Torsion modulus with CaCO3 fillers in unsaturated polyester resin - mechanical spectroscopy

Author(s)

Carlos Alberto Fonzar Pintão ^[1] ; Airton Baggio ^[2] ; Lucas Pereira Piedade ^[3] ; Luiz Eduardo de Angelo Sanchez ^[4] ; Gilberto de Magalhães Bento Gonçalves ^[5]

Affiliation

^[1] Universidade Estadual Paulista. Faculdade de Ciências. Departamento de Física - Brasil

^[2] Universidade Estadual Paulista. Departamento de Engenharia Mecânica - Brasil

^[3] Universidade Estadual Paulista. Departamento de Engenharia Mecânica - Brasil

^[4] Universidade Estadual Paulista. Departamento de Engenharia Mecânica - Brasil

^[5] Universidade Estadual Paulista. Departamento de Engenharia Mecânica - Brasil

• Document type: Journal article
• Source: POLIMEROS-CIENCIA E TECNOLOGIA; v. 32, n. 2 2022-07-29.

Abstract

Abstract This work presents an alternative to studying and determining the torsion modulus, G, in composites. For this purpose, we use a measuring system with a rotation motion sensor coupled with a torsion pendulum that allows for determining the angular position as a function of the time. Then, through an equation derived from mechanical spectroscopy studies that permits the calculation of G’s value, the experiments focus on samples of different quantities of calcium carbonate (CaCO3) in unsaturated polyester resins. The results show that CaCO3 (33.33%W) fillers increase G’s value by 88% compared with unsaturated resin (100%W). Furthermore, there is a density increase of approximately 21% with the addition of CaCO3, considering the same two samples, which makes these composites the most massive. The relationship between G and composite density shows that it is possible to change the amount of CaCO3 to increase torsion resistance values in a controlled way. (AU)

• FAPESP's process: 07/04094-9 - Measure of the moment of inertia of solids and liquids: moment of the inertia and internal friction
• Grantee: Carlos Alberto Fonzar Pintão
• Support Opportunities: Regular Research Grants
• FAPESP's process: 15/00851-6 - Biofunctionalization of Ti-15Zr-BASED alloys with molybdenum addition and some surface modifications
• Grantee: Diego Rafael Nespeque Correa
• Support Opportunities: Scholarships in Brazil - Post-Doctoral