Temperature modulated optical refractometry: A novel and practical approach on curing and thermal transitions characterizations of epoxy resins

Autor(es)

dos Santos, Demetrio Jackson ^{[1, 2]} ; Gouveia, Julia Rocha ^[1] ; Philipp, Martine ^[3] ; Augusto, Aline Cristina ^[1] ; Ito, Nathalie Minako ^[1] ; Krueger, Jan Kristian ^[3]

Afiliação do(s) autor(es)

^[1] Fed Univ ABC UFABC, Nanosci & Adv Mat Grad Program PPG Nano, Santo Andre - Brazil

^[2] Fed Univ ABC UFABC, Mat Sci & Engn Grad Program PPG CEM, Santo Andre - Brazil

^[3] Univ Saarland, Lehrstuhl Adhaes & Interphasen Polymeren, Gebdude C6-3, D-66041 Saarbrucken - Germany

• Tipo de documento: Artigo Científico
• Fonte: Polymer Testing; v. 77, AUG 2019.
• Citações Web of Science: 2

Resumo

Chemically induced glass transition and shrinkage during polymer curing are often disregarded, albeit their strong effect on cohesion and organization of solid-state matter. One strategy to access these features is the acquisition of the static and dynamic volume expansion coefficients. ``Temperature Modulated Optical Refractometry{''} (TMOR) is a novel and purely thermo-optical analysis technique that allows the time or temperature evolution of both properties. With the aid of TMOR, the curing kinetics of an epoxy resin, including the inherent chemically induced glass transition and shrinkage, was investigated in this work. Shrinkage of an epoxy resin, as function of refractive index changes, was measured for the first time. Afterwards, dynamic thermal coefficients and shrinkage, verified at different time intervals, revealed the hindrance of molecular self-diffusion at the late curing stage. In addition, TMOR results were compared with rheological measurements, and yielded new insights into curing kinetics of an epoxy. (AU)

• Processo FAPESP: 17/22936-9 - Refratometria ótica com modulação de temperatura: uma perspectiva molecular na cinética de cura e separação de fases de poliuretanos a partir de lignina
• Beneficiário: Demetrio Jackson dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Regular