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- W20239863 abstract "Octaphenylcyclotetrasiloxane (OPCTS) was investigated by Keyes and Daniels [1], who concluded that this compound presents a plastic phase in the range between 188°C and 205°C during the heating process and before the transition to the isotropic liquid phases. They used differential thermal analysis to observe the appearance of this mesophase and of a solid-solid phase transition at %76°C. During the reverse process a supercooling effect was observed: the mesophase exists from 203°C to 155°C. The arguments in favour of the plastic crystal nature of the mesophase were the assumed globular shape of the molecule and the observed optical isotropy, which seemed to exclude a liquid crystal nature of the mesophase. In fact liquid crystals are in-general characterized by optical birefringence and by either rod-like or disc-like molecular shapes." @default.
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- W20239863 date "1980-01-01" @default.
- W20239863 modified "2023-09-24" @default.
- W20239863 title "X-Ray Diffraction Study of the Mesophase of Octaphenylcyclotetrasiloxane" @default.
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- W20239863 doi "https://doi.org/10.1007/978-3-642-67848-6_10" @default.
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