Could you explain crystal (28.5oCNematic) 74oC Isotropic and K 30oC SmB (26oC) N 54.7oC I?This is monotropic transition, K:crystal, SmB:smectic B; N: Nematic; I: isotropic
Sir, This is phase transition with respect to temperature. If we observe, I put brackets for certain phase transition temperatures. Here Phase phase transition will not occur in the same way during cooling and heating. So, I would like to know the the path while cooling and heating in the above two above mentioned samples.
From what you wrote, it appears that these are phase transition data for two compounds. I am not sure why you have the parentheses in the first case (a bit more information would make this clearer) but I am guessing that the authors are reporting that the transition from crystalline to nematic either only occurs on heating (monotropic) or that it only occurs in the first heating cycle. The latter is a possibility since many liquid crystalline materials can show a unique series of transitions on the initial heating cycle since the crystallization from the melt and solution can lead to different structures. The second set of data again seems to show data that differs from a heating and cooling. I might interpret as heating gives K to SmB at 30 followed by melt to isotropic at 54.7 and then on cooling the transition is isotropic to nematic and then crystalline. To be honest I am guessing a bit here since the information is not complete as given. Perhaps I could interpret it better if I had more information, including the full text.
Thank you Prof. Robert E Bachman and Wei Wei for your kind reply.
I am sorry in my late response.
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