High strength disclinations in the nematic and smectic states of 2,5-bis(4-alkoxybenzoyloxy)-p-benzoquinones
writer：Li L, Liu RG, Zhang SY, Li ZF
keywords：LIQUID-CRYSTALS; SCHLIEREN TEXTURE; POLYMERS; DEFECTS
source：期刊
specific source：Liquid Crystals 2003, 30(2), 259-263
Issue time：2003年
High strength disclinations were observed in both nematic and smectic phases exhibited by members of the 2,5-bis(4-alkoxybenzoyloxy)-p-benzoquinone series, beyond 4-n-pentoxy. The shorter members of the series show only a nematic mesophase, the highest members only a smectic mesophase, while intermediate members exhibit both types of mesophase. These high strength disclinations seen in a single component system are very stable due to energy dispersion and the high viscosity of the smectic state. All the high strength disclinations are negative in sign.