Acceleration Effects of Residual Monomers on the Degradation of Poly(glycolic acids)

The degradation rate of biodegradable materials, which may be affected by many factors, is often the focus of research aimed at expanding its application. During the fabrication of polyglycolide (PGA), glycolide (GA) monomers are often difficult to be completely polymerized and eliminated. The resid...

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Bibliographic Details
Published in:Journal of polymers and the environment 2021-09, Vol.29 (9), p.3054-3067
Main Authors: Ning, Yang, Wang, Wei-Yu, Zhou, Ying-Guo, Zou, Jun, Chang, Ling-Fei, Xu, Hai-Qing
Format: Article
Language:English
Subjects:
Biodegradability
Biodegradable materials
Biodegradation
Chemistry
Chemistry and Materials Science
Crystal structure
Crystallinity
Deionization
Environmental Chemistry
Environmental Engineering/Biotechnology
Fabrication
Glycolic acid
Industrial Chemistry/Chemical Engineering
Materials Science
Monomers
Morphology
Original Paper
Polyglycolic acid
Polymer Sciences
Sodium hydroxide
Viscosity
Water chemistry
Weight loss
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Summary:The degradation rate of biodegradable materials, which may be affected by many factors, is often the focus of research aimed at expanding its application. During the fabrication of polyglycolide (PGA), glycolide (GA) monomers are often difficult to be completely polymerized and eliminated. The residual monomer may influence the degradation rate of the obtained PGA resin. In this study, the effect of the presence of GA monomer on the degradation behavior of PGA in three different solutions was investigated, and the chemical structure change, weight loss, crystallinity, intrinsic viscosity, thermal performance, and microscale morphology within 2 weeks were characterized. The results showed that the mass loss rate, crystallinity and intrinsic viscosity of PGA depended on the GA content and the degradation environment. Furthermore, different degradation solutions were found to result in varied degradation rates of PGA. Generally, the degradation rate of PGA in NaOH solution was the fastest, followed by HCl solution, and the slowest degradation was observed in deionized water. However, regardless of the type of solution used, it could be concluded that the GA monomer accelerated the degradation of PGA. The effect of GA on the degradation of PGA was attributed to the increase in the hydrophilicity of the polyester when GA was present, leading to a microporous structure of the material, which accelerated the degradation of the material by internalized water molecules.
ISSN:1566-2543
1572-8919
DOI:10.1007/s10924-021-02102-9