Abstract Vinyl esters and carbonates have recently been demonstrated to considerably lower cytotoxicity than their more commonly used (meth)acrylate counterparts, inspiring use in the 3D printing of biomaterials. However, degradation rates such synthetic photopolymers are slow, especially mild conditions present many biological environments. Some applications, for example, tissue regeneration s...

Fatigue loading is critical to fibre reinforced polymer composites due their anisotropic and heterogenous nature. This study investigated the tensile fatigue behaviour of polyester vinyl ester based GFRP laminates understand aspects failure mode life under cyclic loading. with two different resin systems (polyester ester), stress ratios (0.1 0.5) environmental conditions (air water) were at an ...

Poly(ortho ester)s (POEs) are well-known for their surface-eroding properties and hence present unique opportunities for controlled-release and tissue-engineering applications. Their development and wide-spread investigation has, however, been severely limited by challenging synthetic requirements that incorporate unstable intermediates and are therefore highly irreproducible. Herein, the first...

The first enantioselective cross-electrophile coupling of aryl bromides with meso-epoxides to form trans-β-arylcycloalkanols is presented. The reaction is catalyzed by a combination of (bpy)NiCl2 and a chiral titanocene under reducing conditions. Yields range from 57 to 99% with 78-95% enantiomeric excess. The 30 examples include a variety of functional groups (ether, ester, ketone, nitrile, ke...

This organic laboratory experiment introduces students to stereoselective enzyme reactions, resolution of enantiomers, and NMR analysis of diastereomers. The reaction between racemic 1-phenylethanol and vinyl acetate in hexane to form an ester is catalyzed by acylase I. The unreacted alcohol is then treated with a chiral acid and the resulting ester diastereomer is analyzed by NMR. This experim...

The main purpose of this study is an experimental investigation and comparison the mechanical properties pultruded glass fibre reinforced polymer composite based on polyester vinylester resin. For purpose, specimens were cut from walls square tube profile along to fibres direction. such as ultimate tensile strength bending strength, modulus flexural obtained. It was observed that using vinyl es...

2-Cyclopenten-1-one-5-carboxylic ester derivatives 14 are synthesized in a four-step-reaction sequence starting from alkynyl aldehydes 9 via 4Z-b-vinyl-a-diazo b-ketoesters intermediate 8. The synthetic method for 8 is described. When the d substituent is an alkyl group, Rh(II)-mediated decomposition of the diazo compounds 8 led to an intramolecular C–H insertion to afford 2-cyclopenten-1-one-5...