Results 111 to 120 of about 10,132 (279)
Polyolefin ductile-brittle transition temperature predictions by machine learning
Frontiers in MaterialsPolymers show a transition from ductile-to brittle fracture behavior at decreasing temperatures. Consequently, the material toughness has to be determined across wide temperature ranges in order to determine the Ductile-Brittle Transition Temperature ...
Florian Kiehas +4 more
doaj +1 more source
Rheological Characterization and Multi‐Regime Viscosity Modeling of Diluted Polyethylene Mixtures
Polymer Engineering &Science, EarlyView.This study maps the flow behavior of low‐density polyethylene in a recycling solvent from dilute solutions to entangled melts. By integrating time–concentration and time–temperature superposition, and coupling three complementary rheometry methods, a unified semiempirical model accurately predicts steady‐shear viscosity over nine decades of viscosity ...
Johannes Krug +7 more
wiley +1 more source
Modern computer aided approaches to rationalize and predict olefin polymerization catalysis
Machine learning (ML) predictors are hailed as tools that could help faster development of better performing catalysts. This vision rests on the capability of ML-predictors to identify which catalyst structures outperform known ones.
Luigi Cavallo, Christian Ehm
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Polymer Engineering &Science, EarlyView.Recycled nonwoven face masks are transformed into polymer feedstocks for injection molding, film extrusion, and additive manufacturing. Rheological behavior links composition to processability, enabling material selection and blending strategies.
Daniele Battegazzore +4 more
wiley +1 more source
, 2010 The present invention relates to cross-linked polyolefin aerogels in simple and fiber-reinforced composite form. Of particular interest are polybutadiene aerogels.
Lee, Je Kyun, Gould, Gerogle L.
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FluidsPour point depressants (PPDs) based on functionalized polyolefins were obtained and evaluated for their efficiency in pour point reducing of Kumkol waxy crude oil (Kazakhstan), which contains 15.2 wt.% paraffin and has a pour point of +17 °C. An ethylene–
Assel Begimova +4 more
doaj +1 more source
Pretreatment Effects of Conventional and Reactive Extrusion on LLDPE Waste Pyrolysis
Polymer Engineering &Science, EarlyView.Schematic overview of the pyrolysis study using original and pretreated LLDPE waste samples. Pretreatment was performed via twin‐screw extrusion at 450°C: without additives (REX), with peroxide (REX‐RO2), or with polypropylene (REX–PP). All four samples underwent pyrolysis at 450°C–475°C for 15–45 min.
Yasmin Fialho Siqueira +8 more
wiley +1 more source
Surface-modified polyolefin fibers
, 2016 The present invention relates to surface-modified polyolefin fibers, the use of these fibers in hydraulic binder compositions, hydraulic binder compositions containing these fibers and a method for reinforcing hydraulic binder ...
PATELLI, ALESSANDRO +5 more
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Enzymes and methods of use for biodegrading polyolefin-derived polymers
, 2022 The invention refers to the use of an enzyme from the wax worm (Galleria mellonella larvae) saliva which has the unexpected capacity of oxidizing and depolymerizing untreated polyolefin-derived polymers, such as polyethylene (PE), at room temperature (RT)
Bertocchini, Federica +2 more
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Macromolecular Materials and EngineeringDiimine Pd catalysts have been known to promote the living polymerization of olefins. Treatment of the living polyolefin with carbon monoxide followed by the addition of alcohols or amines results in alkoxycarbonylation or aminocarbonylation of the ...
Daisuke Takeuchi +2 more
doaj +1 more source