Citation: Xiang-Yang Song, Qiong Ma, Hao-Bo Yuan, Zheng-Guo Cai. Synthesis of Hydroxy-functionalized Ultrahigh Molecular Weight Polyethylene Using Fluorenylamidotitanium Complex[J]. Chinese Journal of Polymer Science, ;2018, 36(2): 171-175. doi: 10.1007/s10118-018-2046-6 shu

Synthesis of Hydroxy-functionalized Ultrahigh Molecular Weight Polyethylene Using Fluorenylamidotitanium Complex

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

Corresponding author: Zheng-Guo Cai, caizg@dhu.edu.cn
Received Date: 25 August 2017
Accepted Date: 21 September 2017
Available Online: 16 November 2017

Copolymerizations of ethylene and 1-dodecene were conducted with a series of ansa-fluorenylamidodimethyltitanium complexes, [t-BuNSiMe₂Flu]TiMe₂ (1a), [t-BuNSiMe₂(2, 7-^tBu₂Flu)]TiMe₂ (1b), and[(1-adamantyl)NSiMe₂(2, 7-^tBu₂Flu)]TiMe₂ (1c) activated by modified methylaluminoxane. The activity increased by the introduction of the alkyl groups on the fluorenyl and amido ligands, and 1c produced the highest molecular weight copolymers. Complex 1c also promoted copolymerization of ethylene and ⁱBu₃Al protected 10-undecen-1-ol with high activity (~2000 kg·mol^-1·h^-1), affording hydroxy-functionalized ultrahigh molecular weight polyethylene. The hydroxy content of the copolymers obtained was controllable by changing comonomer feed ratio. The introduction of a small amount of hydroxy group can alter the surface properties of polyethylene.
- Single-site catalyst,
- Ethylene,
- Polar monomer,
- Copolymerization,
- Hydroxy-functionalized polyethylene
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