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(아이오도메틸)트리메틸실란을 이용한 2-에티닐피리딘의 무촉매중합
손태관 ( Tae-kwan Son ),강병운 ( Byong-yun Kang ),제갈영순 ( Yeong-soon Gal ),심상연 ( Sang-yeon Shim ) 한국화상학회 2020 한국화상학회지 Vol.26 No.3
(아이오도메틸)트리메틸실란을 이용한 2-에티닐피리딘의 무촉매 중합을 통하여 N-(트리메틸실릴메틸) 피리디늄 아이오다이드를 측쇄로 갖는 새로운 공액구조 고분자를 합성하였다. 이 중합반응은 불균일하게 진행되었으며 중합수율은 95%로 매우 높았지만 생성된 고분자는 중합중 가교화반응으로 대부분의 유기용매에 용해하지 않았다. 합성 고분자의 분자구조를 분석한 결과 이온성 피리딜 치환기를 갖는 해당 고분자가 합성되었음을 확인할 수 있었다. 합성 고분자의 열적 특성과 몰폴로지 등을 TGA, EDX 등의 분석장비로 측정하고 분석하였다. A new ionic polyacetylene with the substituent of N-(trimethylsilylmethyl)pyridinium iodide was synthesized by the non-catalyst polymerization of 2-ethynylpyridine using (iodomethyl)trimethylsilane). The polymerization proceeded heterogeneously to yield 95% of polymer. However, the resulting polymer was insoluble in most organic solvents due to the cross-linking reaction during polymerization. The polymer structure was characterized to have a conjugated backbone system with the designed ionic pyridyl substituents. The thermal and morphological properties of the polymer were measured and discussed.
알루미늄 합금 디스크용 마찰재의 제조 및 그 특성에 관한 연구
손태관 ( Son Tae Gwan ),장상희 ( Jang Sang Hui ),제갈영순 ( Je Gal Yeong Sun ) 한국복합재료학회 2003 Composites research Vol.16 No.4
본 연구는 자동차용 알루미늄 합금 디스크에 적용하기 위한 마찰재 제조에 관한 내용을 제시한 것이다. 최적 마찰재 조성을 확보하기 위하여 섬유, 결합재, 충진재, 마찰 성능 조정재 등으로 분류할 수 있는 각 원재료를 채택, 배합 설계에 의한 마찰재 시편을 제작하였으며 그 특성을 실제 차량 1/5 크기의 브레이크 다이나모미터를 이용하여 평가하였다. 마찰성능을 JASO C406 P1에 준하여 실험한 결과 마찰계수가 0.35~0.38, fade율이 18%였으며, 내 마모성은 JASO C427에 준하여 온도별 마모시험을 실시하였는데 시험 종료후 마찰재의 마모량이 1.6㎜, 디스크 마모량이 0.08㎜ 수준인 우수한 배합 조성을 획득할 수 있었다. 시험 전?후의 마찰재와 알루미늄 합금 디스크의 표면상태는 주사전자현미경을 이용하여 관찰하였다. This article deals with the manufacture and test results of asbestos-free friction material for Aluminium alloy disk. In order to obtain optimum formulation, various formulations of fibres, matrix. modifiers. tillers. etc were designed and evaluated. The constant friction and brake dynamometer tests were performed to know weak and strong point for each friction material. The C21 formulation of various tested formulations exhibited superior friction constant(0.35-38), fade rate (18%) by JASO C406 test mode and maximum wear 1.6 mm. disc wear 0.08 mm by JASO C427 test mode. The surface morphology of Al, alloy disk(before and after test) was observed by Scanning Electron Microscope(SEM) and Image Analyzer.
마찰교반 용접에서 공구의 삽입 깊이와 용접 길이가 L5000-0계 알루미늄 판재에 미치는 영향
손태관(TaeKwan Son) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
15000-0 aluminum alloy plates with thicknesses of 1.4 and 1.0 ㎜ were friction-stir-lap-welded (FSLWed). The influences of the tool plunge depth and welding distance on surface appearance, macrostructure and mechanical properties of the FSLWed plates were experimentally investigated. The tensile shear load of the FSLWed plates was compared with that of the adhesive-bonded plates. Defect-free FSLWed zones were successfully obtained in all the tool plunge depths and the welding distances. The FSLWed zones exhibited the relatively smooth surface morphologies. Under all the FSLWed conditions, the FSLWed zone exhibited higher average hardness than the base metal. In addition, the upper plate exhibited a higher average hardness than the lower plate, although there was no special tendency in spite of the change in the tool plunge depth and the welding distance. The maximum tensile shear load of the FSLWed plates was much higher than that of the adhesive-bonded aluminum alloy plate. Especially, under the FSLW condition of the plunge depth of 1.8 ㎜ and the welding distance of 40 ㎜, the tensile shear load of the FSLWed plate reached a level about 41% greater than that of the adhesive-bonded aluminum alloy plate. In addition, the maximum tensile shear load of the FSLWed plate was increased with the increase of the welding distance.
가진 시험 방법을 활용한 자동차 도어 플레이트 모듈 슬램 내구 평가
김찬중(Kim, Chan-Jung),손태관(Son, Tae-Kwan) 한국소음진동공학회 2012 한국소음진동공학회 논문집 Vol.22 No.10
Slam testing is a mandatory testing process to evaluate the fatigue resistance of a door plate module before delivering it to car makers. This process is very hard job to complete it since the testing facilities are considerably expensive and the required testing time is relatively very long, i.e. more than eight days for a single specimen. In this paper, an accelerated testing method of a door plate module is proposed using vibration test equipment instead of the current one by exposing to the critical excitation of a door glass. Under the proposed excitation method, the similar testing result can be evaluated within less than two hours. The suitability of the proposed testing method was demonstrated by comparing failure modes of both the current testing method and the proposed one.