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  • 09월 11일 00시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제124회 학술발표회 및 총회 Synthesis of Structure Controlled Polysilsesquioxanes and its applications

등록일
2019년 8월 29일 18시 04분 01초
접수번호
1910
발표코드
POLY1-4 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 17시 : 10분
발표형식
심포지엄
발표분야
Polymer Chemistry - Special Symposium by Mid-career Polymer Synthesis Scientists
저자 및
공동저자
Kyung-Youl Baek
Center for Materials Architecturing, Korea Institute of Science and Technology, Korea

Polysilsesquioxanes (PSQ) comprise of a class of inorganic-organic hybrid materials that exhibit unique physical and chemical properties unrealized in purely organic or inorganic sources. These materials have shown advantageous properties such as excellent thermal stability, low dielectric constant, good mechanical properties, chemical resistance, and even biocompatibility. Of the three known structural classes of PSQs: random branched sols, polyhedral oligomeric silsesquioxanes (POSS), and ladder-like polysilsesquioxanes (LPSQ), only POSS and LPSQ can be characterized to be of controlled structures, where POSS generally possess oligomeric three-dimensional cage structures while a hypothetical LPSQ is a polymeric analogue with linear, double-strained siloxane backbone. However, the synthesis for these controlled structures often required restricted and cumbersome reaction steps with experienced techniques, because of high reactivity of alkylsiloxane monomers. In this presentation, I will show the synthetic feasibility of these structure controlled poly(phenylsilsesquioxane) using a mild base catalyst systems at room temperature to give T12-Phenyl POSS or ladder-like poly(phenylsilsesquioxane) (LPPSQ) by control of initial phenyltrimethoxysilane (PTMS) concentration in excellent yields (Scheme 1). In addition, some applications will be shown in the fields required specific properties of PSQs.


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