Curing kinetics of tetrathiol-crosslinked diglycidyl ether of bisphenol A and poly(ethylene oxide)diglycidylether

[Display omitted] •A four-part thermoset system based on PEO and DGEBA is designed and investigated.•Curing kinetics in isothermal and non-isothermal scenarios are quantified.•Higher DGEBA content increases curing rate and glass transition temperature.•Glass transitions are predictable via the Flory-Fox Equation. Crosslinked polymers are used broadly due to their tunable material properties (reactivity, physical properties, etc.) making them candidates for remediating leakage pathways in subsurface wellbores where leakage of hydrocarbons or injected fluids pose risks to overlying resources. We investigate curing behavior and physical properties of an epoxy-based system towards an injectable wellbore sealant. Isothermal and non-isothermal curing are examined via differential scanning calorimetry, and monomer mixture and cured specimen physical properties characterized. Material behavior is dependent on curing temperature and comonomer content. Increasing temperature or DGEBA content increases curing rate, pre-curing solution viscosity and post-curing glass transition temperature.