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| Type |
Oral Presentation |
| Area |
Oral Presentation for Young Polymer Scientists |
| Room No. |
Room 325C+D |
| Time |
THU 09:50-: |
| Code |
POLY.O-6 |
| Subject |
Mechanochemical Degradation of the Dendronized Polymers Induced by Ultrasound: Discovering the Link Between Degradation Rate and Polymer Side Chain |
| Authors |
Ki-Taek Bang, Gregory Peterson1, Tae-Lim Choi*
Division of Chemistry, Seoul National University, Korea
1Chemistry, Seoul National University, Korea
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| Abstract |
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.
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| E-mail |
bkt1010@snu.ac.kr |
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122nd General Meeting of the KCS