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