Related Experiment Video
Updated: Jun 28, 2025
11:45
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
14.4K
Hyperbranched Vitrimer for Ultrahigh Energy Dissipation
Lin Cheng1, Jun Zhao1, Zhongqiang Xiong1
1Advanced Rheology Institute, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
Angewandte Chemie (International Ed. in English)
|April 24, 2024
Summary
Hyperbranched vitrimers (HBVs) with dense pendant chains and dynamic crosslinks offer superior vibration and noise damping. This novel polymer design achieves high energy dissipation across wide temperature and frequency ranges.
Area of Science:
- Polymer Science
- Materials Science
- Chemical Engineering
Background:
- Polymers are effective damping materials due to molecular chain friction, suppressing vibrations and noise.
- Current damping strategies involve broadening glass transition or adding relaxation components, but struggle with maintaining dynamic properties.
- Achieving high damping efficiency via structural control remains a challenge in polymeric materials.
Purpose of the Study:
- To develop high-performance polymeric damping materials using a novel structural design.
- To investigate hyperbranched vitrimers (HBVs) with dense pendant chains and dynamic crosslinked networks for enhanced energy dissipation.
- To explore a weak dynamic transesterification reaction for creating advanced damping materials.
Main Methods:
- Preparation of HBVs using poly(hexyl methacrylate-2-(4-ethenylphenyl)-5,5-dimethyl-1,3,2-dioxaborinane) (P(HMA-co-ViCL)) copolymers.
- Utilizing a novel, weak dynamic transesterification reaction between carboxyl and boronic acid ester groups.
- Characterization of the structure-property relationships in the synthesized HBVs.
Main Results:
- Confirmed a novel, weak dynamic transesterification for HBV preparation.
- Demonstrated that P(HMA-co-ViCL) 20k-40-60 HBV exhibits ultrahigh energy dissipation.
- Observed superior performance over broad frequency and temperature ranges due to synergistic effects.
Conclusions:
- Dense pendant chains and weak dynamic covalent crosslinks are key to high-performance HBV damping.
- The proposed design concept offers a general approach for developing advanced polymeric damping materials.
- These HBVs show significant potential for vibration and noise suppression applications.
