GAS BARRIER POLYMER MATERIAL, PRODUCTION METHOD THEREOF, AND PACKAGING MATERIAL USING THE GAS BARRIER POLYMER MATERIAL

摘要

Provision of a gas barrier polymer material capable of expressing sufficiently high oxygen barrier property even without addition of a nucleating agent and the like, and a production method capable of producing the same with high reproducibility, as well as a packaging material using such a gas barrier polymer material.The gas barrier polymer material of the present invention comprises a hydroxyl group-containing gas barrier polymer mainly comprising a structural unit represented by the following formula (I): wherein m and n are each an integer of 0 to 10; X<SUP>1</SUP> and X<SUP>2</SUP> are each a hydrogen atom, a hydroxyl group or a functional group convertible to a hydroxyl group, provided that the total of m and n is not less than 1 and at least one of X<SUP>1</SUP> and X<SUP>2</SUP> is a hydroxyl group or a functional group convertible to a hydroxyl group; R<SUP>1</SUP>, R<SUP>2</SUP> and R<SUP>3</SUP> are each a hydrogen atom, a hydroxyl group, a functional group convertible to a hydroxyl group, an alkyl group, an aryl group, an aralkyl group or a heteroaryl group; and R<SUP>1</SUP>, R<SUP>2</SUP>, R<SUP>3</SUP>, X<SUP>1</SUP> and X<SUP>2</SUP> present in plurality are optionally the same as or different from each other, and shows a crystal-amorphous structure period of not less than 1 m as determined by a light scattering method.