HYDROGEN-BONDING EFFECTS IN GLASSY STATE OF RANDOM COPOLYAMIDES

被引:20
作者
HATAKEYAMA, T [1 ]
KANETSUNA, H [1 ]
机构
[1] RES INST POLYMERS & TEXT, KANAGAWA, YOKOHAMA, JAPAN
关键词
D O I
10.1002/pol.1973.180110501
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The thermal behavior of random copolyamides which are used as model polymers with hydrogen bonds has been investigated by differential scanning calorimetry (DSC), x-ray diffraction, and IR spectroscopy. The quenched copolyamides have only halo patterns in their x-ray diffraction photographs. When the sample was kept at the glass transition temperature (20C), no change in x-ray diffraction was observed after the treatment. The free amide band in the infrared spectrum at 3450 cm**-**1, however, was decreased in intensity by keeping the sample at the glass transition temperature. The transition peak height observed in a DSC curve also increased in the same experiment. It is concluded that in the case of the random copolyamide, structures corresponding to a given enthalpy of the glassy state can be related to the number of hydrogen bonds.
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页码:815 / 823
页数:9
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