Polymeric material for liquid crystal/polymer composite film, record display medium, and use thereof

A polymeric material for a liquid crystal/polymer composite film comprising a liquid crystal present in a polymer matrix, wherein the polymeric material comprises a polymer having repeating units represented by the following general formula (1):

• ##STR40## wherein R.sup.1 and R.sup.6 may be the same or different and represent a hydrocarbon group optionally having a hetero atom and/or a substituent;
• and wherein the polymeric material is incompatible with the liquid crystal, causes phase separation from the liquid crystal and is not dyable with a dichroic dye.

A record display medium comprising a liquid crystal/polymer composite film comprising a liquid crystal present in a polymer matrix, wherein when a value obtained by differentiating a display density value for the liquid crystal/polymer composite film with respect to a storage temperature value is defined as a function, the function has a peak, with the difference between the temperature at which the maximum value is provided and the phase transition temperature of the liquid crystal being not more than 20.degree. C., and the function having a half value width of not more than 10.degree. C.

A liquid crystal/polymer composite film comprising a liquid crystal present in a polymer matrix, wherein the polymer matrix comprises a polymeric material having a glass transition temperature of 150.degree. C. to 274.4.degree. C., and

• wherein the polymeric material comprises a polymer having repeating units represented by the following general formula (1):
• ##STR41## wherein R.sup.1 and R.sup.6 may be the same or different and represent a hydrocarbon group optionally having a hetero atom and/or a substituent.

A liquid crystal/polymer composite film comprising a liquid crystal present in a polymer matrix, wherein the polymeric material comprises a polymer having repeating units represented by the following general formula (1):

• ##STR47## wherein R.sup.1 and R.sup.6 may be the same or different and represent a hydrocarbon group optionally having a hetero atom and/or a substituent;
• and wherein the polymer matrix comprises a polymeric material which is incompatible with the liquid crystal, causes phase separation from the liquid crystal and is not dyable with a dichroic dye.

A liquid crystal/polymer composite film comprising a liquid crystal present in a matrix, wherein when a value obtained by differentiating a display density value for the liquid crystal/polymer composite film with respect to a storage temperature value is defined as a function, the function has a peak, with the difference between the temperature at which the maximum value is provided and the phase transition temperature of the liquid crystal being not more than 20.degree. C., and the function having a half width of not more than 10.degree. C.