POLYMER WHICH IS POLYARYLENE HAVING ALICYCLIC SKELETON AND FLUORENE SKELETON IN MAIN CHAIN, PRODUCTION METHOD OF POLYMER, COMPOSITION, FILM, SUBSTRATE WITH FILM, OPTICAL ELEMENT, IMAGE DISPLAY DEVICE, COATING MATERIAL AND MOLDED BODY

To provide a polymer having excellent transparency, a high glass transition temperature and excellent weather resistance when formed into a molded article such as a film, a production method of the polymer, a composition, a film, a substrate with a film, an optical element, an image display device, a coating material and a molded body.SOLUTION: A polymer has two types of a structural unit (X) and a structural unit (Y) different from each other. The structural unit (X) represents a divalent group expressed by general formula (II), and the structural unit (Y) represents a divalent group expressed by a crosslinked alicyclic structure including an adamantane skeleton or a norbornane skeleton. In general formula (II), R1 and R2 each independently represent a hydrocarbon group having 1 to 30 carbon atoms which may have a substituent, and each p independently represents an integer of 0 to 3.SELECTED DRAWING: None 【課題】透明性に優れ、ガラス転移温度が高く、膜等の成形物としたときの耐候性に優れる重合体、重合体の製造方法、組成物、膜、膜付基材、光学素子、画像表示装置、被覆材料及び成形体を提供する。【解決手段】相異なる２種の構造単位（Ｘ）及び構造単位（Ｙ）を有する重合体。構造単位（Ｘ）は一般式（ＩＩ）で表される２価の基を表し、構造単位（Ｙ）は、アダマンタン骨格又はノルボルナン骨格を含む有橋脂環構造で表される２価の基を表し、一般式（ＩＩ）中、Ｒ１及びＲ２は、各々独立に、置換基を有していてもよい炭素数１〜３０の炭化水素基を表し、ｐは、夫々独立に０〜３の整数を表す。【選択図】なし