Molecular symmetry change of perfluoro-n-alkanes in 'Phase I' monitored by infrared spectroscopy
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Phase diagram of polytetrafluoroethylene (PTFE) comprises four regions. Phases II and IV are characterized by twisted perfluoroalkyl (Rf) chains having different twisting rate of 13/6 and 15/7, respectively, while Phase III is characterized by a planer trans-z... ...
