BSU bulletin. Chemistry. Physics
Bibliographic description:
, LOW-FREQUENCY VISCOELASTIC RELAXATION IN POLYMER LIQUIDS // BSU bulletin. Chemistry. Physics. - 2022. №1. . - С. 24-31.
Title:
LOW-FREQUENCY VISCOELASTIC RELAXATION IN POLYMER LIQUIDS
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Annotation:
In liquids, along with a high-frequency (1010 Hz) relaxation process, there is a low-frequency viscoelastic relaxation (104–105 Hz), which is determined by the collective
relaxation in amorphous polymers, which is observed above their glass transition tempera- ture and is explained by the disintegration of physical microvolume nodes — associates of the molecular network. According to the evaluation of the activation energy for polyeth- ylsiloxane polymer liquids, low-frequency viscoelastic relaxation in liquids refers to low- activation processes.
relaxation in amorphous polymers, which is observed above their glass transition tempera- ture and is explained by the disintegration of physical microvolume nodes — associates of the molecular network. According to the evaluation of the activation energy for polyeth- ylsiloxane polymer liquids, low-frequency viscoelastic relaxation in liquids refers to low- activation processes.
Keywords:
resonance method, liquid, viscoelastic properties, shear elasticity, relaxation, activation energy.
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