Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based <i>α</i>-Diimine Nickel Catalyst
<b>The</b> development of earth-abundant nickel-based catalysts is currently one of the greatest challenges for the straightforward synthesis of functionalized polyolefins. With environmental protection concerns, controllable copolymerizations of ethylene with biosourced comonomers deriv...
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2025-05-01
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| author | Handou Zheng Junsong Wang Zonglin Qiu Chunyu Feng Haotian Zhou Guangshui Tu Haiyang Gao |
| author_facet | Handou Zheng Junsong Wang Zonglin Qiu Chunyu Feng Haotian Zhou Guangshui Tu Haiyang Gao |
| author_sort | Handou Zheng |
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| description | <b>The</b> development of earth-abundant nickel-based catalysts is currently one of the greatest challenges for the straightforward synthesis of functionalized polyolefins. With environmental protection concerns, controllable copolymerizations of ethylene with biosourced comonomers derived from castor oil, such as methyl 10-undecenoate (U-COOMe), 10-undecen-1-ol (U-OH), or 10-undecenyl bromide (U-Br), were realized using <i>α</i>-diimine nickel catalyst (<b>Ni-DBB</b>) with dibenzobarrelene backbone. Catalyst <b>Ni-DBB</b> was highly tolerant toward polar comonomers, and functional polyethylenes were successfully prepared. The influences of the polar group, temperature, and comonomer concentration were studied in detail. Catalyst <b>Ni-DBB</b> was able to catalyze the copolymerization of ethylene with U-OH to afford high-molecular-weight (~180 kg/mol) functional polyethylene in a controlled fashion. NMR analysis showed that the produced functional polyethylenes were highly branched and had broad melting peaks ranging from 0 to 30 °C. Water contact angle (WCA) measurements showed that the surface of the obtained hydroxyl-functionalized polyethylene changed from hydrophobic to hydrophilic with the introduction of the comonomer U-OH. |
| format | Article |
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| institution | OA Journals |
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| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-50df84f4d6a2476cb9c481f9c57bcd142025-08-20T02:33:06ZengMDPI AGMolecules1420-30492025-05-013011240210.3390/molecules30112402Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based <i>α</i>-Diimine Nickel CatalystHandou Zheng0Junsong Wang1Zonglin Qiu2Chunyu Feng3Haotian Zhou4Guangshui Tu5Haiyang Gao6School of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China<b>The</b> development of earth-abundant nickel-based catalysts is currently one of the greatest challenges for the straightforward synthesis of functionalized polyolefins. With environmental protection concerns, controllable copolymerizations of ethylene with biosourced comonomers derived from castor oil, such as methyl 10-undecenoate (U-COOMe), 10-undecen-1-ol (U-OH), or 10-undecenyl bromide (U-Br), were realized using <i>α</i>-diimine nickel catalyst (<b>Ni-DBB</b>) with dibenzobarrelene backbone. Catalyst <b>Ni-DBB</b> was highly tolerant toward polar comonomers, and functional polyethylenes were successfully prepared. The influences of the polar group, temperature, and comonomer concentration were studied in detail. Catalyst <b>Ni-DBB</b> was able to catalyze the copolymerization of ethylene with U-OH to afford high-molecular-weight (~180 kg/mol) functional polyethylene in a controlled fashion. NMR analysis showed that the produced functional polyethylenes were highly branched and had broad melting peaks ranging from 0 to 30 °C. Water contact angle (WCA) measurements showed that the surface of the obtained hydroxyl-functionalized polyethylene changed from hydrophobic to hydrophilic with the introduction of the comonomer U-OH.https://www.mdpi.com/1420-3049/30/11/2402<i>α</i>-diimine nickelcopolymerizationbiosourced monomersfunctional polyethylene |
| spellingShingle | Handou Zheng Junsong Wang Zonglin Qiu Chunyu Feng Haotian Zhou Guangshui Tu Haiyang Gao Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based <i>α</i>-Diimine Nickel Catalyst Molecules <i>α</i>-diimine nickel copolymerization biosourced monomers functional polyethylene |
| title | Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based <i>α</i>-Diimine Nickel Catalyst |
| title_full | Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based <i>α</i>-Diimine Nickel Catalyst |
| title_fullStr | Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based <i>α</i>-Diimine Nickel Catalyst |
| title_full_unstemmed | Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based <i>α</i>-Diimine Nickel Catalyst |
| title_short | Controlled Copolymerization of Ethylene and Biosourced Comonomers Using Dibenzobarrelene-Based <i>α</i>-Diimine Nickel Catalyst |
| title_sort | controlled copolymerization of ethylene and biosourced comonomers using dibenzobarrelene based i α i diimine nickel catalyst |
| topic | <i>α</i>-diimine nickel copolymerization biosourced monomers functional polyethylene |
| url | https://www.mdpi.com/1420-3049/30/11/2402 |
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