| 摘要 |
<p>A retardation film, formed by stretching a film comprising a norbornene-based ring-opening polymer containing a structural unit (A) represented by the following general formula (1):
[in the formula (1), n represents an integer any one of 0 and 1, X 1 represents any one of a group represented by a formula: -CH=CH- and a group represented by a formula: -CH 2 CH 2 -, R 1 , R 2 , R 3 , and R 4 , which may be the same or different, each represent any one of atoms and groups selected from the group consisting of: a hydrogen atom; halogen atoms; substituted or unsubstituted hydrocarbon groups, each of which may include at least one of linking group selected from the group consisting of an oxygen atom, a nitrogen atom, a sulfur atom, and a silicon atom, and which has a number of 1 to 30 carbon atoms; and polar groups, wavy lines a and b each represent a configuration of any one of an endo or an exo, and a wavy line c represents a configuration of any one of an endo or an exo.]; wherein a content percentage of a structural unit (A-1), in which the wavy line c represents an exo configuration, among the structural units (A) in a range from 35 mol% to 100 mol%.</p> |
