A brief description of the potential occupational health hazards encountered in the manufacture of plastics (polymers) is given. In general, these hazards are due to the monomers used to make the various plastics, to unreacted monomer contained within the finished products, and to the fillers, stabilizers, pigments, inhibitors, and initiators used in fabricating the finished products. They run ...

BACKGROUND Epoxy resin systems (ERSs), consisting of resins, reactive diluents, and hardeners, are indispensable in many branches of industry. In order to develop less sensitizing ERS formulations, knowledge of the sensitizing properties of single components is mandatory. OBJECTIVES To analyse the frequency of sensitization in the patients concerned, as one integral part of a research project...

The design of new flame retardants (FR) that avoid the use halogen and phosphorus additives is challenging urgent. Herein we report on synthesis bis-amino functionalized N-heterocyclic carbene cyclopentadienone iron complexes aimed at promoting production containing epoxy resins. Iron are successfully employed to obtain high Tg thermosets with as low 5% hardener content. Moreover obtained resin...

In this paper we build some composite materials reinforced with corn leaves. order to the samples, have firstly created strips in way: put leaves, continuously, on a sheet of where apply layer resin (we used epoxy and polyester ones). We waited for polymerization 48 hours, recommended by producer. leaves layers director tensile test (because will samples tensile). made 10 glued them together us...

(-)-Oxyphyllol was prepared in only 4 steps from an epoxy enone that already served as an intermediate for the total synthesis of the anticancer guaiane (-)-englerin A. A regio- and diastereoselective Co(II)-catalyzed hydration of the olefin and a transannular epoxide opening were used as the key reactions.

Interfacial interactions between carbon nanotubes (CNTs) and polymer matrices play a critical role in the bulk mechanical performance of CNT-reinforced polymer nanocomposites, but their mechanisms remain elusive after over a decade of research. Here we present an in situ electron microscopy nanomechanical study of the non-covalent van der Waals interfaces between individual CNTs and epoxy resin...