POLYMERIC MATRIX COMPOSITION OF BIODEGRADABLE PACKAGE

UDC 543.2, 543.4, 545.5, 678.6, 678.7, 664.2

  • Rymovskaya Mariya Vasilʼyevna − PhD (Engineering), Assistant Professor, the Department of Biotechnology. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: rymovskaya_mv@mail.ru

  • Ratkevich Maksim Vadimovich − Process Engineer. LLC “Plasttrade M” (area no. 1, Metlichitsy village, Okalovskii village council, 223119, Logoisk district, Republic of Belarus). E-mail: panic44@mail.ru

  • Petrushenya Aleksandr Fedorovich − PhD (Engineering), Assistant Professor, the Department of Polymer Composite Materials. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: petralexf@gmail.com

  • Grebenchikova Irina Aleksandrovna − PhD (Engineering), Associate Professor, Assistant Professor, the Department of Biotechnology. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: gre@tut.by

  • Ragatka Dmitriy Anatolʼyevich − Chemical Engineer. CJSC “Greenair” (24, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: ragatka@avanta.by

DOI: https://doi.org/10.52065/2520-2669-2022-259-2-195-209

Key words: biodegradable package, polymer material, corn starch, polylactide, lactic acid, terephthalic acid polymer, solubility, qualitative reaction, IR-spectroscopy, thermogravimetry.

For citation: Rymovskaya M. V., Ratkevich M. V., Petrushenya A. F., Grebenchikova I. A., Ragatka D. A. Polymeric matrix composition of biodegradable package. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2022, no. 2 (259), pp. 195–209 (In Russian). DOI: https://doi.org/10.52065/2520-2669-2022-259-2-195-209.

Abstract

It is difficult to organize recycling for thin-walled and multilayer packaging made of various materials compositions, including materials that are difficult to destroy in the environment. The global trend of transition to biodegradable materials for the production of such products is also supported in the Republic of Belarus; packaging bags with conformity marks appear in retail sales, allowing them to be successfully composted in a mixture with plant and food waste. The study of the composition of the polymer matrix of such material became the study goal.

The research methods had covered the traditionally used methods for analyzing the polymer composition of both synthetic and natural origin. The presence of starch in the composition of the sample was qualitatively established, a low content of low molecular weight and ash substances, and the absence of nitrogencontaining organic substances were shown. The study of the solubility of the material sample in organic solvents and solutions of acids and alkalis made it possible to assume the multicomponent composition of the material sample and to estimate the size of starch particles. Acid hydrolysis of the material sample made it possible to establish the presence in polymer matrix composition of a relatively easily hydrolysable component with the release of acids, as well as polylactide. Comparison of the IR spectrum of the material sample with the library of spectra made it possible to reveal the presence of a terephthalic acid polymer. The presence of starch, polylactide and terephthalic acid polymer is confirmed by thermogravimetric analysis; their content in the material is estimated by the decrease in the sample weight upon heating.

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