The performance of internal combustion engines should be improved depending on some technological requirements and rapid increase in the fuel expenses. On the other hand, the improvements in engine materials are forced by using alternative fuels and environmental requirements. Therefore, the performances of engine materials become increasingly important. The purpose of PZT loaded cyanate modifi...

to several advantages including superior mechanical properties, chemical and heat resistance, low shrinkage, high adhesivity and low toxicity [1]. However, one of the main drawbacks is the inherent fragility due to the high level of crosslinking in these materials. Because of this aspect, several methods to improve their toughness have been reported [2,3]. Our research group focused on improvin...

Coatings are important instruments in inhibiting the corrosion rate. Field facts various Indonesian shipping industries show that choice of organic materials as coating for ship paint uses epoxy, vinyl and polyurethane. Therefore an experimental study is needed on adhesion ability a armor with these three types materials. The preparation steel specimens type ASTM A36 carried out by blasting, vi...

In the present study, an epoxy compound, 1,2-epoxy-6-methyl-triglycidyl-3,4,5-cyclohexanetricarboxylate (EGCHC) synthesized from sorbic acid, maleic anhydride, and allyl alcohol is proposed. Using commodity chemicals, a bio-based carbon content of 68.4 % for EGCHC resin achieved. When cured with amine hardeners, high oxirane forms stiff cross-linked networks strong mechanical thermal properties...

Two synthesized eco-epoxy components based on TA: (A) glycidyl ether and (B) phosphate ester, are used, as a replacement for the Bisphenol A (BPA) epoxy component, bonding aluminum (Al) carbon fiber reinforced polymer (CFRP). Their effect mode I fracture toughness (GI) is evaluated by Double Cantilever Beam (DCB) testing while using Digital Image Correlation (DIC) in-situ crack tip monitoring. ...

The present study deals with the enzymatic synthesis of biodiesel by transesterification of Jatropha oil (Jatropha curcas L.) with ethanol in a solvent-free system. Seven commercial lipase preparations immobilized by covalent attachment on epoxy-polysiloxane-polyvinyl alcohol composite (epoxy-SiO2-PVA) were tested as biocatalysts. Among them, immobilized lipases from Pseudomonas fluorescens (li...

The Nazarov cyclization of divinyl ketones gives access to cyclopentenones. Replacing one of the vinyl groups by a cyclopropane leads to a formal homo-Nazarov process for the synthesis of cyclohexenones. In contrast to the Nazarov reaction, the cyclization of vinyl-cyclopropyl ketones is a stepwise process, often requiring harsh conditions. Herein, we describe two different approaches for furth...

A highly diastereoselective organocatalytic synthesis of unique functionalised vinyl epoxides, displaying a Morita-Baylis-Hillman backbone, has been developed by means of an user friendly sulfonium ylide epoxidation of aldehydes from a readily available alpha-(bromomethyl)acrylamide derivative. The first result in the asymmetric version is discussed.