Liquid Crystalline Side Chain Polymers Derived From Poly-acrylate, Poly-methyacrylate and Poly-α-chloroacrylate

Biosensor utilizing a liquid crystal/water interface functionalized with poly(4-cyanobiphenyl-4′-oxyundecylacrylate-b-((2-dimethyl amino) ethyl methacrylate))

“…An LC monomer, LC11, was prepared following a previously reported procedure [36,37]. LC11 monomers were synthesized through the etherification of 4-cyano-4 -hydroxybiphenyl (4.02 g, 20.62 mmol) and 11-bromo-1-undecanol (5.23 g, 20.80 mmol).…”

Liquid Crystalline Polymers by Metathesis Polymerization

“…For a shorter spacer length (n=3), no induced effect was observed up to 20 T, which can be explained by the reduced mobility of the mesogenic moieties, resulting in reduced rotation towards the field director. 56 G. Trimmel et al Recently, the orientation behavior of poly-(IV-5) was compared to both poly-(IV-4) and a statistical copolymer poly-IV-5-COEN (COEN=cyclooctene) [51]. The experiments showed that, compared to poly-(IV-5), samples of poly-(IV-5-COEN) were easier to orientate, a finding that was attributed to the more flexible chain.…”

“…Figure 8 shows some examples of backbone structures bearing the cyanobiphenyl-moiety that have been reported in literature. The above-mentioned ROMP-derived polymers poly-(II-n) [39], poly-(IV-n) [42,47], poly-(VI-n) [41], and poly-(VII-n) [53] will be compared with each other and with acrylate-based [56][57][58][59], siloxanebased [60] and vinylcyclopropane-based systems [61]. The detected mesophases and their transition temperatures are summarized in Table 6.…”

Synthesis and characterization of polymaleimides containing 4-cyanobiphenyl-based side groups for nonlinear optical applications

“…It is also quite clear that long flexible spacers move the bulky mesogenic groups farther away from the polymer backbone, which causes less hindrance to main-chain motions. The glass transition of PM n s is strongly depressed in comparison to that of polysiloxanes, 50 polyvinylethers, 20,48,51 polyacrylates, 24 polymethacrylates, 50 and polynorbornenes, 27,28 in which the same 4-cyanobiphenyl-based mesogenic group is attached to the polymer backbones through spacers of 2-12 methylenic units. As the length of the spacer increases from two to eight methylenic units, T g changes from 150 to 43°C for the functionalized polymaleimides investigated, while it decreases by only 45-55°C in the case of the analogs just mentioned (Table V).…”

“…This chromophore is an excellent candidate for blue conversion because it exhibits a wide transparency range with an optical absorption cutoff at about 340 nm. It has been shown that it possesses strong enough mesogenic properties itself to allow the preparation of SCLCPs when attached to different backbones including, in the order of decreasing flexibility, polysiloxane, 18,19 polyvinylether, 20 polyepichlorohydrin, 21 polybischloromethyloxetane, 22,23 polyacrylate, 24,25 polymethacrylate, 25 polyparachloromethylstyrene, 26 and polynorbornene. 27,28 Paraffinic flexible spacers were introduced to study the influence of spacer length on phase transitions.…”