Areas of Local Inelasticity and Relaxation Phenomena in Poly(vinyl formal)статья
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Дата последнего поиска статьи во внешних источниках: 16 января 2019 г.
Аннотация:A comparative analysis of relaxation transitions observed in the internal friction spectra of poly(vinyl alcohol) and poly(vinyl formal) synthesized on its basis is presented. Two distinct peaks (α and β) of dissipative losses are revealed within the temperature range from–150 to +120°C. The time of acetylation of poly(vinyl alcohol) in the production of poly(vinyl formal) affects the characteristics of relaxation phenomena in poly(vinyl formal). A structural justification of change in the relaxation characteristics in poly(vinyl formal) is given according to the internal friction spectra and IR spectra.