The determination of orientational order in liquid crystalline melts of polydecamethlyne terephthaloyl-dioyxbenzoate

Practical considerations in the study of main-chain thermotropic liquid-crystalline polymers by vibrational microscopy

“…These include X-ray diffraction (widely used for TLCPs), birefringence, polarised fluorescence and polarised vibrational spectroscopy. Of the latter, IR dichroism is by far the most frequently used technique, and has been widely applied to determine bulk orientational order parameters in "combed" and drawn TCLPs [3,7]. and process oriented materials [6,8,9,11].…”

“…These can be essentially divided into two groups: orientational order [3][4][5][6][7][8][9][10][11], and thermotropic behaviour [5,[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. With respect to the thermotropic properties, both temperature variable IR [6,13,15,18,[22][23][24][25][26] and Raman [19,24] spectroscopy have been employed, and clear correlations with the transition temperatures observed by TOA and DSC have been reported.…”