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Resin Molding and Rheology, Session 14: "Progress of Reactions in Thermosetting Resins"

Resin Molding and Rheology, Session 14: "Progress of Reactions in Thermosetting Resins"

Explaining how to investigate and define reaction states! Introducing definitions such as reaction rate and reaction speed.

Thermosetting resins are composite materials made up of a main agent, a curing agent, and various additives. From the moment these components are mixed, a chemical reaction occurs that changes the molecular structure from two-dimensional to three-dimensional, advancing polymerization and ultimately resulting in an insoluble product. Changes in physical properties such as viscosity, elastic modulus, and specific volume are closely related to the progress of the reaction. In this column, we will introduce how to investigate and define the reaction state. [Contents] ■ Measurement of reaction heat ■ Definition of reaction rate and reaction speed ■ Reaction rate equations *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

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Resin Molding and Rheology, Session 15: "Damping Reaction Rate Equation"

Resin Molding and Rheology, Session 15: "Damping Reaction Rate Equation"

Explanation of models representing temperature dependence and temperature and reaction rate dependent models using graphs!

In this column, we will introduce the decay reaction rate equation commonly used in the field of chemistry. Even with the same material, reactions become more active at higher temperatures and proceed more slowly at lower temperatures. A common method to express the temperature dependence of reaction rates is to use the Arrhenius model. The Arrhenius model was proposed by a Swedish chemist as a formula to predict chemical reactions at a certain temperature, and it is now widely used as a standard method to represent the temperature dependence of reactions. [Contents] ■ Models representing temperature dependence ■ Temperature and reaction rate dependent models *For more details on the column, you can view it through the related links. Please feel free to contact us for more information.

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Example of calculating elongational viscosity using the K-BKZ model in resin molding and rheology.

Example of calculating elongational viscosity using the K-BKZ model in resin molding and rheology.

Explanation of the uniaxial elongation viscosity calculation formula at a constant strain rate and the comparison between uniaxial elongation viscosity and shear viscosity!

In the previous article, we presented the calculation formulas for uniaxial elongational viscosity of viscoelastic materials at a constant strain rate, as well as the calculation formulas for viscosity in simple shear flow. In this column, we will establish the following assumptions to simplify the phenomenon as much as possible. For more details, please refer to the related links. We encourage you to read it. [Contents] ■ K-BKZ Model ■ Calculation Assumptions ■ Calculation Results of Uniaxial Elongational Viscosity ■ Comparison of Uniaxial Elongational Viscosity and Shear Viscosity *For detailed content of the column, please refer to the related links. If you have any questions, feel free to contact us.

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