Mesomorphic glass

Note 4 A vitrified substance in the mesomorphic state is called a mesomorphic glass and is obtained, for example, by rapid quenching or by crosslinking. 

ECTSS-1 and ECTSS-2, they are in the mesomorphous state below the isotropization temperature, Tiso, transiting into mesomorphous glass below glass transition temperature, 7g. 

Klimiisheva GV, Garbovsldi Y, Bugaichuk S et al (2009) Novel nanocomposite materials based on mesomorphic glasses of metal alkanoates structure and nonUnear optical properties. High Eneig Chem 43 532-535... 

Similarly, the functionalization of the GO, G1 and G2 PPI dendrimers with cholesteryl groups through carbamate linkage appeared to be the right strategy to induce mesomorphism in these systems [206]. They all exhibit a glass transition between 63 and 78 °C, and after a rich thermal history, all melt into birefringent fluids at ca. 149-162 °C, identified as a SmA phase. GO then clears at 170 °C, whereas both G1 and G2 clear at 210 °C. 

A mixed [60]fullerene-ferrocene dendrimer (Fig. 65) was also found to be mesomorphic, showing a room temperature smectic A phase which cleared at 157 °C (no glass transition temperature was detected) [294,295]. The mesophase was only slightly destabilized upon the addition of Ceo when com-... 

Pc macrocycle. Some of them are mesomorphic and show a Colh phase (Fig. 79 I-Gl G 115 Coin 270 I II-Gl G <-20 Colh > 320 h H-G2 G 115 Colh 250 I II-G3 94 Colh 108 I) for which the structure of the columnar mesophase is frozen at room temperature (anisotropic glasses). The functionalization of these dendrons in the 3 and 5 position of the terminal rings by oligo(ethyleneoxy) chains (0CH2CH2)30CH3, and their subsequent grafting onto the phthalocyanine of type I (Fig. 79) led to amphiphiUc materials [333]. In concentrated ethanol solutions ( 20-40% by mass), the compound with the fimctionaUzed G1 dendron behaves as a discotic amphiphUe forming a coliunnar nematic lyotropic phase. In addition, it possesses a columnar mesophase stable from room temperature up to 260 °C. Systems of type III are not mesomorphic. 

Isotactic polypropylene crystallizes below 350 K on quick cooling from the melt increasingly as condis glass This conformationally disordered polypropylene had first been described as bdng smectic mesomorphic or paracrystalline ... 

The cholesteric material was then doped with a small quantity of a non-mesomorphic epoxy compound, Lixon, which lowered the cholesteric-isotropic transition temperature and gave rise to a broad two-phase region. Because the glass plates have greater affinity for Lixon than for the liquid crystal compound, the cholesteric drops were surrounded on all sides by the isotropic phase. With thick cells, spherical drops with the characteristic /-line of strength 2 were formed (fig. 4.4.2). In thin cells ( 8 pm thick) flattened drops were obtained in which the central portion... 

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