Preparation and characterization of UV‐cured hybrid coatings by triethoxysilane‐modified dimethacrylate based on bisphenol‐s epoxy

Abstract

Novel hybrid oligomers based on a UV-curable bisphenol-S epoxy dimethacrylate (DBSMA) were synthetized. DBSMA was modified with various amount of (3-isocyanatopropyl)triethoxysilane coupling agent. The modification degree of the hybrid oligomer was varied from 0 to70 wt %. The photopolymerization kinetics was monitored by a real-time infrared spectroscopy. The conversion and rate of hybrid coatings increased with the increase in modification degree. UV-curable, hard, and transparent organic-inorganic hybrid coatings were prepared. They were performed by the analyses of various properties such as surface and mechanical properties. Results from the mechanical measurements showed that the properties of hybrid coatings improved with the increase in modification degree. The thermal behavior of coatings was also investigated.

A novel UV‐curable epoxy acrylate resin containing arylene ether sulfone linkages: Preparation, characterization, and properties

“…Adhesion is one of the key phenomena in obtaining good mechanical and other physico‐chemical properties of coating materials . In general, the adhesive strength at the interface is decided by three factors: specific interaction like electrostatic interaction (hydrogen bond and van‐der Waals force), effect of polymerization shrinkage, and other factors (an anchor effect at the interface) . The result of adhesion test is shown in Table , which proves that the adhesion between EAs and the substrates are all quite strong.…”

“…The hardness of the coating is important to affect the abrasion and scratch resistance . With other properties identical, the abrasive wear rate of a material has been reported to be inversely proportional to its hardness . Chain flexibility and cross‐linking degree of the network play a major role in the value of hardness .…”

“…A novel UV‐curable fluorinated siloxane acrylate and a novel silicon containing acrylate resin were synthesized by Liu and Shi, respectively, the resulted polymers showed that with the incorporation of the fluorinated silicon acrylate and the silicon containing acrylate resin into UV‐cured formulations, the dielectric and tribological properties of the UV‐cured films improved but the thermal decomposition temperature of EA film slightly decreased which may be probably because of the fluorinated silicon and the silicon polymer destroying the cross‐link density of the polymer systems and resulting in the reduction in the rigidity of polymeric network. Moreover, the introduction of silicon usually leads to the reduction in the adhesion between the films and the substrates and poor acid and alkali resistance of the films . Based on the above facts, modification of epoxy acrylate structure by adding oligomers containing fluorine and silicon is not an effective method to improve the thermal properties and chemical and solvent resistance of epoxy acrylate resin.…”

Hybrid Organic/Inorganic Coatings Through Dual-Cure Processes: State of the Art and Perspectives

“…Li et al synthesized a hybrid oligomer through the modification of a bisphenol-S epoxy dimethacrylate with different amounts of 3-isocyanatopropyltriethoxysilane, used both as coupling agent and silica source [40]. The modification degree of the hybrid oligomer was varied from 0 to 70 wt.%.…”

Investigating the Free‐Volume Characteristics of Regulated Dimethacrylate Networks Below and Above Glass Transition Temperature

“…Photopolymerization, characterized by very fast network formation, is essential for a wide range of applications such as protective and decorative coatings, dental materials, or 3D lithography . The photopolymerization of employed multifunctional methacrylates usually creates inhomogeneous and rather brittle polymer networks via a radical chain growth mechanism.…”