| abstract |
[PROBLEMS] To provide: a norbornene compound addition polymer which has excellent heat resistance and suffers no decrease in the excellent transparency and mechanical properties even when exposed to high temperatures during molding, processing, or use; and a process for producing the polymer. n [MEANS FOR SOLVING PROBLEMS] The norbornene compound addition polymer comprises, as an essential ingredient, repeating structural units derived from a substituted norbornene compound monomer, wherein the total content of atoms of the transition metals in Group 10 of the Periodic Table, halogen atoms, phosphorus atoms, aluminum atoms, boron atoms, and sulfur atoms is 50 wt. ppm or lower. The process for producing a norbornene compound addition polymer comprises bringing a norbornene compound addition polymer comprising, as an essential ingredient, repeating structural units derived from a substituted norbornene compound monomer into contact with an ion-exchanging lamellar inorganic compound. |