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NGO, Chi Thanh,NGUYEN, Thi Ngoc Mai,NGUYEN, Duy Dat,LE, Hoang Ba Huyen,LE, Van Cuong,LE, Thi Binh Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.9
The study aims to investigate factors affecting enterprise's satisfaction and loyalty toward the Social Security's online public services, looking at the case of Thanh Hoa province, Vietnam. This study employs samples with 216 enterprises that use online public system of Thanh Hoa province's Social Security. The research model is closely linked to the SERVQUAL model developed by Parasuraman, Zeithaml and Berry (1988). We propose 23 scales that constitute the quality of service, three scales that constitute Customer Satisfaction and three components that constitute Customer Loyalty. This study use the tool of Exploratory Factor Analysis (EFA), Cronbach's Alpha test, Confirm Factor Analysis (CFA) and Structural Equation Modeling (SEM) in order to address the question of satisfaction and loyalty. The result shows that the factor with the most impact is Reliability, next is Capacity of staffs, Tangibles, Attitude of staffs, and the least impacting factor is Empathy; moreover, the results also show that Satisfaction has a strong impact on Customer Loyalty. The findings of this study suggest that Thanh Hoa province's Social Security should: (i) strengthen the reliability of online service system; (ii) build capacity for staffs; (iii) develop the responsiveness of electronic transactions systems; and (iv) improve the empathy of staffs.
Mai, Thanh Binh,Tran, Thi Nga,Bach, Long Giang,Kim, Dong Woo,Park, Jong Myung,Lim, Kwon Taek American Scientific Publishers 2014 Journal of Nanoscience and Nanotechnology Vol.14 No.11
<P>The covalent attachment of poly(2-hydroxyethyl methacrylate) on ZnO nanoparticles (NPs) has been achieved by ARGET ATRP. The polymer chains were grown from the surface of ATRP-initiator modified ZnO NPs with a copper (II) catalyst under activation of zerovalent copper as a reducing agent. FT-IR, FE-SEM, TEM and TGA were employed for the characterization of the nanocomposites. GPC was used to determine the molecular weight and PDI of the cleaved polymer. The covalent attachment of polymer chains onto the surface of ZnO NPs was sufficiently confirmed by FT-IR. In addition, the formation of the polymer encapsulating ZnO cores was demonstrated from TEM and SEM images. It was found that the growing of polymer brushes from the ZnO surface could be induced even though the catalyst amount was reduced to 10 ppm without loss of inherent control manner. This report contributed to demonstrate the versatility and feasibility of ATRP-based surface-initiated polymerization for the preparation of inorganic/polymer nanocomposites.</P>
Thanh Binh Mai,Thi Nga Tran,김동우,임권택,홍성수,박찬 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.1
A facile route for covalent functionalization of silica (SiO2) nanoparticles with poly(methylmethacrylate) (PMMA) has been investigated. The surfaces of the SiO2 nanoparticles were treatedwith 2-bromo-2-methyl-N-[3-(trimethoxysilyl)propyl] propanamide to introduce the initiator moietieson the surface. Subsequently, activators regenerated by using electron transfer atom transferradical polymerization (ARGET ATRP) of methyl methacrylate were employed for the preparationof SiO2/PMMA nanocomposites with a CuBr2/ N,N,N0,N00,N00-pentamethyldiethylenetriaminecatalyst system and a tin(II) 2-ethylhexanoate reducing agent. The modification of SiO2 was confirmedby surface analyses including Fourier transfer infrared spectroscopy and X-ray photoelectronspectroscopy. The morphology of the nanocomposites was investigated by using field-emission scanningelectron microscopy and transmission electron microscopy. A thermogravimetric analysis wasused to evaluate the thermal properties and the grafting density. The colloidal stability of silicananoparticles in a common organic solvent was explicitly shown to have been remarkably improvedby the grafting process.