<i>Ortho</i>-Functionalized Dibenzhydryl Substituents in <i>α</i>-Diimine Pd Catalyzed Ethylene Polymerization and Copolymerization
Sterically bulky diarylmethyl-based ligands have received increasing attention in the field of late-transition-metal catalyzed olefin polymerization. <i>Ortho</i>-substituents may have a significant impact on the performance of diarylmethyl-based <i>α</i>-diimine Pd catalysts...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/11/2509 |
| _version_ | 1797549586781306880 |
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| author | Qasim Muhammad Wenmin Pang Fuzhou Wang Chen Tan |
| author_facet | Qasim Muhammad Wenmin Pang Fuzhou Wang Chen Tan |
| author_sort | Qasim Muhammad |
| collection | DOAJ |
| description | Sterically bulky diarylmethyl-based ligands have received increasing attention in the field of late-transition-metal catalyzed olefin polymerization. <i>Ortho</i>-substituents may have a significant impact on the performance of diarylmethyl-based <i>α</i>-diimine Pd catalysts. In this contribution, a series of <i>α</i>-diimine Pd catalysts bearing <i>ortho</i>-methoxyl/hydroxyl functionalized dibenzhydryl units were prepared, characterized, and investigated in ethylene polymerization and copolymerization with methyl acrylate (MA). The catalytic performances were improved by introducing more <i>ortho</i>-substituents. The catalysts exhibited good thermal stabilities at high temperatures, producing branched polyethylenes. The catalysts bearing hydroxyl groups possessing intramolecular H-bonding, resulted in slightly higher incorporation ratios of MA unit when compared with the catalysts bearing methoxyl groups. |
| first_indexed | 2024-03-10T15:16:41Z |
| format | Article |
| id | doaj.art-416989a6c42a4ae98008b32aefb3bf8a |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T15:16:41Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-416989a6c42a4ae98008b32aefb3bf8a2023-11-20T18:50:47ZengMDPI AGPolymers2073-43602020-10-011211250910.3390/polym12112509<i>Ortho</i>-Functionalized Dibenzhydryl Substituents in <i>α</i>-Diimine Pd Catalyzed Ethylene Polymerization and CopolymerizationQasim Muhammad0Wenmin Pang1Fuzhou Wang2Chen Tan3Department of Polymer Science and Engineering, University of Science and Technology of China, Anhui, Hefei 230601, ChinaDepartment of Polymer Science and Engineering, University of Science and Technology of China, Anhui, Hefei 230601, ChinaKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, Anhui, Hefei 230601, ChinaKey Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, Anhui, Hefei 230601, ChinaSterically bulky diarylmethyl-based ligands have received increasing attention in the field of late-transition-metal catalyzed olefin polymerization. <i>Ortho</i>-substituents may have a significant impact on the performance of diarylmethyl-based <i>α</i>-diimine Pd catalysts. In this contribution, a series of <i>α</i>-diimine Pd catalysts bearing <i>ortho</i>-methoxyl/hydroxyl functionalized dibenzhydryl units were prepared, characterized, and investigated in ethylene polymerization and copolymerization with methyl acrylate (MA). The catalytic performances were improved by introducing more <i>ortho</i>-substituents. The catalysts exhibited good thermal stabilities at high temperatures, producing branched polyethylenes. The catalysts bearing hydroxyl groups possessing intramolecular H-bonding, resulted in slightly higher incorporation ratios of MA unit when compared with the catalysts bearing methoxyl groups.https://www.mdpi.com/2073-4360/12/11/2509olefin polymerizationα-diiminepolar monomerpalladiumdibenzhydryl |
| spellingShingle | Qasim Muhammad Wenmin Pang Fuzhou Wang Chen Tan <i>Ortho</i>-Functionalized Dibenzhydryl Substituents in <i>α</i>-Diimine Pd Catalyzed Ethylene Polymerization and Copolymerization Polymers olefin polymerization α-diimine polar monomer palladium dibenzhydryl |
| title | <i>Ortho</i>-Functionalized Dibenzhydryl Substituents in <i>α</i>-Diimine Pd Catalyzed Ethylene Polymerization and Copolymerization |
| title_full | <i>Ortho</i>-Functionalized Dibenzhydryl Substituents in <i>α</i>-Diimine Pd Catalyzed Ethylene Polymerization and Copolymerization |
| title_fullStr | <i>Ortho</i>-Functionalized Dibenzhydryl Substituents in <i>α</i>-Diimine Pd Catalyzed Ethylene Polymerization and Copolymerization |
| title_full_unstemmed | <i>Ortho</i>-Functionalized Dibenzhydryl Substituents in <i>α</i>-Diimine Pd Catalyzed Ethylene Polymerization and Copolymerization |
| title_short | <i>Ortho</i>-Functionalized Dibenzhydryl Substituents in <i>α</i>-Diimine Pd Catalyzed Ethylene Polymerization and Copolymerization |
| title_sort | i ortho i functionalized dibenzhydryl substituents in i α i diimine pd catalyzed ethylene polymerization and copolymerization |
| topic | olefin polymerization α-diimine polar monomer palladium dibenzhydryl |
| url | https://www.mdpi.com/2073-4360/12/11/2509 |
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