Thermal behavior of the copolymers based on styrylphosphonic acid

The main property of copolymers containing phosphonic acid group at side chain is the proton conductivity, therefore there copolymers have strong metal complexation properties, due to the presence of phosphonic group. The copolymers of styrylphosphonic acid and acrylic monomer at different molar ratios were synthesized by thermal polymerization and charcterized by FTIR, thermal analysis and ionexchange capacity. The copolymers present good ion-exchange capacity and can be used as potential ion exchangers

Mass-spectrometry used in characterization of pigments

Naphthol AS pigmens synthesised by RPTC were characterized by M2 mass spectrometry. The rezults show that this technique is not very a reliable method for characterization of such compounds

Adsorption of phenolic compounds from water on polymeric adsorbents with olefin groups

Removal and recovery of aromatic pollutants from water by solid adsorbents have been of considerable concern recently. In this paper, adsorption of phenolic compounds from aqueous solution onto a polymeric adsorbent with olefin groups at temperatures from 297 K was studied

Porphyrin based-systems for the detection of recoverable metals from Li-Ion batteries : mini-review

The collection and recycling of metals, especially heavy metals, from all types of batteries is a major requirement of European Countries. Market studies highlighted that in the rechargeable battery field, lithium batteries are environmental friendly alternatives to the more polluting Ni-Cd batteries. Although lithium is not expected to bioaccumulate and its human and environmental toxicity are low, one source of lithium with impact to the environment is spent lithium batteries, due to the large variety of Li salts incorporated in polymer electrolyte membranes. Concerning to cathode, new trends are based on nanostructured lithium iron and manganese phosphate. Whatever are the metals involved in the cathode of batteries (Co-NiMn-Fe) the problem of controlling the efficiency of metals recovery is implying the use of sensor devices. In this paper we are concerned on porphyrin -based sensor devices for the rapid and accurate detection of Li, Ni, Mn

Removal of escherichia coli from water by system based on phosphorus - containing synthetic preformed polymer

A study of the removal of Escherichia Coli cells from water by a-hydroxyphosphonic group grafted on styrene-6.7% divinylbenzene copolymer was made. The a-hydroxyphosphonic - containing synthetic preformed polymer is well suited for subsequent use of the product as antibacterial agent

The characterization of recycled poly(styrene-co-divinylbenzene) functionalized with α-hydroxyphosphonic acids for new study of antimicrobal tests

Antimicrobials are a wide variety of compounds with the attack for the destruction or inhibition of microorganisms.This article describes the using of recycled α-hydroxyphosphonic acids grafted on styrene-divinylbenzene copolymeras a recycled material for new study of antimicrobial tests

Removal of candida albicans from water by adhesion to aminophosphorous groups grafted onto poly (styrene-co-divinylbenzene)

Candida albicans is a fungal pathogen capable of causing opportunistic infections that may be lethal. The purpose of this study was to establish the removal percent of a Candida albicans culture from a water solution by using some polymers with antimicrobial activity. The mechanism of action is based on yeast adhesion on aminophosphorous active groups

T A I L O R E D ST A R -SHAPE B I O D E G R A D A B L E P O L Y ( L A C T I C A C I D )

S e r i e s o f C h e m i s t r y 1 9 ( 4 ) ( 2 0 1 0 ) 1 9 -26 T A I L O R E D ST A R -SHAPE B I O D E G R A D A B L E P O L Y ( L A C T I C A C I D ) G. polycondensation method, using as catalyst tin chloride, and phosphorus oxychloride or 2-amino-2-methyl-1,3-propandiol as core. The influence of molar ration and concentration of catalyst on molar masses was studied. Moderately high molecular weight and inherent viscosities values up to 0.60 dl/g were obtained

Estudio y preparación de barbotinas de cerámicas técnicas avanzadas oxídicas mediante el molino de atrición

Las cerámicas técnicas se han identificado como uno de los primeros campos donde las mayores mejoras en el procesado y la obtención de productos más avanzados se podrán alcanzar. Avances en la tecnología del procesado cerámico se requerirán para la comercialización de nuevos productos y para el mantenimiento de la competitividad en los productos ya consolidados. El molino de atrición es capaz de suministrar alta energía en el proceso de molienda consiguiendo mayores reducciones de tamaño de partícula. El procesado con el molino de atrición permite conseguir partículas submicrónicas que facilitan las etapas de conformado posterior y mejoran las propiedades del producto final. Esta alta eficiencia del molino de atrición hace que se puedan conseguir partículas en el rango incluso manométrico lo que tiene interesantes implicaciones tecnológicas. El objetivo principal de este trabajo es el estudio de los parámetros que afectan a la desaglomeración y molturación del material de partida, más una caracterización de la microestructura y de las propiedades mecánicas que genera en el material desarrollado