27,28 They are highly promising polymeric materials as the oriented liquid crystal networks can be used as an optical compensation film for a liquid crystal display. 29 Fabrication of uniaxially oriented nematic networks from diepoxy monomer in presence of photointiator was demonstrated by Broer et al 30 A large number of reports are available on synthesis of liquid crystalline epoxy polymers with variety of nonphotoactive mesogens [31][32][33][34][35] and photoactive mesogens [36][37][38][39][40] due to their potential utilization in the development of magnetic/ electric field or light induced liquid crystalline networks formation.…”