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- ANALYSIS OF STRUCTURAL CHANGES OF MODIFIED POLYETHYLENE FILMS BY DIFFERENTIAL SCANNING CALORIMETRY
- Kharapudko Yu. V., Timoshina Yu. A., Voznesensky E. F. Analysis of structural changes of modified polyethylene films by differential scanning calorimetry. Technologies & Quality. 2022. No 1(55). P. 5–11 (In Russ.) https: doi 10.34216/2587-6147-2022-1-55-5-11.
- DOI: 10.34216/2587-6147-2022-1-55-5-11
- УДК: 533.924: 677.494
- Publish date: 2022-02-22
- Annotation: The article presents the results of studies of the effect of high-frequency capacitive (HF) plasma modification on the change in the structure of polyethylene (PE) films. To analyse structural changes by differential scanning calometry (DSC), the temperature and specific heat of melting, as well as the glass transition temperature of PE film samples before and after plasma modification in plasma-forming gases argon and air were determined. A temperature programme has been selected to determine the glass transition temperature, which can serve as a qualitative characteristic of structural changes in polymer macromolecules. It is shown that the modified samples have an increase in the glass transition temperature, while the maximum effect is observed for samples modified in the HE plasma of air, which may be due to the formation of functional groups, multiple bonds and crosslinking, which contributes to a decrease in molecular mobility and difficulty of conformational transitions in PE macromolecules.
- Keywords: polymer film, polyethylene, polymer structure, plasma modification, low-pressure high-frequency discharge, differential scanning calorimetry, glass transition temperature
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