PURPOSE: To obtain a polymer useful as various molded articles, having high glass transition temperature, excellent heat resistance, improved transparency, chemical resistance, dielectric properties and mechanical properties, by (co) polymerizing a specific bulky monomer optionally with ethylene.
CONSTITUTION: A novel polymer which is a polymer comprising 4.9,5.8- dimethano-3a,4,4a,5,8,8a,9,9a-octahydro-1H-benzoindene (DMOB for short) and, if necessary, ethylene, having a composition ratio (molar ratio) of ethylene/ DMOB monomer component of 95/5W0/100, the DMOB unit exhibiting structure mainly shown by the formula and 0.005W20dl/g intrinsic viscosity [η] measured in toluene at 25°C. The monomer component may contain ≤50mol.% based on the DMOB unit of a third copolymerizable monomer component (e.g. propylene or norbornene).
OSHIMA MASAYOSHI
NATSUUME YOSHIO
