Affiliation:
1. Instituto de Tecnología de Materiales, Universitat Politècnica de València (UPV), 03801 Alcoy, Alicante, Spain
Abstract
In this study, formulations of thermoplastic starch (TPS) with 5, 10, and 15 parts per hundred resin (phr) of raw peach gum (PG) were prepared by melt extrusion followed by injection molding to obtain standard specimens for characterization. In addition, biodegradable films were developed by compression molding. It was determined that TPS with 5 phr and 10 phr of PG presented similar mechanical behavior to pure TPS after the processing. However, results indicated that adding PG in 10 phr slowed down the starch’s retrogradation, delaying the TPS structure’s stiffening. Moreover, the TPS–PG formulations presented improved solubility, which increased by 24% with 10 and 15 phr of PG compared to that shown for TPS. Additionally, PG enhanced the compostability of TPS, causing the sample to disintegrate in a shorter period. In conclusion, it was determined that raw PG added in 10 phr could be added as a sustainable additive to modify the biodegradation and water sensitivity of TPS without affecting its mechanical behavior after processing and delaying the retrogradation of the TPS structure, increasing its shelf life.
Funder
European Union “NextGenerationEU”/PRTR
Subject
Polymers and Plastics,General Chemistry
Reference57 articles.
1. Ciardelli, F., Bertoldo, M., Bronco, S., and Passaglia, E. (2019). Polymers from Fossil and Renewable Resources, Springer International Publishing.
2. (2022, February 02). European Bioplastics Bioplastics Market Development. Available online: http://www.european-bioplastics.org/news/publications/.
3. Antimicrobial and Improved Performance of Biodegradable Thermoplastic Starch by Using Natural Rosin to Replace Part of Glycerol;Zhang;Ind. Crops Prod.,2022
4. A Study on Thermal Behaviour of Thermoplastic Starch Plasticized by [Emim] Ac and by [Emim] Cl;Ismail;Procedia Eng.,2017
5. Thermoplastic Starch: Current Development and Future Trends;Xie;J. Renew. Mater.,2014