The Experts below are selected from a list of 3502755 Experts worldwide ranked by ideXlab platform
Peng Zhao - One of the best experts on this subject based on the ideXlab platform.
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density measurement for Polymers by magneto archimedes levitation simulation and experiments
Polymer Testing, 2017Co-Authors: Peng Zhao, Chengqian Zhang, Jianzhong FuAbstract:Abstract In a magneto-Archimedes levitation device, a polymer can be levitated in a paramagnetic medium, and its equilibrium levitated height is mainly related to its density. Here, a novel density measurement method for Polymers via magneto-Archimedes levitation is proposed, in which the relationship between the density and the levitated height is determined through numerical simulation. COMSOL software is employed to simulate the distribution of magnetic field in the device, and FLUENT-EDEM multiphase software is adopted to predict the polymer's levitated height. A 3rd-order polynomial equation is fitted by simulation results for density calculation. Several experiments with different devices, different magnets, different mediums, and various Polymers were carried out to verify the proposed method. Experimental results showed that the proposed method has high accuracy (0.0060–0.0130 g/cm3) in density measurements for small polymer samples (∼25 mm3). In general, the proposed method has prospects of broad application in polymer density-based testing.
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measuring densities of Polymers by magneto archimedes levitation
Polymer Testing, 2016Co-Authors: Peng Zhao, Chengqian Zhang, Jianzhong FuAbstract:Abstract In magneto-Archimedes levitation, a polymer can be levitated to a balanced position, and its levitation height is mainly related to the density of the polymer. Here, a novel method for measuring the density of Polymers based on magneto- Archimedes levitation is proposed. For a designed measurement device, an equation can be fitted by a series of experiments with standard density glass beads. Then, the polymer's density can be calculated via the equation. In this paper, a device with magnets at a distance of 60 mm was chosen as an example. Experimental results showed that the proposed method could measure all types of polymer with an accuracy of 0.002–0.01 g/cm3. Moreover, the proposed method can clearly distinguish between Polymers with small density differences (
Jianzhong Fu - One of the best experts on this subject based on the ideXlab platform.
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density measurement for Polymers by magneto archimedes levitation simulation and experiments
Polymer Testing, 2017Co-Authors: Peng Zhao, Chengqian Zhang, Jianzhong FuAbstract:Abstract In a magneto-Archimedes levitation device, a polymer can be levitated in a paramagnetic medium, and its equilibrium levitated height is mainly related to its density. Here, a novel density measurement method for Polymers via magneto-Archimedes levitation is proposed, in which the relationship between the density and the levitated height is determined through numerical simulation. COMSOL software is employed to simulate the distribution of magnetic field in the device, and FLUENT-EDEM multiphase software is adopted to predict the polymer's levitated height. A 3rd-order polynomial equation is fitted by simulation results for density calculation. Several experiments with different devices, different magnets, different mediums, and various Polymers were carried out to verify the proposed method. Experimental results showed that the proposed method has high accuracy (0.0060–0.0130 g/cm3) in density measurements for small polymer samples (∼25 mm3). In general, the proposed method has prospects of broad application in polymer density-based testing.
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measuring densities of Polymers by magneto archimedes levitation
Polymer Testing, 2016Co-Authors: Peng Zhao, Chengqian Zhang, Jianzhong FuAbstract:Abstract In magneto-Archimedes levitation, a polymer can be levitated to a balanced position, and its levitation height is mainly related to the density of the polymer. Here, a novel method for measuring the density of Polymers based on magneto- Archimedes levitation is proposed. For a designed measurement device, an equation can be fitted by a series of experiments with standard density glass beads. Then, the polymer's density can be calculated via the equation. In this paper, a device with magnets at a distance of 60 mm was chosen as an example. Experimental results showed that the proposed method could measure all types of polymer with an accuracy of 0.002–0.01 g/cm3. Moreover, the proposed method can clearly distinguish between Polymers with small density differences (
Chengqian Zhang - One of the best experts on this subject based on the ideXlab platform.
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density measurement for Polymers by magneto archimedes levitation simulation and experiments
Polymer Testing, 2017Co-Authors: Peng Zhao, Chengqian Zhang, Jianzhong FuAbstract:Abstract In a magneto-Archimedes levitation device, a polymer can be levitated in a paramagnetic medium, and its equilibrium levitated height is mainly related to its density. Here, a novel density measurement method for Polymers via magneto-Archimedes levitation is proposed, in which the relationship between the density and the levitated height is determined through numerical simulation. COMSOL software is employed to simulate the distribution of magnetic field in the device, and FLUENT-EDEM multiphase software is adopted to predict the polymer's levitated height. A 3rd-order polynomial equation is fitted by simulation results for density calculation. Several experiments with different devices, different magnets, different mediums, and various Polymers were carried out to verify the proposed method. Experimental results showed that the proposed method has high accuracy (0.0060–0.0130 g/cm3) in density measurements for small polymer samples (∼25 mm3). In general, the proposed method has prospects of broad application in polymer density-based testing.
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measuring densities of Polymers by magneto archimedes levitation
Polymer Testing, 2016Co-Authors: Peng Zhao, Chengqian Zhang, Jianzhong FuAbstract:Abstract In magneto-Archimedes levitation, a polymer can be levitated to a balanced position, and its levitation height is mainly related to the density of the polymer. Here, a novel method for measuring the density of Polymers based on magneto- Archimedes levitation is proposed. For a designed measurement device, an equation can be fitted by a series of experiments with standard density glass beads. Then, the polymer's density can be calculated via the equation. In this paper, a device with magnets at a distance of 60 mm was chosen as an example. Experimental results showed that the proposed method could measure all types of polymer with an accuracy of 0.002–0.01 g/cm3. Moreover, the proposed method can clearly distinguish between Polymers with small density differences (
Michael P Shaver - One of the best experts on this subject based on the ideXlab platform.
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An aromatic/aliphatic polyester prepared via ring-opening polymerisation and its remarkably selective and cyclable depolymerisation to monomer
Polymer Chemistry, 2020Co-Authors: Jarret P Macdonald, Michael P ShaverAbstract:The ring-opening polymerisation of 2,3-dihydro-5H-1,4-benzodioxepin-5-one (2,3-DHB) with aluminium salen or organocatalysts gives polyester homoPolymers and coPolymers with L-lactide or rac-β-butyrolactone that contain both aromatic and aliphatic linkages, the first Polymers with an aromatic ring in the backbone prepared by this key method. The same Al salen catalyst catalyses a remarkably selective depolymerisation to monomer under modified reaction conditions. The process may be cycled to repeatedly recycle polymer to monomer and maintain the polymer's low dispersity.
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an aromatic aliphatic polyester prepared via ring opening polymerisation and its remarkably selective and cyclable depolymerisation to monomer
Polymer Chemistry, 2016Co-Authors: Jarret P Macdonald, Michael P ShaverAbstract:The ring-opening polymerisation of 2,3-dihydro-5H-1,4-benzodioxepin-5-one (2,3-DHB) with aluminium salen or organocatalysts gives polyester homoPolymers and coPolymers with L-lactide or rac-β-butyrolactone that contain both aromatic and aliphatic linkages, the first Polymers with an aromatic ring in the backbone prepared by this key method. The same Al salen catalyst catalyses a remarkably selective depolymerisation to monomer under modified reaction conditions. The process may be cycled to repeatedly recycle polymer to monomer and maintain the polymer's low dispersity.
David Bilby - One of the best experts on this subject based on the ideXlab platform.
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effect of polymer aggregation on the open circuit voltage in organic photovoltaic cells aggregation induced conjugated polymer gel and its application for preventing open circuit voltage drop
ACS Applied Materials & Interfaces, 2011Co-Authors: Eun Jeong Jeong, Hui Joon Park, David BilbyAbstract:To investigate the structure-dependent aggregation behavior of conjugated Polymers and the effect of aggregation on the device performance of conjugated polymer photovoltaic cells, new conjugated Polymers (PVTT and CN-PVTT) having the same regioregularity but different intermolecular packing were prepared and characterized by means of UV−vis spectroscopy and atomic force microscopy (AFM). Photovoltaic devices were prepared with these Polymers under different polymer-aggregate conditions. Polymer aggregation induced by thermal annealing increases the short circuit current but provides no advantage in the overall power conversion efficiency because of a decrease in the open circuit voltage. The device fabricated from a pre-aggregated polymer suspension, acquired from ultrasonic agitation of a conjugated polymer gel, showed enhanced performance because of better phase separation and reduced recombination between polymer/PCBM.
