Abstract Microplastics are frequently detected in the gastrointestinal tracts of aquatic organisms worldwide. A number active and passive pathways have been suggested for fish, including confusion microplastic particles with prey, accidental uptake while foraging transfer through food chain, but a holistic understanding influencing factors is still lacking. The aim study was to investigate theories identify relevant biotic factors, as well certain plastic properties, affecting intake fish....

A correlation between morphology development and rheology of polystyrene nanocomposites based upon organophilic layered silicates (organoclay) such as fluoromicas was found a function the silicate modification. Organoclay obtained by means ion exchange clay with protonated amine-terminated polystyrenes molar mass Mn = 121 5 800 g/mol. Only when applying shear forces during melt compounding organoclay modified high (PS), individual platelets 1 nm diameter 600 length were obtained. Dispersions...

Against a background of increasing energy demand and rising fuel prices, hybrid-electric propulsion systems have the potential to significantly reduce consumption in aviation industry, particularly lighter sectors. By taking advantage both electric motor internal combustion engine, provide not only benefit saving but also reduction takeoff noise emission levels. This research considers design sizing process system for single-seat demonstrator aircraft, experimental derivation engine map,...

Poly(propylene) compounds containing organophilic layered nanosilicates were prepared by means of melt extrusion at 210°C in order to investigate the influence maleic anhydride-grafted poly(propylene) (PP-g-MA) as a compatibilizer on morphology development and rheological properties. It was found that addition PP-g-MA leads strong exfoliation silicate layers within matrix investigated WAXS. This process is associated with build up an unstable probed dynamic rheology violation...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFullerene-End-Capped Polystyrenes. Monosubstituted Polymeric C60 DerivativesChristine Weis, Christian Friedrich, Rolf Muelhaupt, and Holger FreyCite this: Macromolecules 1995, 28, 1, 403–405Publication Date (Print):January 1995Publication History Published online1 May 2002Published inissue 1 January 1995https://doi.org/10.1021/ma00105a062RIGHTS & PERMISSIONSArticle Views398Altmetric-Citations86LEARN ABOUT THESE METRICSArticle Views are the...

Herein we report on the solvent-free free radical grafting of styrene homo- and copolymers onto functionalized graphene nanosheets without requiring initiator addition. The key intermediate is an organophilic stearylamine-modified graphite oxide (Stearyl-GO), containing both olefinic unsaturation stable radicals. According to online tracking C-centered radicals by time-resolved EPR spectroscopy, concentration markedly increases during early stage polymerization depleted as viscosity builds...

Novel families of polystyrene carbon nanocomposites and graphene brushes were prepared by means free radical styrene grafting using sulfur-functionalized (S-FG) as macro-chain-transfer agent. Two strategies examined for growing chains onto graphite oxide (GO), stearylamine-modified GO (Stearyl-GO), thermally reduced (TRGO): (i) chain transfer with novel thiol-functionalized graphenes (ii) RAFT-mediated polymerization dithiourethane-, dithioester- dithiocarbonate-functionalized graphenes....

The present study examines the effectiveness of applying Artificial Intelligence methods in an automotive production environment to predict unknown lead times a non-cycle-controlled area. Data structures are analyzed identify contextual features and then preprocessed using one-hot encoding. Methods selection focuses on supervised machine learning techniques. In methods, regression classification evaluated. Continuous based target size distribution is not feasible. Classification analysis...

Poly(ethene-co-norbornene) was synthesized in toluene using Me2Si(Me4Cp)(NtBu)TiCl2 activated with methylaluminoxane (MAO) as catalyst. We found that at 50 °C the molecular weight increases time for up to 1 h, and very little chain transfer occurs; thus, copolymerization can be considered quasi-living. The quasi-living nature requires high norbornene feed fractions; it is more pronounced low temperatures short reaction times. Mw/Mn = 1.3 (Mn 100 kg/mol) lowest polydispersity index obtained...

In the explosively growing aquaculture industry, challenge of sustainability includes a requirement to produce more fish than are consumed by stock. A promising avenue research is substitution meal in feeds with plant protein. However, there inherent risks development such feeds, and serious consideration should be given not only nutritional content, but also mechanical quality resulting faecal wastes. The present study uses plate on rheometer running different flow modes (creep,...

Dielectric barrier discharge (DBD) plasma actuators are a promissing tool for active flow control applications. In order to determine the time-resolved body force induced by DBD actuator, which was driven 9.5 kHz sinusoidal signal, has be captured with high spatial and temporal resolution. For this purpose we applied laser Doppler velocity profile sensor measurements of two-component field Lagrangian acceleration. A resolution 7.3 µs 40 µm achieved. We present local behaviours actuator....

Viscoelastic properties of linear, hydroxyl-functional polymers are only little understood with respect to the effect functional group interactions. Melt rheology and thermal phase transitions linear polyethers (polyglycerol, linPG-OH) their methylated analogues (linPG-OMe) in a broad molecular weight range (Mn = 1–100 kg/mol) low polydispersities (PDI) have been investigated as general model for functionality hydrogen bond We provide detailed insight into rheodynamics nonentangled...

Thermally induced position errors are one of the main error sources on workpiece caused by behavior machine tool. In today’s industrial environment, correction thermal is usually based simple regression approaches, where characteristic diagrams for generated experimentally. The performance these approaches only valid corresponding load regimes, which often results in insufficient quality practical applications. Consequently, there a limited benefit or even deterioration if an inapplicable...

In this article it is shown that the relaxation time spectrum can be analytically related to molecular weight distribution regarding a recently derived generalized mixing rule. This analytical relation greatly reduces computational effort determine from spectrum. rule parameter β has been introduced. controversially discussed in literature. The value of determined theoretically by [The Theory Polymer Dynamics (Clarendon, Oxford, 1986)] as β=1 and [Europhys. Lett. 5, 437–442 (1988); 6, 475...

Abstract In a versatile modular scaffold system, gradient nonwovens of in situ crosslinked gelatin nanofibers (CGN), fabricated by reactive electrospinning, are laminated with perforated layers and thermoplastic non‐crosslinked biodegradable polyesters. The addition glyoxal to solution non‐toxic solvent mixture consisting acetic acid, ethyl acetate, water (5:3:2 w/w/w) enables the crosslinking during electrospinning. use this fluorine‐free system eliminates need post‐treatment purification...

Abstract The viscoelastic properties of fourteen syndio‐ and isotactic polypropylenes (PPs) were measured in the molten state at several temperatures by means oscillatory rheometry. Metallocene catalysis allows control molecular mass both PP families provides narrow distributions (MMD) with a polydispersity about 2. validity Arrhenius WLF equations for was checked. Syndio‐ follow behavior but exhibit different activation energies flow. From dynamic shear moduli, parameters determined...

The goal of this study was to investigate if a three dimensional matrix, loaded homogeneously with Schwann cells and the neurotrophic factor LIF (leukemia inhibitory factor), enhances regeneration in biodegradable nerve guidance channel as compared non-structured cell suspensions. Therefore 10 mm gap buccal branch rat's facial bridged tubular PCL (poly-epsilon-caprolactone) conduits filled no cells, fibrin/Schwann matrix or added LIF. Four weeks after defects were histological morphometric...