Multi-step polymer degradation kinetics using activation energy-dependent cataluminescence was written by Li, Zenghe;Feng, Jing;Tian, Rui;Lu, Chao. And the article was included in Green Chemistry in 2022.Synthetic Route of C73H108O12 This article mentions the following:
Understanding the mechanism of polymer degradation is vital to the development of rational strategies for polymer management. However, conventional techniques for polymer degradation evaluation rely on the determination of functional group or mol. weight, which fail to provide kinetic information on the steps for polymer degradation Herein, the degradation evolution and kinetics of polyoxymethylene (POM) are monitored using cataluminescence (CTL) dynamic curves of the generated formaldehyde. The two peaks in the CTL dynamic curves for POM under different atmospheres indicate the occurrence of different reaction pathways, dependent on the reaction kinetics and activation energies of the degradation steps. The activation energies of 31.44 and 48.14 kJ mol-1 were attributed to the end-group rupture, and a higher activation energy of 119.52 kJ mol-1 was responsible for the harsh oxidation reaction of POM. Therefore, we have demonstrated the capability of CTL for the real-time monitoring and effective differentiation of the degradation pathways for polymers. It is anticipated that this method will provide viable possibilities for the design of polymers with high reliability and sustainability. In the experiment, the researchers used many compounds, for example, 2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8Synthetic Route of C73H108O12).
2,2-Bis(((3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)oxy)methyl)propane-1,3-diyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) (cas: 6683-19-8) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Synthetic Route of C73H108O12
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics