References of "Journal of Applied Polymer Science"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailOxidative degradations of oxodegradable LDPE enhanced with thermoplastic pea starch: thermo-mechanical properties, morphology, and UV-ageing studies
Raquez, Jean-Marie; Bourgeois, Aurore; Jacobs, Heidi et al

in Journal of Applied Polymer Science (2011), 122(1), 489496

The abiotic UV-degradation behavior of oxodegradable LDPE was investigated in the presence of thermoplastic pea starch (TPPS) in this study. Oxodegradable LDPE was first melt-blended with thermoplastic ... [more ▼]

The abiotic UV-degradation behavior of oxodegradable LDPE was investigated in the presence of thermoplastic pea starch (TPPS) in this study. Oxodegradable LDPE was first melt-blended with thermoplastic pea starch (TPPS) using an internal mixing chamber to enhance the abiotic oxidative degradation of oxodegradable LDPE. Because of their different affinity, maleated polyethylene was added as compatibilizer. Tensile properties, thermal properties, and morphology of resulting melt-blends were determined at different content in TPPS. High content in TPPS (40 wt %) could be readily added to oxodegradable LDPE without affecting the tensile properties of resulting melt-blends. UV-ageing studies on compatibilized TPPS/oxodegradable LDPE melt-blends were carried out by Attenuated Total Reflectance infrared spectroscopy (ATR-FTIR), Dynamic Thermomechanical Analyses (DMTA) and Differential Scanning Calorimetry (DSC) under abiotic conditions. These results suggested a synergistic effect on the UV-ageing of TPPS-based melt-blends provided by both components during the first stage of UV-irradiation. [less ▲]

Detailed reference viewed: 22 (0 ULg)
Full Text
Peer Reviewed
See detailControlled radical polymerization of N-Vinylphthalimide using carboxyl-terminated trithiocarbonate as RAFT agent and preparation of microfibers via electrospinning technique
Chikaoui-Grioune, D.; Aqil, Abdelhafid; Zalfen, Alina M. et al

in Journal of Applied Polymer Science (2010), 117(2), 1005-1012

Reversible addition-fragmentation chain transfer (RAFT) polymerization of N-vinylphthalimide in N,N-dimethylformamide (DMF) solution was carried out using 2-carboxypropan-2-yl dodecyl trithiocarbonate as ... [more ▼]

Reversible addition-fragmentation chain transfer (RAFT) polymerization of N-vinylphthalimide in N,N-dimethylformamide (DMF) solution was carried out using 2-carboxypropan-2-yl dodecyl trithiocarbonate as a reversible chain transfer agent in the presence of 2,2-azobisisobutyronitrile. The molecular weights of the polymers increased linearly with the monomer conversion and the molecular weight distributions were relatively narrow (PDI < 1.2). It is confirmed by chain extension reaction that the polymer prepared via RAFT polymerization can be used as a macro-RAFT agent. The structure of both polymers was characterized and confirmed by size-exclusion chromatography and 1H-NMR techniques. Ultrafine microfibers were prepared by electrospinning of poly(N-vinylphthalimide) in DMF solution. The effects of electrospinning process parameters such as voltage, tip-to-collector distance, and solution concentration on the morphology and the average size of the electrospun fibers were studied. To evaluate the fiber diameters, scanning electron microscope micrographs of the microfibers were performed. [less ▲]

Detailed reference viewed: 43 (11 ULg)
Full Text
Peer Reviewed
See detailCadmium and copper absorption mediated by a poly(vinyl alcohol)-b-polyacrylonitrile based micelle/Trichosporon cutaneum cell system
Georgieva, Nelly; Bryaskova, Rayna; Debuigne, Antoine ULg et al

in Journal of Applied Polymer Science (2010), 116(5), 2970-2975

The micelles of a recently synthesized copolymer of poly(vinyl alcohol)-b-polyacrylonitrile added to the growth solution of the filamentous yeast Trichosporon cutaneum strain R57 led to the formation of a ... [more ▼]

The micelles of a recently synthesized copolymer of poly(vinyl alcohol)-b-polyacrylonitrile added to the growth solution of the filamentous yeast Trichosporon cutaneum strain R57 led to the formation of a binary system consisting of micelles and cells. The resulting micelle/cell system was studied as a model for the removal of toxic concentrations of heavy-metal ions (cadmium and copper) from aqueous solutions. The ion-removal efficiency mediated by this system was higher than for free-floating cells. The copper-removal efficiency from the solution reached a level of 65% after 24 h of cultivation, whereas the cadmium-removal efficiency reached 62% after 6 h of growth. For comparison, the free-floating cells removed 42% of copper and only 38% of cadmium from the solutions. The effects of surface interactions between the cells and polymer micelles on the biosorption capacity of the cells are discussed in the article. [less ▲]

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailComplexation of uranyl ions by polypyrrole doped by sulfonated and phosphonated polyethyleneimine
Leroy, D.; Martinot, Lucien; Mignonsin, P. et al

in Journal of Applied Polymer Science (2003), 88(2), 352-359

Branched polyethyleneimine (PEI) was sulfonated by reaction with chloropropanesulfonylchloride and phosphonated by reaction with phosphorous acid and formaldehyde. The accordingly formed polyanions were ... [more ▼]

Branched polyethyleneimine (PEI) was sulfonated by reaction with chloropropanesulfonylchloride and phosphonated by reaction with phosphorous acid and formaldehyde. The accordingly formed polyanions were used as doping agents for polypyrrole (PPy). The amount of doping polyanions into thin films of PPy was measured by Rutherford back-scattering. These films were tested for their capacity to extract uranyl ions from liquid wastes of low level activity. The uranium content was determined by neutron activation analysis, autoradiography, and gravimetry of uranium oxide after calcination. The resistance against static and dynamic leachings was also estimated. [less ▲]

Detailed reference viewed: 26 (4 ULg)
Full Text
Peer Reviewed
See detailNew system for complexation of uranyl ions from liquid wastes of low-level activity: Polypyrrole doped with complexing polyanions
Leroy, Danielle ULg; Martinot, Lucien; De Becker, Michaël ULg et al

in Journal of Applied Polymer Science (2000), 77(6), 1230-1239

Polymer composites consisting of polypyrrole doped by uranyl complexing polyanions [i.e., poly(2-acrylamidoglycolic acid) and poly(2-acrylamido-2-methyl-1-propanesulfonic acid)] were electrochemically ... [more ▼]

Polymer composites consisting of polypyrrole doped by uranyl complexing polyanions [i.e., poly(2-acrylamidoglycolic acid) and poly(2-acrylamido-2-methyl-1-propanesulfonic acid)] were electrochemically synthesized. Bulk material and thin layers strongly adhering to inert supporting electrodes were prepared. These composites were used to precipitate uranyl ions from simulated radioactive wastes. Among different experimental techniques used for the analysis of uranium immobilized in the composites, the Rutherford backscattering of cu particles proved efficient in thin layers. Leaching tests confirmed the persistence of the uranium complexation in the solid composites. [less ▲]

Detailed reference viewed: 26 (6 ULg)
Full Text
Peer Reviewed
See detailElectrochemical study of the uranium exchange by polypyrrole-based resins
Jérôme, Christine ULg; Martinot, Lucien; Jérôme, Robert ULg

in Journal of Applied Polymer Science (1999), 74(14), 3473-3484

Electrochemical control of the binding of uranium ions by redox active polypyrrole resins was studied. The experimental conditions for this binding were optimized with respect to the uranium ions to be ... [more ▼]

Electrochemical control of the binding of uranium ions by redox active polypyrrole resins was studied. The experimental conditions for this binding were optimized with respect to the uranium ions to be fixed, the resin, and the solution. [less ▲]

Detailed reference viewed: 29 (3 ULg)
Full Text
Peer Reviewed
See detailPolymerization-filled composites prepared with highly active filler-supported Al/Ti/Mg catalysts. II. Properties of homogeneous polyethylene-based
Hindryckx, François; Dubois, Philippe; Jérôme, Robert ULg et al

in Journal of Applied Polymer Science (1997), 64(3), 439-454

Polyethylene-based composites have been prepared by ethylene polymerization with a Al/Ti/Mg catalyst previously deposited on the surface of kaolin (Satintone W/W and Satintone 5) or barite.(1) Molecular ... [more ▼]

Polyethylene-based composites have been prepared by ethylene polymerization with a Al/Ti/Mg catalyst previously deposited on the surface of kaolin (Satintone W/W and Satintone 5) or barite.(1) Molecular weight (M(w)) of the polyethylene matrix has been estimated from melt viscosity under steady shear flow and compared to the value measured by size exclusion chromatography. Tensile stress and strain, Young modulus, and impact energy have been measured in relation to the matrix molecular weight and the filler content. The effect of the main polymerization parameters, such as the Al/Ti/Mg composition, the addition of a transfer agent, e.g., an alpha-olefin or hydrogen, have also been investigated. These tensile and impact properties have been compared to composites of the same composition but prepared by melt blending of the filler and the preformed polyolefin. As a rule, the polymerization-filled composites have an improved mechanical strength compared to the analogues prepared by melt blending. [less ▲]

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailPolymerization-filled composites prepared with highly active filler-supported Al/Ti/Mg catalysts. I. Synthesis of homogeneous polyethylene-based composites
Hindryckx, François; Dubois, Philippe; Jérôme, Robert ULg et al

in Journal of Applied Polymer Science (1997), 64(3), 423-438

When it is attached onto the surface of an inorganic filler (kaolin, barite), the (BuO)4Ti/BuMgOct/EtAlCl2/Et3Al system is a highly efficient and very promising catalyst for the production of high ... [more ▼]

When it is attached onto the surface of an inorganic filler (kaolin, barite), the (BuO)4Ti/BuMgOct/EtAlCl2/Et3Al system is a highly efficient and very promising catalyst for the production of high-performance polyethylene-based composites. The surface concentration of the hydroxyl groups, the Al/Ti/Mg ratio, and the purity of the reagents have a major effect on the catalyst efficiency and molecular weight, crystallinity, and physico-mechanical properties of the final composite. Under ca. 4 bar partial pressure of ethylene in heptane at 60°C, the optimum Al/Ti/Mg catalyst composition is 120/0.75/10, the efficiency of which is as high as 300 kgPE/(gTi × h) in the presence of kaolin particles (Satintone W/W). The effect of transfer agents, such as hydrogen and 1-octene, and purity of the -olefin has been investigated. Actually, the catalyst efficiency is increased in the presence of both hydrogen and octene. Scanning Electron Microscopy (SEM) has shown that the ethylene was polymerized from the filler surface. Special attention has also been paid to the effect of size, density, and surface acidity of the filler particles. The surface of basic filler has to be treated in order to become an efficient catalyst carrier. [less ▲]

Detailed reference viewed: 8 (2 ULg)