• Title/Summary/Keyword: ABS

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Effect of Polymer Wrapping on the Properties of ABS/MWNT Nanocomposites (고분자 래핑(wrapping)에 의한 전처리가 ABS/MWNT 나노복합체의 물성에 미치는 영향)

  • Kim, Jung-Hwan;Min, Byung-Gil
    • Textile Coloration and Finishing
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    • v.22 no.1
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    • pp.37-42
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    • 2010
  • ABS/MWNT nanocomposites were prepared by using MWNT wrapped with SAN through melt compounding. Effect of wrapping of MWNT by SAN on the morphology, mechanical and electrical properties of ABS/MWNT were analyzed. It was found that SAN could wrap MWNT effectively indicated by the increased thickness after wrapping, which is presumably due to helical structure of polyacrylonitrile component in a block copolymer of SAN. MWNT was observed to be dispersed more evenly in ABS matrix by SAN wrapping, which resulted in improved tensile properties of the composites. On the other hand, there was little effect on the impact strength and electrical properties of ABS having inherently high impact strength.

Study on the Morphology of the PC/ABS Blend by High Shear Rate Processing (PC/ABS 블렌드의 고속전단성형에 따른 모폴로지 변화에 관한 연구)

  • Lee, Dong Uk;Yong, Da Kyoung;Lee, Han Ki;Choi, Seok Jin;Yoo, Jae Jung;Lee, Hyung Il;Kim, Seon-Hong;Lee, Kee Yoon;Lee, Seung Goo
    • Korean Chemical Engineering Research
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    • v.52 no.3
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    • pp.382-387
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    • 2014
  • The PC/ABS blends were manufactured with high shear rate processing. Changes of the blend morphology were analyzed according to the screw speed and processing time. To find optimal conditions of the high shear rate processing of the PC/ABS blend, blend morphology and size of the dispersed phase, ABS, were observed with a SEM. Also, tensile properties of the PC/ABS blends were measured to investigate the effect of the high shear rate process with the screw speed of 500 rpm to 3000 rpm for processing times of 10s to 40s. Especially, to observe the dispersed phase of the PC/ABS blend clearly, fracture surfaces of the PC/ABS blend were etched with chromic acid solution. As screw speed and processing time increase, dispersed phase size of the PC/ABS blend decreases and mechanical properties of the blend decrease as well. Especially, at screw speed over than 1000 rpm of high shear rate processing, mechanical properties of the PC/ABS blends decrease drastically due to the degradation of the blend during the high shear rate processing. Consequently, the optimal condition of screw speed of the high shear processing of the PC/ABS blend is set at 1000rpm, in this study. Under optimal condition, the PC/ABS blend has relatively high mechanical properties with the relatively stable micro-structure having nanometer scale dispersed phase.

Synthesis of Cyclotriphosphazene Derivatives for Flame Retardants (Cyclotriphosphazene을 이용한 난연제의 합성)

  • Kim, Hae Young;Shin, Young Jae;Ji, Young Jon;Shin, Jae Sup
    • Applied Chemistry for Engineering
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    • v.17 no.2
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    • pp.144-149
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    • 2006
  • Non-halogen flame retardants have been the focus of extensive research because of environmental problems. Hexakisp-henoxycyclotriphosphazene was synthesized in order to use as the flame retardant of ABS resin. And using bisphenol A, the polymers containing a cyclotriphosphazene structure were synthesized in order to also use as the flame retardant of ABS resin. All of the synthesized polymers themselves had the excellent flame retardancy. And as their molecular weight and crosslinking density were increased, the thermal stability was increased. But when the synthesized compounds were used as the flame retardant for ABS resin, the lower molecular weight compound in these compounds showed the better flame retardancy and the better physical properties of ABS resin.

Development of HILS System for Performance Analysis of the ABS ECU for Commercial Vehicles (상용차용 ABS ECU의 성능분석을 위한 HILS 시스템 개발)

  • 황돈하;이기창;전정우;김용주;조정목;조중선
    • Journal of Institute of Control, Robotics and Systems
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    • v.8 no.10
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    • pp.898-906
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    • 2002
  • Antilock Brake System (ABS) is designed to prevent wheels from being locked-up under emergency braking of a vehicle. Therefore it improves directional stability of the vehicle, shortens stopping distance, and enhances maneuvering during braking, regardless of road conditions. Hardware In-the-Loop Simulation (HILS) is an effective tool for design Performance evaluation and test of vehicle subsystems such as ABS, active suspension, and steering systems. This paper describes a HILS model for ABS/ ASR(Acceleration Slip Regulation) system applications. A fourteen degrees-of-freedom vehicle dynamics model is simulated in an alpha-chip processor board. The proposed HILS system is tested with a basic ABS control algorithm. The design and implementation of HILS system for the ABS ECU(Electronic Control Unit) development of commercial vehicle are presented. The results show that the proposed HILS system can be used to test the performance, stability, and reliability of a vehicle under braking.

A Study on Diversification of Financing Method for BTL Private Participation in Infrastructure by Introduction of ABS (자산유동화증권 도입을 통한 BTL 민간투자사업에서의 재원 조달 다양화 방안 연구)

  • Park, Young-Min;Kim, Soo-Yong
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2006.11a
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    • pp.378-383
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    • 2006
  • This study presents the results from an investigation into ABS to revitalize small and medium construction enterprises, and to analyze merits and demerits of ABS introduction using sensitivity analysis some realistic cases. According to some available procedures, this study suggests ABS introduction structure of new education facilities construction in BTL projects of two different types. In order to analyze the effectiveness of introduction, a model was built as new education facilities construction in this paper. In addition, this study tried to put a figure on finance interest changes by analyzing changes for earning rates and money that payed by the government. Moreover, this study also presents merits and demerits of ABS introduction.

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Analytical Evaluation of Almost Blank Subframes for Heterogeneous Networks (이종 네트워크를 위한 Almost Blank Subframes의 성능 분석)

  • Kim, Seung-Yeon;Lee, Hyong-Woo;Ryu, Seung-Wan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38B no.4
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    • pp.240-246
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    • 2013
  • In heterogeneous networks, the almost blank subframes (ABS) for inter-cell interference coordination (ICIC), which can be protected from the CCI due to unutilized subframes (i.e., ABS) is proposed. However, the analytical model for ABS-based systems has not been fully studied yet. In this paper, we derive a new analytical model to evaluate the performance of ABS-based systems. In an analytic model, we assume that each carrier in multicarrier systems, such as in OFDMA, is subject to large-scale fading, which is independent of other carriers. As a performance measure, we present the cumulative distribution function (CDF) for the effective SINR. We show the accuracy of the analytical model via simulation results.

Research on Correlation Method of ABS Interior Operational Noise via HILS Rig Test (HILS Rig 시험을 통한 실차 ABS 실내작동소음 예측 기법에 대한 연구)

  • Kim, Seunghwan;Yook, Jiyong;Han, Mingyu;Jeon, Namill
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2013.10a
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    • pp.483-488
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    • 2013
  • The psychoacoustic quality of ABS is now considered more important than before as the focus of recent ABS function is expanded to basic function from typical emergency function. Thus, the automotive parts manufacturing companies are actively working to improve NVH (Noise, Vibration, and Harshness) in ABS module. In terms of time, test place, and cost, however, it is very inefficient to have all the operating noise validation test in real vehicle configuration especially for partially improved ABS module. To contribute to reducing the development period and to grasping the improvements faster, this research presents the study of a correlation to predict ABS operating noise inside vehicle via HILS rig test. The regression equation in this paper was statistically drawn from using Minitab S/W, and based on that equation, the noise spectrum of vehicle interior was analogized.

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Optimization of FSW of Nano-silica-reinforced ABS T-Joint using a Box-Behnken Design (BBD)

  • Mahyar Motamedi Kouchaksarai ;Yasser Rostamiyan
    • Advances in nano research
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    • v.14 no.2
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    • pp.117-126
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    • 2023
  • This experimental study investigated friction stir welding (FSW) of the acrylonitrile-butadiene-styrene (ABS) T-joint in the presence of various nano-silica levels. This study aim to handle the drawbacks of the friction stir welding (FSW) of an ABS T-joint with various quantity of nanoparticles and assess the performance of nanoparticles in the welded joint. Moreover, the relationship between the nanoparticle quantity and FSW was analyzed using response surface methodology (RSM) Box-Behnken design. The input parameters were the tool rotation speed (400, 600, 800 rpm), the transverse speed (20, 30, 40 mm/min), and the nano-silica level (0.8, 1.6, 2.4 g). The tensile strength of the prepared specimens was determined by the universal testing machine. Silica nanoparticles were used to improve the mechanical properties (the tensile strength) of ABS and investigate the effect of various FSW parameters on the ABS T-joint. The results of Box-Behnken RSM revealed that sound joints with desired characteristics and efficiency are fabricated at tool rotation speed 755 rpm, transverse speed 20 mm/min, and nano-silica level 2.4 g. The scanning electron microscope (SEM) images revealed the crucial role of silica nanoparticles in reinforcing the ABS T-joint. The SEM images also indicated a decrease in the nanoparticle size by the tool rotation, leading to the filling and improvement of seams formed during FSW of the ABS T-joint.

Recycling of PC/ABS Blend Used in Instrument Panel of Automotive (자동차 Instrument Panel에 사용된 PC/ABS계의 재활용)

  • Lee, Chang Hyung;Jung, In Kwon;Lee, Yong Moo;Oak, Sung Hyun;Choi, Hyeong Ki
    • Applied Chemistry for Engineering
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    • v.10 no.1
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    • pp.118-123
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    • 1999
  • The recycle of the polycarbonate(PC)/acrylonitrile-butadiene-styrene(ABS) separated from the instrument panel (In-Panel) of the automotive was investigated. The small amount of polyurethane(PU) foam contained in the separated PC/ABS decreased the mechanical properties of the recycled PC/ABS. However, it is found that the PU foam formed the dispered phase of small particles at high temperature ($260^{\circ}C$) under high shear of the twin extruder, whereas it formed the big particles at low extrusion temperature ($220^{\circ}C$). The mechanical properties of the recycled PC/ABS extruded at high temperature was better than those at low temperature, which enabled the recycled PC/ABS seperated from In-Panel to be applied to the radiator grille without the addition of the compatibilizers or virgin PC/ABS. This was ascribed to the smaller particle sizes of the PU foam formed at high extrusion temperature under high shear.

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