Temperature modulated optical refractometry: A novel and practical approach on curing and thermal transitions characterizations of epoxy resins
| Autor: | Martine Philipp, Julia Rocha Gouveia, Nathalie Minako Ito, Aline Cristina Augusto, Jan-Kristian Krüger, Demetrio Jackson dos Santos |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Organic Chemistry 02 engineering and technology Epoxy Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Rheology chemistry visual_art visual_art.visual_art_medium Composite material 0210 nano-technology Glass transition Refractometry Refractive index Curing (chemistry) Shrinkage |
| Zdroj: | Polymer Testing. 77:105915 |
| ISSN: | 0142-9418 |
| DOI: | 10.1016/j.polymertesting.2019.105915 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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