Development of Eco-Friendly Biodegradable Polymers Based on Polyethylene, Polyvinyl Alcohol, Starch, and Rice Straw
Bekbayeva L. Negim E.-S. Niyazbekova R. Al Azzam K.M. Kairatuly O.Z. Ahmed E.H. Yeilgbayeva G. Al-Harahsheh S.
September 2025National Information and Documentation Centre
Egyptian Journal of Chemistry
2025#68Issue 9237 - 247 pp.
A biodegradable polymer with starch-based modifying characteristics was prepared using a combining polymerization method, blending polyethene (PE), polyvinyl alcohol (PVA) and different ratios of starch (S, 3, 5 and 7%) in presence of xylene as solvent and glacial acetic acid as catalyst. Investigations were conducted into the impact of starch on the viscosity, tensile strength, elongation, and contact angle of biodegradable polymer films. These blended polymers were further mixed with rice straw at concentrations of 1.0, 3.0, and 5.0 wt.% based on the blended polymers. The utilization of starch improved the biodegradability of the films because of functional groups from polyethylene blended polyvinyl alcohol and starch P(PE-b-PVA-b-S), such as OH, which can form hydrogen bonds with starch. However, an increase in starch content in biodegradable copolymers increases the biodegradability of the film and decreases the mechanical properties. Tensile test, elongation and contact angle of P(PE-b-PVA-b-S) were evaluated for different ratios of starch content. Increasing the starch ratio to 7 wt.% enhances the tensile strength to 27.1 MPa, whereas a lower starch ratio of 3 wt.% results in a tensile strength of 19.4 MPa. Conversely, it reduces the elongation to 115 % compared to the lower starch content 130 %. The addition of starch significantly improved the moisture resistance and biodegradability of the new P(PE-b-PVA-b-S) compound, while increasing the amount of rice straw enhanced its mechanical properties.
Biodegradable , Blend , Polyethylene , Polyvinyl alcohol , Starch.
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National Nanotechnology Open Laboratory, Al-Faraby Kazakh National University, Al-Faraby av. 71, Almaty, 050040, Kazakhstan
School of Materials Science and Green Technologies, Kazakh British Technical University, St Tole bi 59, Almaty, 050000, Kazakhstan
”Kazecoengineering” LLP, St Turan 50/3, Astana, 010017, Kazakhstan
Department of Chemistry, School of Science, University of Jordan, Amman, 11942, Jordan
Institute of Organic Synthesis and Carbon Chemistry of the Republic of Kazakhstan, St Alikhanov 1, Karaganda, 100000, Kazakhstan
School of Petroleum Engineering, Satbayev University, 22 Satbayev Street, Almaty, 050013, Kazakhstan
Faculty of Earth and Environmental Sciences, Al Al Bayt University, Al Mafraq, 25113, Jordan
National Nanotechnology Open Laboratory
School of Materials Science and Green Technologies
”Kazecoengineering” LLP
Department of Chemistry
Institute of Organic Synthesis and Carbon Chemistry of the Republic of Kazakhstan
School of Petroleum Engineering
Faculty of Earth and Environmental Sciences
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