CPC C08J 7/048 (2020.01) [C08F 20/06 (2013.01); C08G 73/0206 (2013.01); C08J 7/08 (2013.01)] | 9 Claims |
1. A gas barrier polymer formed by heat-curing a mixture including polycarboxylic acid and a polyamine compound,
wherein, in an infrared absorption spectrum of the gas barrier polymer, when a straight line connecting a measurement point at 1493 cm−1 and a measurement point at 1780 cm−1 is set as a baseline, an absorption intensity at 1660 cm−1 is set as I(1660), and an absorption intensity at 1625 cm−1 is set as I(1625),
R represented by Equation (1) is greater than 1,
R=I(1660)/I(1625)−{−0.65×(total amine/COOH)+0.4225} (1)
in Equation (1), “total amine” is a total number of moles of primary, secondary, and tertiary amino groups included in the polyamine compound in the mixture, and “COOH” is the number of moles of —COOH groups included in the polycarboxylic acid in the mixture,
wherein a weight average molecular weight of the polycarboxylic acid is equal to or more than 5×105 and equal to or less than 2×106, and
wherein (total of the number of moles of —NH groups and the number of moles of —NH2 groups included in the polyamine compound in the mixture)/(the number of moles of —COOH groups included in the polycarboxylic acid in the mixture) is 0.28 to 0.42.
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