Reactions catalyzed within inorganic and organic materials and at electrochemical interfaces commonly occur at high coverage and in condensed media, causing turnover rates to depend strongly on interfacial structure and composition, 540-37-4, Name is 4-Iodoaniline, SMILES is NC1=CC=C(I)C=C1, in an article , author is Hasegawa, Masatoshi, once mentioned of 540-37-4, SDS of cas: 540-37-4.
Polyimides Containing Benzoxazole Units and Their Liquid-Crystalline Behavior
Herein, we report the liquid-crystalline behavior of polyimides (PIs) containing benzoxazole (BO) units and their model compounds, and provide fundamental information in relation to their potential as heat-releasing materials. A series of BO-containing tetracarboxylic dianhydrides were synthesized using two bis(o-aminophenol)s as starting materials, namely, 3,3-dihydroxy-4,4-diaminobiphenyl (p-HAB) and 4,6-diaminoresorcinol (DAR). When a p-HAB-type BO-containing tetracarboxylic dianhydride with ester linkages was combined with a siloxanediamine (amine equivalent: 430 g/mol), the resulting PI barely exhibited optical anisotropy with an unclear and undeveloped texture with the assistance of continuous shear stimulus. On the other hand, the combination of DAR-type BO-containing tetracarboxylic dianhydride with ester linkages and the siloxanediamine led to the formation of an optically anisotropic texture with particle-like domains in the heating process over a wide temperature range, although continuous shear stimulus in the molten state was still required for this system. The thermal diffusivity of BO-containing PI films quenched from their liquid-crystalline states is also reported.
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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem