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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A deep investigation into the thermal degradation of urethane dimethacrylate polymer

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Alarcon, Rafael Turra [1] ; Gaglieri, Caroline [1] ; dos Santos, Giovanny Carvalho [1] ; Roldao, Juan Carlos [1] ; Magdalena, Aroldo Geraldo [1] ; da Silva-Filho, Luiz Carlos [1] ; Bannach, Gilbert [1]
Total Authors: 7
[1] UNESP Sao Paulo State Univ, Sch Sci, Chem Dept, BR-17033260 Bauru, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 147, n. 4, p. 3083-3097, FEB 2022.
Web of Science Citations: 0

This work investigates in depth the thermal degradation process of a polymer of urethane dimethacrylate (UDMA). UDMA monomer has been widely used in dental restorations and biomaterials. The use of density functional theory (DFT) calculations provided the bases for understanding the structure and reactivity of the UDMA monomer. Simultaneous thermogravimetry-differential thermal analysis, Photovisual Differential Scanning Calorimetry, and mid-infrared spectroscopy (MIR) were used to examine the depolymerization and degradation process. Non-isothermal kinetics made it possible to determine the best fit (n-dimensional nucleation according to Avrami-Erofeev followed by two competitive processes: nth order with autocatalysis by-product and reaction of nth order). Furthermore, the UDMA-P lifetime (5%) was calculated to show a degradation time of 3 years at 100.0 degrees C. Notwithstanding, techniques such as MIR and nuclear magnetic resonance C-13, H-1 linked to DFT calculations helped to elucidate the cleavage positions and possible degradation by-products of UDMA degradation. (AU)

FAPESP's process: 16/01599-1 - Studies about the use of NbCl5 in multicomponent reactions for the synthesis of organic dyes
Grantee:Luiz Carlos da Silva Filho
Support type: Regular Research Grants
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 type: Regular Research Grants
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 type: Scholarships in Brazil - Doctorate
FAPESP's process: 18/14506-7 - Study about the one-pot synthesis and application as organic dyes of quinolone and anthrazoline derivatives
Grantee:Luiz Carlos da Silva Filho
Support type: Regular Research Grants
FAPESP's process: 15/00615-0 - Studies on the synthesis and photochemical and photophysical characterization of quinoline derivatives with donor-p-acceptor structure for use as sensitizing dyes in organic electronic devices
Grantee:Giovanny Carvalho dos Santos
Support type: Scholarships in Brazil - Doctorate