Citation: . STUDY ON LIQUID CRYSTALLINITY OF POLY(N-VINYLCARBAZOLE)*[J]. Chinese Journal of Polymer Science, ;2002, 20(2): 155-159. shu

STUDY ON LIQUID CRYSTALLINITY OF POLY(N-VINYLCARBAZOLE)*

Received Date: 27 March 2001
Revised Date: 25 June 2001

The liquid crystallinity of poly(N-vinylcarbazole) was studied by using powder X-ray diffraction, polarized opticalmicroscopy, and differential scanning calorimetry. The results show that the lower molecular weight fractions of this polymerdo not form a liquid crystalline phase, while the samples of sufficiently high molecular weight do form a mesophase attemperatures above the glass transition. The lowest value of the degree of polymerization for PVK to form a stable liquid crystalline phase was found to be in the range of 150 to 200,significantly higher than the value of 50 for most conventional side chain liquid crystalline polymers.
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