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Trinh Tung, Ngo,Yu, Young-Jun,Kim, Kyungkon,Joo, Sung-Hoon,Park, Yongsup,Jin, Jung-Il Wiley Subscription Services, Inc., A Wiley Company 2005 Journal of polymer science Part A, Polymer chemist Vol.43 No.4
<P>It was demonstrated that a series of copolymers consisting of 1,4-phenylenevinylene (PV) and 1,4-phenylene-1,2-ethanediyl (PE) units could be prepared from a single monomer, p-(methoxymethyl)benzyl chloride, via the chemical vapor deposition polymerization (CVDP) method. The composition of the copolymers could be varied simply by altering the monomer activation temperature. The higher the temperature, the lower the content of the PV unit. The photo (PL)- and electroluminescence (EL) properties of the copolymers that revealed a blueshift when compared with PPV strongly depend on the amount of the PE units incorporated. The external quantum efficiencies of the electroluminescence devices having the configuration of ITO/PEDOT-PSS/copolymer/Al-Li were higher than that of PPV, which can be ascribed to the improved confinement of excitons. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 742–751, 2005</P> <B>Graphic Abstract</B> <P>It was demonstrated that a series of copolymers consisting of 1,4-phenylenevinylene (PV) and 1,4-phenylene-1,2-ethanediyl (PE) units could be prepared from a single monomer, p-(methoxymethyl)benzyl chloride via the chemical vapor deposition polymerization (CVDP) method. The compositions of the copolymers could be varied by simply altering the monomer activation temperature. The higher the temperature, the lower the content of the PV unit became. <img src='wiley_img/0887624X-2005-43-4-POLA20537-gra001.gif' alt='wiley_img/0887624X-2005-43-4-POLA20537-gra001'> </P>
Preparation and Characterization of Nanocomposite Based on Polyaniline and Graphene Nanosheets
Ngo Trinh Tung,Tran Van Khai,전민희,이여진,정회일,방정환,손대원 한국고분자학회 2011 Macromolecular Research Vol.19 No.2
Polymer nanocomposites based on polyaniline (PANi) and graphene nanosheets (GNS) modified with poly(sodium 4-styrensulfonate) (PSS-GNS) were prepared, and their structure and properties were investigated by atomic force microscopy (AFM), scanning electron microscopy (SEM), UV-vis spectroscopy, ATR-IR spectroscopy,X-ray diffraction, elemental analysis, thermogravimetric analysis (TGA) and electrical conductivity measurements. The results revealed that for the PANi/PSS-GNS nanocomposites, the disordered structure of PSS-GNS was fully destroyed and PSS-GNS exists in the form of a single GNS or stacked PSS-GNS elements in a PANi matrix. PSS-GNS was partly covered by PANi due to hydrogen bonding that occurs between the PSS-GNS and PANi. By incorporating PSS-GNS, the electrical conductivity of PANi increased linearly from 0.84 S/cm for neat PANi to 4.96S/cm for a PANi/PSS-GNS (5%) nanocomposite. The thermal stability of the PANi was also improved significantly to approximately 100 oC by the nanocomposite.
A Study on the Effect of Distributed Generation of the Reconfiguration of Distribution Networks
Nguyen, Tung Linh,Trinh, Trong Chuong,Truong, Viet Anh The Korean Institute of Electrical Engineers 2017 Journal of Electrical Engineering & Technology Vol.8 No.1
Distributed generation (DG) in the future will play an important role in the electricity supply systems, in wich can provide DG capacity from a few hundred kW to tens of MW. However, it is connected to the local power grid, DG will have certain influence on the power quality of the power grid. One of the most significant effects is that they will change the configuration of the local power grid as well as affecting the operation mode of the grid. This paper presents a method of finding the optimal open loop, analyzing and selecting the appropriate mode of operation to reduce power losses of power distribution networks that includes DG.
A Study on the Effect of Distributed Generation of the Reconfiguration of Distribution Networks
Nguyen Tung Linh,Trinh Trong Chuong,Truong Viet Anh 대한전기학회 2017 Journal of Electrical Engineering & Technology Vol.12 No.4
Distributed generation (DG) in the future will play an important role in the electricity supply systems, in wich can provide DG capacity from a few hundred kW to tens of MW. However, it is connected to the local power grid, DG will have certain influence on the power quality of the power grid. One of the most significant effects is that they will change the configuration of the local power grid as well as affecting the operation mode of the grid. This paper presents a method of finding the optimal open loop, analyzing and selecting the appropriate mode of operation to reduce power losses of power distribution networks that includes DG.
Investigation of flexural behavior of a prestressed girder for bridges using nonproprietary UHPC
Pham, Hoa D.,Khuc, Tung,Nguyen, Tuan V.,Cu, Hung V.,Le, Danh B.,Trinh, Thanh P. Techno-Press 2020 Advances in concrete construction Vol.10 No.1
Ultra-high-performance concrete (UHPC) is recognized as a promising material in future civil engineering projects due to its outstanding mechanical and durability properties. However, the lack of local UHPC materials and official standards, especially for prestressed UHPC structures, has limited the application of UHPC. In this research, a large-scale prestressed bridge girder composed of nonproprietary UHPC is produced and investigated. This work has two objectives to develop the mixing procedure required to create UHPC in large batches and to study the flexural behavior of the prestressed girder. The results demonstrate that a sizeable batch of UHPC can be produced by using a conventional concrete mixing system at any precast factory. In addition, incorporating local aggregates and using conventional mixing systems enables regional widespread use. The flexural behavior of a girder made by this UHPC is investigated including flexural strength, cracking pattern and development, load-deflection curve, and strain and neutral axis behaviors through a comprehensive bending test. The experimental data is similar to the theoretical results from analytical methods based on several standards and recommendations of UHPC design.
Choi, Jang-Sik,Trinh, Tung X.,Yoon, Tae-Hyun,Kim, Jongwoon,Byun, Hyung-Gi Elsevier 2019 CHEMOSPHERE - Vol.217 No.-
<P><B>Abstract</B></P> <P>A quasi-QSAR model was developed to predict the cell viability of human lung (BEAS-2B) and skin (HaCaT) cells exposed to 21 types of metal oxide nanomaterials. A wide range of toxicity datasets obtained from the S2NANO (www.s2nano.org) database was used. The data of descriptors representing the physicochemical properties and experimental conditions were coded to quasi-SMILES. In particular, hierarchical cluster analysis (HCA) and min-max normalization method were respectively used in assigning alphanumeric codes for numerical descriptors (e.g., core size, hydrodynamic size, surface charge, and dose) and then quasi-QSAR model performances for both methods were compared. The quasi-QSAR models were developed using CORAL software (www.insilico.eu/coral). Quasi-QSAR model built using quasi-SMILES generated by means of HCA showed better performance than the min-max normalization method. The model showed satisfactory statistical results ( R a d j 2 for the training dataset: 0.71–0.73; R a d j 2 for the calibration dataset: 0.74–0.82; and R a d j 2 for the validation dataset: 0.70–0.76).</P> <P><B>Highlights</B></P> <P> <UL> <LI> A Quasi-QSAR for cell viability (%) of BEAS-2B and HaCaT cells exposed to metal oxide nanomaterials was developed. </LI> <LI> Cell viability was estimated using quasi-SMILES for physicochemical properties and experimental conditions. </LI> <LI> The quasi-SMILES codes were generated by hierarchical cluster analysis (HCA). </LI> <LI> The statistical quality of quasi-QSAR was good. </LI> </UL> </P>