Influence of a long‐side‐chain‐containing reactive diluent on the structure and mechanical properties of UV‐cured films

Abstract

The dimethacrylate reactive diluent (HEMA‐DDSA), a long‐side‐chain‐containing reactive diluent, was prepared by reacting 2‐dodecen‐1‐ylsuccinic anhydride with two equivalents of hydroxyethyl methacrylate. Its structure was characterized by IR and 1H NMR spectroscopy. This new diluent was added into the formulation of UV‐curable epoxy acrylate networks. Results show that the formulation with the addition of HEMA‐DDSA has massively reduced viscosity and shows several attractive properties of epoxy acrylate oligomers. The mechanical resistance of the films is dramatically enhanced with the incorporation of long alkyl groups derived from HEMA‐DDSA, the plastic deformation zone expands, thus decreasing the inner stress of the polymer structure. Moreover, the cured coatings have a higher glass transition temperature as the percentage of HEMA‐DDSA is increased up to 5 wt%. Due to the excellent integrated performance of the polymeric films, HEMA‐DDSA proved to be an effective reactive diluent, which is of potential interest for applications in high performance materials. © 2016 Society of Chemical Industry

Two‐Step Solvent‐Free Synthesis of Poly(hydroxybutyrate)‐Based Photocurable Resin with Potential Application in Stereolithography

“…As reviewed by Chartrain and co‐workers, [ 4 ] such high resolution is a crucial aspect in the manufacturing of custom‐made scaffolds for tissue engineering, making SLA an innovative fabrication approach in medical fields as dentistry, maxillofacial surgery, and orthopedic reconstruction. Typically, a suitable resin for SLA consists of methacrylate or acrylate terminated low molecular weight (MW) polymer or oligomers mixed with a suitable high boiling reactive [ 5 ] or non‐reactive [ 6 ] diluent, which is required for dealing with highly viscous, [ 7 ] or even solid macromonomers. [ 8 ] Indeed, both suitable viscosity (lower than 5 Pa s) [ 2 ] and presence of photo‐sensible terminals are key factors to have a tailored and localized 2D solidification through a photo‐induced cross‐linking process.…”

A Review on Styrene Substitutes in Thermosets and Their Composites

“…Shen et al [59] synthesized a multifunctional methacrylate (HEMA-DDSA) monomer from HEMA and 2-dodecen-1-ylsuccinic anhydride (DDSA) via esterification (Figure 9). The resulting monomer had relatively high molecular weight so that the volatility is insignificant.…”