STUDY OF POLYCONDENSATION PROCESS OF CARBAMIDE WITH FORMALDEHYDE TO RECEIVE BIODEGRADABLE POLYMERS

Givi Papava; Nazi Gelashvili; Eter Gavashelidze; Riva Liparteliani; Ketevan Archvadze

doi:10.31435/rsglobal_ws/30092020/7209

Givi Papava Professor, Doctor, Petre Melikishvili Institute of Physical and Organic Chemistry of Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia https://orcid.org/0000-0002-8837-4909
Nazi Gelashvili Doctor, Petre Melikishvili Institute of Physical and Organic Chemistry of Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
Eter Gavashelidze Doctor, Petre Melikishvili Institute of Physical and Organic Chemistry of Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia https://orcid.org/0000-0002-0479-5782
Riva Liparteliani Doctor, Petre Melikishvili Institute of Physical and Organic Chemistry of Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia
Ketevan Archvadze Petre Melikishvili Institute of Physical and Organic Chemistry of Ivane Javakhishvili Tbilisi State University, Tbilisi, Georgia

DOI: https://doi.org/10.31435/rsglobal_ws/30092020/7209

Keywords: spatial structure, linear structure, peptide bond, microorganisms, biodegradable, prolonged action, synthesis, temperature, duration, catalyst

Abstract

Biodegradation of polymers of spatial structure is complicated at the impact of soil destructive microorganisms and biodegradation requires long time. We have implemented target-oriented synthesis of a polymer to receive linear structure polymers where labile peptide bonds are preserved.
To implement target-oriented synthesis of a polymer and to determine optimal conditions for reaction mechanism we studied the process of kinetics and its regularities – reaction temperature, duration, components ratio, concentration, reaction speed constant and activation energy. The Arrhenius factor and succession of introduction of initial components to the reaction medium were computed, catalyst nature and other properties were determined.
High effect of prolongation was achieved, when carbamide and formaldehyde molar ratio was 1:1. In this case linear structure polymer is formed where peptide -CH₂ – NH – are preserved.
The simplified structure of linear polymer is expressed as followed: – HNCONHCH₂[ NHCONHCH₂]_n – HNCONHCH₂ – .

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