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John Dewey의 교육이론이 교육현장에 주는 시사점
천정미(Chun Jung Mee),박미령(Park Mi Ryung) 경성대학교 인문과학연구소 2005 인문학논총 Vol.10 No.-
The purpose of this paper is to find some suggestions to the field of education from John Dewey's educational theory. Dewey emphasized that the aim of education is the growth of intelligence of a learner. The curriculum should be derived from the experience and related to the present experience of learner. The method of education progress into the five levels with the process of reflective thinking. To the field of education, Dewey's educational theory suggests the followings. First, the aim of education should be the cultivation of learner's ability to adapt to the society and the cultivation of the thinking ability as his growth. Second, the curriculum should be the materials which help a thinking process and give rise to thought to a learner. Third, the method of education should be a method of cultivation of the thinking ability of a learner.
Allyl 3-(trimethoxy silyl)propyl ether를 이용한 수성 폴리우레탄 아크릴레이트 실란의 합성 및 물성 연구
박큰별(Kuenbyeol Park),천정미(Jung Mi Cheon),정부영(Boo Young Jeong),정일두(Ildoo Chung),최민지(Min Ji Choi),임경은(Gyeong Eun Lim),천제환(Jae Hwan Chun) 한국고분자학회 2018 폴리머 Vol.42 No.3
수성접착제의 접착특성을 향상시키기 위하여 allyl 3-(trimethoxy silyl)propyl ether(ATSE)를 합성하고 이를 waterborne polyurethane acrylate에 적용하여 접착제를 제조하였다. FTIR과 ¹H NMR을 사용하여 ATSE의 합성을 확인하였다. 또한 FTIR을 통해 수성 폴리우레탄 아크릴레이트 실란(WPAS)의 합성을 확인하였고 DSC와 TGA를 사용하여 WPAS의 열적특성을 확인하였다. DSC와 TGA 분석을 통하여 ATSE의 함량이 증가할수록 soft segment의 열용량이 감소하고, 열안정성이 향상되는 것을 확인하였다. 또한 ATSE 함량에 따른 접착특성을 평가한 결과, ATSE 의 함량이 2.91 wt%일 때에 상태접착력 및 내수성이 가장 우수하였다. In order to improve adhesion properties and water resistance of waterborne polyurethane adhesives, allyl 3-(trimethoxy silyl)propyl ether (ATSE) was prepared. Waterborne polyurethane acrylate silanes (WPAS) was synthesized using ATSE. Their chemical structures were confirmed by FTIR and ¹H NMR, and their thermal properties were characterized by DSC and TGA. Analyses of DSC and TGA confirmed that heat capacity of soft segment decreased and thermal stability improved with increasing ATSE. Also, adhesion properties and water resistance were evaluated by UTM. In the adhesion properties and water resistance test, the maximum values were obtained by WPAS containing 2.91 wt% ATSE.