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>Investigation of the fine structure of high polymers by the method of deuterium exchange. I. Changes in lateral‐order distribution of nylon 6 by heat setting
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Investigation of the fine structure of high polymers by the method of deuterium exchange. I. Changes in lateral‐order distribution of nylon 6 by heat setting
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机译：Investigation of the fine structure of high polymers by the method of deuterium exchange. I. Changes in lateral‐order distribution of nylon 6 by heat setting
AbstractThe lateral‐order distribution of nylon 6 was evaluated by deuteration and infrared spectroscopic measurement. Unset, dry‐heat‐set, and steam‐set samples are placed in contact with D2O vapor at various temperatures from 25 to 150°C. After equilibrium of the reaction is attained, they are dried and sealed in a NaCl cell. The ratio of the intensity of ND to CH vibration bands in the 3–4 μ region is calculated from the infrared spectra and plotted against temperature of deuteration. The curves obtained show the accessibility of the sample to D2O vapor at various temperatures, and the differential of the curve gives the lateral‐order distributions of nylon 6. The lateral‐order distribution shows that regions of amorphous and of intermediate order decrease, and regions of higher and crystalline increase on dry heat setting, while regions of intermediate order markedly decrease and amorphous and crystalline regions increase on steam setting. These phenomena suggest that loosening of polymer molecules in the amorphous regions and crystallization are caused b
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