Carbonization and liquid-crystal (mesophase) development. 5. Importance of eutectic zones formed from nematic liquid crystals

✍ Scribed by Harry Marsh; Gail Hermon; Christopher Cornford

• Book ID: 103090398
• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 440 KB
• Volume: 53
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(74)90004-0

✦ Synopsis

The development of anisotropy in carbons arises from growth of nematic liquid crystals from the plastic phase of carbonization systems. Mixed, nematic liquid crystals form eutectic zones stable at lower temperatures than the single components. This phenomenon may have relevance to co-carbonization of mixtures of organic compounds and to coal blending procedures. A lowering of the temperature of onset of anisotropy may be beneficial to both graphite and coke quality. In the co-carbonization of carbarole and pyromellitic dianhydride to form anisotropic carbons, such a concept may be relevant. However, in the co-carbonization of two coals, although some lowering occurred in the temperature of formation of anisotropy, other interfacial phenomena are observed.