ナイロン3の重水素化

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Deuterations to NH groups of Nylon 3 with heavy water were experimented through the temperature range of 25-150℃ on heat-set films and unset one as well, and ”Accessibilities to water” were measured on the view point of the fine structure of the films.　For the standard value of accessibility (accessibility is 100%), the partition coeffcient of deuterium between Nylon 3 and heavy water was measured, and decided as 1.11+-0.02, making use of the lowering of the melting point of Nylon 3 in water (340℃ -> 130℃) and the few breaking of molecular chains at the temperature, the breaking ratio of the chain linkage was about one to one hundred linkages.　Diagrams of the inter molecular cohesion energy distribution of Nylon 3 films, heat-set at 100-130℃ in vacuo or in steam and unset, were induced from the water accessibility-temprerature curves, and the free energy of fusion of cohered chain per structural unit, ΔF^i_u, was used for the scale of cohesion energy in the abscissae of the diagrams.　The diagrams were analysed together with experimental results of X-ray methods of both wide angle and small angle scattering and of density method etc, and followings were results.　Thc fine structure of Nylon 3 was tightened and improved by heatset, especially by steam set, as well as some other linear polymers, and the cohesion energy distribution diagrams clearly showed the process of evolution, so to speak, of fine structure along the progress of heat set.　Our deuteration method as the fine structure analysis have a characteristic that objective regions of fine structure to analyse are wide, from amorphous to crystal1ine, and this method is especially avairable for crystalline region, but is less adaptable to a lower lateral order part of amorphous region.
山形大学の論文
1974-02-20

ナイロン3の重水素化

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