• (pdf) polymer modification of bentonite: impact of molar

    (PDF) Polymer modification of bentonite: impact of molar

    The potential of polymers to improve the structural stability and hydro-mechanical behaviour of clays with respect to engineering application was demonstrated in several studies.

  • polymer modification of bentonite: impact of molar mass

    Polymer modification of bentonite: impact of molar mass

    Lieske, W.,R. Verst, Gemmina Di Emidio, and W. Baille. 2019. “Polymer Modification of Bentonite: Impact of Molar Mass.” In Proceedings of the XVII ECSMGE-2019.

  • (pdf) characterisation of bentonite polymer for bottom

    (PDF) Characterisation of bentonite polymer for bottom

    Polymer modification of bentonite: impact of molar mass Modification du polymère de la bentonite: impact de la longueur de la chaîne polymère Conference Paper Full-text available

  • effect of polymer molar mass and montmorillonite content

    Effect of polymer molar mass and montmorillonite content

    Generally, the nanoclay dispersions in polymer of different materials reveal rheological and morphological behaviors. In this research, the effects of the sodium montmorillonite and molar mass of the hydrolyzed polyacrylamide were experimentally investigated on the oil recovery factor (Estimation of in-place oil to recoverable oil) at the pore scale using a glass micromodel.

  • prof. dr. ir. gemmina di emidio ghent university

    prof. dr. ir. Gemmina Di Emidio Ghent University

    Polymer modification of bentonite: impact of molar mass W. Lieske, R. Verst, Gemmina Di Impact of wet-dry cycles on the swelling ability and hydraulic conductivity of a polymer modified bentonite Michela De Camillis (UGent),Gemmina Di Emidio (UGent),Adam Bezuijen (UGent) and Ramiro D. Verastegui Flores 11th International Conference on Geosynthetics. Add to list . Conference Paper; P1

  • effects of dispersing foams and polymers on the

    Effects of dispersing foams and polymers on the

    Request PDF Effects of dispersing foams and polymers on the mechanical behaviour of clay pastes The use of soil conditioners during excavation with earth pressure balance machines offers a

  • hydraulic conductivity and swelling ability of a polymer

    Hydraulic conductivity and swelling ability of a polymer

    Hydraulic conductivity and swelling ability of a polymer modified bentonite subjected to wet–dry cycles in seawater Article in Geotextiles and Geomembranes 44(5) · June 2016 with 247 Reads

  • adsorption behavior of cationic polymers on bentonite

    Adsorption behavior of cationic polymers on bentonite

    Adsorption behavior of cationic polymers on bentonite . Article in Journal of Thermal Analysis and Calorimetry 94(2):579-583 · November 2008 with 25 Reads How we measure 'reads' A 'read' is

  • poly(ethylene oxide)/laponite nanocomposites via melt

    Poly(ethylene oxide)/Laponite nanocomposites via melt

    2005-01-26· This usually involves the intercalation of non-ionic, low molar mass components, which show a strong chemical compatibility with the intercalating polymer. The originally present small cations remain located at the surface of the silicate layers. Ishida et al. reported on the modification of a bentonite clay with hexadecylamine. They studied

  • papers by keyword: bentonite scientific.net

    Papers by Keyword: Bentonite scientific.net

    The results show that the water-retention capacity of bentonite decreases with the increase of salt concentration in aqueous solution; And at the same mass concentration, the water-retention capacity in MgCl 2 solution decreases most, followed by CaCl 2 and the least is NaCl. The water-retention capacity of bentonite in saline water is related with ENa +. The larger the ENa + is, the better

  • preparation of nanocomposites of polypropylene

    Preparation of Nanocomposites of Polypropylene

    To obtain the masterbatches and dilutions, two PP grades were used to analyze the influence of molar mass (MM) on clay dispersion. The screw rotation varied from 30 to 200 rpm and the clay contain

  • bentonite scientific.net

    Bentonite Scientific.Net

    Absorption of As-received Na-bentonite was lower than absorption of As-received absorbent polymer. The preservation had been also increased with absorbent polymer was obtained. Na-bentonite compact with absorbent polymer ware investigated the good absorption and preservation when the Na-bentonite compact with absorbent polymer 40 mass %.

  • molar mass distribution an overview sciencedirect topics

    Molar Mass Distribution an overview ScienceDirect Topics

    The narrow molar mass distribution of metallocene i-PP directly translates into narrow stress relaxation time spectra of the molten polymer. In a spinning process, where the polymer melt is stretched and subsequently crystallized, this means a more rapid decay of the stress in the fibers, and as a consequence allows higher spinning speeds and

  • polymer-enhanced biomacromolecules sciencedirect

    Polymer-enhanced biomacromolecules ScienceDirect

    PEGylated proteins have been used to determine the impact of polymer molar mass, coupling chemistry, and modification extent on protein function. PEGylation is thought to extend lifetime in vivo by sterically hindering the access of large biological molecules to the surface of the protein . The ligand molar mass and size steric effects of the

  • influence of the compatibilizer polarity and molar mass

    Influence of the compatibilizer polarity and molar mass

    Previous article in issue: Studies on structure property relationship in a polymer–clay nanocomposite film based on (PAN)8LiClO4. Previous article in issue: Studies on structure property relationship in a polymer–clay nanocomposite film based on (PAN)8LiClO4 Next article in issue: Morphology and mechanical properties of a novel amorphous polyamide/nanoclay nanocomposite

  • influence of the compatibilizer polarity and molar mass

    Influence of the compatibilizer polarity and molar mass

    The full text of this article hosted at iucr.org is unavailable due to technical difficulties.

  • the effects of low molar mass diluents on the

    The effects of low molar mass diluents on the

    The effects of low molar mass diluents on the microstructure of ionomers. J. J. Fitzgerald. Polymer Science Program and Department of Chemical Engineering, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269‐3136. Search for more papers by this author. R. A. Weiss . Polymer Science Program and Department of Chemical Engineering, University of Connecticut, 97

  • the society of rheology: journal of rheology: table

    The Society of Rheology: Journal of Rheology: Table

    We explain quantitatively the effects of molar mass of solvent and of polymer concentration on the elongational viscosity in the investigated concentration range from 10% to 100% (melt), based solely on the linear-viscoelastic characterization. For polystyrene dissolved in oligomeric styrene with molar mass larger than a quarter of the

  • impact modification of poly(caprolactam)

    Impact modification of poly(caprolactam)

    impact toughness; deformation mechanism) INTRODUCTION The impact toughness of nylons can be improved by plasticizing with water 1'2'3 or by blending with an elastomer *-8. The toughening effect of water in nylon-6 is the result of a lowering of the yield stress of the polymer 3.

  • advanced treatment of produced water from asp (alkali

    Advanced treatment of produced water from ASP (alkali

    References. F. Zhang, F. Wang, J. Ouyang, H. Zhang, The development and application of a demulsifier used for ASP flooding–produced liquid from the Xing 2 area of

  • modification of bentonite with different surfactants

    Modification of Bentonite with Different Surfactants

    Modification of Bentonite with Different Surfactants and Substitute as a Mordant in Wool Natural Dyeing Hossein Barani Department of Carpet, University of Birjand, Birjand, Iran. *Author for correspondence; e-mail: [email protected] Received: 23 April 2016 Accepted: 30 July 2016 ABSTRACT Surfactant-clay interaction is very important for the development of their applications in different

  • simple surface modification of poly(dimethylsiloxane) via

    Simple Surface Modification of Poly(dimethylsiloxane) via

    2019-05-14· Its molar mass is 600, and contains 60–70% PEG. The PDMS segment solubilizes the additive within the elastomer matrix during preparation and then anchors the additive in the cured PDMS. It

  • surface modification of bentonites. iii. sol-gel

    Surface modification of bentonites. III. Sol-gel

    2005-12-01· The critical coagulation concentration of NaCl was increased by the polymer addition, but the increase was modest (from 8–12 mmol/l to 50 mmol/l). The changes of the colloidal state, the flow behaviour and the salt coagulation reveal the sensitive interplay between stabilization mechanisms (electrostatic, steric) and destabilization effects (bridging, charge compensation, depletion

  • effects of organoclay modification on microstructure

    Effects of organoclay modification on microstructure

    The full text of this article hosted at iucr.org is unavailable due to technical difficulties.

  • modification and shaping of carbon nanotubes with an

    Modification and shaping of carbon nanotubes with an

    AbstractThe paper reviews the modification and shaping of electron beam irradiation on carbon nanotubes (CNTs), as well as how this could be potentially useful for electron beam modification of nanotubes. The influence of irradiation on the mechanical property, electrical property and field effect of CNTs is discussed. Several examples are given with particular emphasis on the cutting, shaping

  • effects of intercalated mono-, di-

    Effects of Intercalated Mono-, Di-

    The present study investigates the effects of intercalation process of protonated primary, secondary and tertiary amines on structural and surface characteristics of sodium form of bentonite clay. For this purpose, sodium form of bentonite clay was prepared and then exchanged with mono-, di-and triethanolammonium cations via intercalation mechanism into the interlayer space of the clay.

  • absolute, on-line monitoring of molar mass during

    Absolute, On-Line Monitoring of Molar Mass during

    To perform on-line monitoring of the absolute weight-averaged mass, Mw, of the polymers produced in a polymerization reaction, refractometer (RI), ultraviolet absorbance (UV), and time-dependent static light scattering (TDSLS) detectors were placed in series, and a diluted stream of reactant solution was made to flow through them. The technique allows rapid determination of time-dependent

  • bentonite

    Bentonite

    Rheological and tensile properties and processability of the composites thus prepared were studied. Results showed a strong newtonean character of extrudates of recycled PET and higher viscosities and a more pseudoplastic behavior and improved reprocessability when bentonite was added to PET. Furthermore, inclusion of the filler increased its

  • thermal stability of quaternary phosphonium modified

    Thermal Stability of Quaternary Phosphonium Modified

    Organically modified layered silicates (OLS) with high thermal stability are critical for synthesis and processing of polymer layered silicate nanocomposites (PLSN). In the current study, the non-oxidative thermal degradation chemistry of alkyl and aryl quaternary phosphonium-modified montmorillonites (P-MMT) was examined using TGA combined with pyrolysis/GC-MS. The morphology evolution at

  • impact of polymer microstructure on the self-assembly

    Impact of Polymer Microstructure on the Self-Assembly

    Comparing to the effects due solely to the hydrophobe distribution sequence, the increments in structural parameters of the amphipol self-assemblies are only slightly enhanced when concurrently improving the polymer isotacticity or increasing the polymer molar mass. All results point to the critical impact of hydrophobe distribution sequence on

  • influence of the clay content and the polysulfone molar

    Influence of the clay content and the polysulfone molar

    2013-06-15· Read "Influence of the clay content and the polysulfone molar mass on nanocomposite membrane properties, Applied Surface Science" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • mechanical properties of polymers concordia university

    Mechanical Properties of Polymers Concordia University

    Increasing strain rate causes the SAME effects as decreasing T. Mechanical Properties of Polymers modifications of the spherulite structure. Dr. M. Medraj Mech. Eng. Dept. Concordia UniversityMECH 221 lecture 20/13 Melting and Glass Transition Temperature For amorphous and semicrystalline polymers, this is a critical aspect of designing with polymers. • Crystalline polymers: there is

  • carbon dioxide retention on bentonite clay adsorbents

    Carbon Dioxide Retention on Bentonite Clay Adsorbents

    X-ray diffraction results revealed that the basal spacing of bentonite clay after modification with amines was increased with the molar mass of amine used, while BET results showed an inverse effect of the molar mass of amines on the surface area of the synthesized materials.

  • buy journal of polymer materials : an international

    Buy Journal of Polymer Materials : An International

    Journal of Polymer Materials-An International Journal is published quarterly (4 issues per year), which covers broadly most of the important and fundamental areas of Polymer Science and Technology.It reports reviews on current topics and original research results on synthesis of monomers and polymers, polymer analysis, characterization and testing, properties of polymers, structure-property

  • effect of layered silicates on rheological and mechanical

    Effect of layered silicates on rheological and mechanical

    AbstractThe effect of surface modified fillers based on montmorillonite on rheological and mechanical properties and thermal stability of high-molar mass polydimethylsiloxane matrix was evaluated. Silicone rubber/clay composites were prepared via homogenisation on open two roll-mill followed by torque measurement at two different temperatures.

  • linear viscoelastic behavior of symmetric and asymmetric

    Linear Viscoelastic Behavior of Symmetric and Asymmetric

    Linear viscoelastic properties of linear and star-branched polymer solutions are investigated experimentally and theoretically. Two series of high molar mass 1,4-polyisoprene linear and three-arm star polymers blended with marginally unentangled linear chains of the same chemistry form the focus of this study. We find that, irrespective of polymer architecture, unentangled linear molecules

  • surface modification of bentonites. iii. sol-gel

    Surface modification of bentonites. III. Sol-gel

    The colloidal state (sol, flocs, gels) of Na-montmorillonite dispersions (from bentonite from Bavaria, Germany) was adjusted by the addition of poly(ethylene oxides

  • investigation of the differential thermodynamic analysis

    Investigation of the Differential Thermodynamic Analysis

    Compositions based on bentonite and acrylic copolymers were obtained. The dependence and improvement of the thermal characteristics of polymer compositions was also observed in the study of materials based on poly (styrene-co-acrylamide) with bentonite clay of Navbakhor Deposit. The use of bentonites as fillers significantly increased the thermal properties of the resulting composites and to

  • modification with alkyl chains and the influence

    Modification with alkyl chains and the influence

    polymer was the starting product in one series of modifica-tion reactions, either the variation of the chain length of the modification reagent or the variation of the degree of modifi-cation (DM). The molar masses and the Tg of the two starting polymers P1a-OH and P1b-OH are given in Tab. 1 and Tab. 2. The determination of the molar mass was

  • melting and crystallization of polyethylene of different

    Melting and Crystallization of Polyethylene of Different

    Crystallization and melting of n-paraffins of chain lengths up to C60H122 can be largely reversible, and practically no supercooling is seen in differential scanning calorimetry (DSC) and temperature-modulated DSC (TMDSC). To find the changes with chain length for this effect, polyethylene fractions of oligomers of mass 560, 1150, and 2150 Da and a polymer of mass 15 520 Da were analyzed.

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