Aromatic vinyl compound-ethylene copolymer and method for producing the same

摘要

An aromatic vinyl compound-ethylene copolymer having the following features: (1) an aromatic vinyl compound content is from 1 mol% to 99 mol%. (2) an aromatic vinyl compound unit-ethylene unit alternating structure has a stereoregularity having an isotactic diad index of at least 0.75; and (3) even after sufficiently subjecting to crystallization, a crystallinity derived from an aromatic vinyl compound-ethylene alternating structure is not observed.