Molecularly imprinted polymers are synthetic materials designed to selectively bind to a templated molecule. In this study, the effect of including both positive and negative charges simultaneously into the hydrogel network on the selective recognition properties of the MIP is examined. Using 3-methacrylamidopropyl trimethylammonium chloride (MAPTAC) as a cationic monomer and 2-acrylamido-2meth...

The alternating copolymers of carbon monoxide (CO) and vinyl arene monomers, namely aromatic polyketones, are a family attractive engineering plastic. In the catalytic synthesis this kind polymeric materials, [N,N] bidentate palladium catalysts represent most successful systems. review, we introduce present status polyketone synthesis, with focus on polyketones made from CO. We also address pal...

A simplified mathematical model which made use of Fick's laws of diffusion written in spherical coordinates was developed to describe the rate of diffusion of residual monomers from polymer resins. The properties of the monomer-polymer system which influenced the amount of monomer remaining in the polymer as a function of time were the diffusivity and solubility of the monomer in the polymer, a...

In water distribution systems containing PVC pipe manufactured in the ‘‘early era’’ ~prior to 1977!, vinyl chloride can leach into drinking water resulting in vinyl chloride concentrations exceeding the 2 mg•L maximum contaminant level. Field testing of dead-end segments of water distribution systems consisting of early-era PVC pipe was conducted to examine their initial intrapipe vinyl chlorid...