Sorption of Water Vapour by N-Vinyl Caprolactam Oligomers

Water vapour sorption by vinyl caprolactam polymer samples with the molar masses in the range of 2.6—25 × 103 g mol−1 was investigated. Influence of the degree of polymerization on sorption was discovered for the oligomers. This dependence was not observed for the high-molar-mass polymers. The possible causes of this phenomenon are discussed.