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  • 09월 03일 23시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Mechanochemical Degradation of the Dendronized Polymers Induced by Ultrasound: Discovering the Link Between Degradation Rate and Polymer Side Chain

2018년 8월 30일 11시 41분 27초
POLY.O-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 09시 : 50분
Polymer Chemistry - Oral Presentation for Young Polymer Scientists
저자 및
Ki-Taek Bang, Gregory Peterson1, Tae-Lim Choi*
Division of Chemistry, Seoul National University, Korea
1Chemistry, Seoul National University, Korea
Polymer mechanochemistry has attracted much attention since the mechanical force can induce the chemical reaction to the polymer which cannot be initiated by heat, light, electric and chemical reagent. This allows the researchers to develop unique functional materials such as force sensors, self-reinforcing materials. On the other hand, scientists have studied the effect of fundamental properties of the polymers such as polymer architecture on the mechanochemical reactivity. However, there is still a lack of understanding of the mechanochemical behaviours of the macromolecular chain. One of the most important questions is that how does the side chain size affect the mechanochemical response of the polymers. To exploit the side chain effect, we focused on the dendronized polymers bearing well-defined dendritic side chain, which can be tuned at the molecular level by the proper design. In the presentation, I’ll describe the synthesis of the dendronized polymer composed of the polyphenylene dendron and their degradation behaviour. The systematic studies using the series of the well-defined dendronized polymers revealed that the size of the side chain affects the degradation rate of the polymers. Moreover, we found the unexpected relationship between the molecular weight of the dendron and the degradation rate. Furthermore, the degradation kinetics and multi-angle laser light scattering (MALLS) analysis showed that the chain extension caused by bulky side chains plays an important role in the mechanochemical response of the polymers.