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Wednesday, February 19 • 1:30pm - 2:00pm
Understanding Chemical Resistance in Epoxy Systems - Evonik

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Two-component epoxy systems have proven track record for providing excellent mechanical properties, chemical resistance, and adhesion to a wide range of substrates. They are frequently chosen over other technologies especially when chemical resistance is an important attribute. Chemical resistance is required in a variety of applications from construction and infrastructure to marine and protective metal coatings, and involves various substrate surfaces in flooring, bridges, wastewater treatment plants, power plants, metal equipment, and marine ships. These assets are constantly under attacks from various chemicals such as salt water, acids, and organic solvents. Chemical resistance is critical to provide protection to maximize the service life of the assets.

A number of factors determine the type of epoxy system required for chemical resistance. Key aspects influencing the chemical resistance of an epoxy system include crosslinking density, and degree of cure. Crosslinking density largely depends on the structure and functionality of epoxy resin and curing agent, while system mobility impacts the degree of cure. Molecular modelling and analytical techniques of differential scanning calorimetry, Raman spectroscopy, and dynamic mechanical analysis shed light on the fundamental understanding of the influence of crosslinking density and degree of cure on chemical resistance. This paper will detail the results of such fundamental study.

Speakers
avatar for Dr. Shiying Zheng

Dr. Shiying Zheng

Research Director, Evonik Corporation
Dr. Shiying Zheng is a research scientist at Crosslinkers business line of Evonik Corporation in Allentown, PA. Her current primary focus is developing new epoxy curing agents and aqueous epoxy resin dispersions for coating applications. Dr. Zheng brings extensive industrial R&D experience... Read More →



Wednesday February 19, 2020 1:30pm - 2:00pm
Rhythms II-III