Curing kinetics and mechanical properties of epoxy based coatings: The influence of added solvent

Kinetic Analysis of the Curing of a Partially Biobased Epoxy Resin Using Dynamic Differential Scanning Calorimetry

“…All the above-mentioned methods give an apparent activation energy between 57 and 62 kJ·mol −1 , which is in total accordance with typical E a values for DGEBA-based epoxy resins, thus suggesting the plant-derived reactive diluent did not affect in a remarkable way the curing process α of the resin [11]. As suggested by the standard deviation of E a from different methods, there is very low variation of E a with α, as can be seen in Figure 8.…”

“…These outstanding properties make these resins suitable for high technological sectors such as the automotive and aerospace industries. In addition, their versatility makes them useful for industrial applications such as adhesives, paints, surface coatings, advanced composite materials, electrical and electronic components, and high-performance membranes for separation and filtration, among others [3,6,7,8,9,10,11,12,13,14]. The final properties of a structural epoxy system are greatly influenced by several factors, which include the chemical structure of both the epoxy resin and the curing agent and external factors related to the curing procedure.…”

A perspective approach on the amine reactivity and the hydrogen bonds effect on epoxy-amine systems

“…Conversely, Yi et al recently performed a complete study concerning the negative influence of added solvent on the properties of epoxy-amine thermosets. 116 They described that the presence of solvent decreases the curing degree, affecting the cross-linked structure and its properties. In this study, the higher the solvent content added to uncured system, the higher the number of uncured epoxy groups at the end of the curing.…”

Effects of TiO2 Nanoparticles on the Overall Performance and Corrosion Protection Ability of Neat Epoxy and PDMS Modified Epoxy Coating Systems

“…The poor corrosion protection performance of E coating system could be attributed to the weak barrier properties of the epoxy polymeric matrix due to the presence of voids at the coating film surface and pores through the bulk structure of the coating layer. Yi et al (2018) reported that the creation of the voids and the pores is due to the evaporation of the solvent during the curing process and the shrinkage of the coating layer. Moreover, the existence of these pores increases the free volume within the epoxy polymeric matrix and consider the main responsible of the creation of the diffusion pathways that permit the corrosive agents to penetrate through the coating film, hence, the degradation of the corrosion protection ability (Ramezanzadeh et al, 2016a).…”