Thermal behavior of some cyclic anhydrides: an important characterization for synthesis in the polymer field

Author(s)

Gaglieri, Caroline ; de Moura, Aniele ; Alarcon, Rafael T. ; Magri, Raquel ; Bannach, Gilbert

• Document type: Journal article
• Source: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. N/A, p. 12-pg., 2022-01-23.

Abstract

Polyfunctional cyclic organic anhydrides are widely used in different fields, especially in monomer synthesis and therefore polymers applications. However, there is a lack in the literature about their thermal and spectroscopic characterization, which can lead researchers to a misunderstanding result, interpretation, and even spoiling yield values when there is a mixture between anhydride and its respective acid. Thus, in the present paper, it was evaluated a complete and depth thermal and spectroscopic characterization of some anhydrides (maleic, succinic, phthalic, naphthalic, pyromellitic, and benzophenone). In addition, it was demonstrated how to identify the acid presence, and how to recovery the anhydride (when possible) by thermal analysis. Lastly, it was demonstrated case studies about the importance of knowing the anhydrides properties to verify residual anhydrides in final products, anhydrides recovering as well as parallel reactions in polymer synthesis using some organocatalysts. Furthermore, UV-vis results exhibited absorption bands for each anhydride, which can be helpful for researches about aggregation-induced emission observed in some luminescent materials. (AU)

• FAPESP's process: 20/00906-3 - Synthesis and characterization of new biopolymers from baru oil following the principles of green chemistry
• Grantee: Raquel Magri
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 18/03460-6 - Structural modification of triglycerides aiming new monomers and polymers, using different synthetic routes: microwave irradiation and photopolymerization
• Grantee: Rafael Turra Alarcon
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 17/08820-8 - Synthesis and characterization of biopolymers from vegetable oils and glycerol following the principles of green chemistry
• Grantee: Gilbert Bannach
• Support Opportunities: Regular Research Grants