Epoxy Resin Coatings Crystallization and Influence of Crystallinity on Shore Hardness and Tensile Properties

Abstract:

The epoxy resins are very popular and plentifully used synthetic resins. The bisphenol A-based (DGEBA) and bisphenol F-based epoxy resins (DGEBF) crystallization is phenomenon which is for that kind of resins natural. They are undercooled liquids and they tend to form the crystal structure at the ambient temperature. The subject of the research is to determine the effect of some crystallinity of DGEBF on chosen mechanical parameters. The degree of crystallinity was counted through the specific weights of crystallized bisphenol F-based epoxy resins. The prepared crystallized samples of DGEBA/DGEBF mixtures were mixed in appropriate weight ratio with isophorondiamine (IPD) based curing agent. Measured was hardness Shore D according to EN ISO 868 standard and tensile parameters according to EN ISO 527-1 standard. Furthermore, the effect of crystallinity on chosen mechanical parameters was observed. It was found out that with the higher crystallinity maximum tensile stress and hardness increased close to the standard parameters amorphous DGEBA and DGEBF.

• Periodical: Solid State Phenomena (Volume 276)
• Pages: 173-178
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.276.173
• Online since: June 2018
• Authors: Michaela Vyhnánková*, Jakub Hodul, Jiří Bydžovský
• Keywords: Crystallization, Curing Agent, Epoxy Resin, Hardness, Tensile Strain, Tensile Stress

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