Effect of the chemical constitution of the side-chain on the formation and the structure of mesophases in some polysiloxanes

Comparative characterization of polymethylsiloxane hydrogel and silylated fumed silica and silica gel

“…Functionalized PMSs [19,20] are used for modification and functionalization of solid surfaces [21,22]. They are also used as supports for catalysts [23] or as polymer backbones for preparation of liquid crystalline polymers [24,25]. NMR investigations and dielectric relaxation measurements show a strong dependence of the mobility of polysiloxanes on the structure of side groups [26].…”

Design and Synthesis of Side‐Chain Liquid Crystal Polymers

“…In PAs and polymethacrylates, the methylene spacer length (carbon number) is 2, 6, and 11 in many cases because as synthetic materials, 2-chloroethanol, 6-chlororhexanol, and 11-bromoundecanol are comparatively easy to purchase. In general, the increase in spacer length reduces the glass transition temperature (P8-P10-x), as shown in Figure 11.14 [45][46][47][48][49]. On the other hand, the correlation between the spacer length and the isotropization temperature is unclear.…”

Novel oligocarbosilazanes bearing promesogenic end groups

“…In contrast, judging from DSC and microscopic studies, oligomers containing mesogen A (compounds A1, A2 and A3, Table 2) did not exhibit any mesomorphic properties. Although both starting mesogens exhibit LC properties in a free form [8,9], it was previously found that mesogen A, when attached as a side chain to polymers with relatively low molar ratio of functional units, produced materials with poor or even no LC properties [5,7,8]. Therefore, during the course of our research, we directed our attention to mesogen B which was reported to be more effective in systems with a low degree of functionalization [7,9].…”