Citation: Shi Chuqi, Liu Shumei, Li Yang, Zhao Jianqing, Huang Haohao. Enhanced mechanical and thermal properties of γ-allyloxymethyl 18-crown-6 and polyimide composites through hydrosilylation crosslinking[J]. Chinese Chemical Letters, ;2019, 30(3): 710-713. doi: 10.1016/j.cclet.2018.11.012 shu

Enhanced mechanical and thermal properties of γ-allyloxymethyl 18-crown-6 and polyimide composites through hydrosilylation crosslinking

School of Materials Science and Engineering, Key Laboratory of Polymer Processing Engineering of the Ministry of Education, South China University of Technology, Guangzhou 510640, China

liusm@scut.edu.cn

psjqzhao@scut.edu.cn

Received Date: 2 August 2018
Revised Date: 20 October 2018
Accepted Date: 12 November 2018
Available Online: 13 March 2018

Figures(5)

The complexation of γ-allyloxymethyl 18-crown-6 (AC6) induced inferior mechanical and thermal properties of polyimide (PI) in spite of lowered dielectric constant (k). To solve this puzzle, tetrakis-(dimethylsiloxy)-silane was employed to crosslink the complex of AC6 and PI (AC6-PI) through hydrosilylation reaction. The crosslinked AC6-PI (SiAC-PI) composites possessed excellent mechanical and thermal properties as well as low k. The tensile strength and fracture energy of SiAC-PI were increased by 87% and 716%, and the glass transition temperature and 5% weight loss temperature elevated 14.5℃ and 38.8℃, respectively, compared with those of AC6-PI. The structure of SiAC-PI was characterized by FTIR spectra, crosslinked density and XRD diffraction patterns.
- Polymeric composites,
- Dielectrics,
- Mechanical properties,
- Thermal properties,
- Hydrosilylation crosslinking
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沈阳化工大学材料科学与工程学院沈阳 110142