Citation: Shi-Xuan Yang, Zi-Yu Fan, Feng-Yu Zhang, Si-Hao Li, Yi-Xian Wu. Functionalized Copolymers of Isobutylene with Vinyl Phenol: Synthesis, Characterization, and Property[J]. Chinese Journal of Polymer Science, ;2019, 37(9): 919-929. doi: 10.1007/s10118-019-2329-6 shu

Functionalized Copolymers of Isobutylene with Vinyl Phenol: Synthesis, Characterization, and Property

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Corresponding author: Yi-Xian Wu, wuyx@mail.buct.edu.cn
Received Date: 17 June 2019
Revised Date: 1 January 2019
Available Online: 24 July 2019

The random copolymers of isobutylene (IB) with polar comonomers of 4-acetoxystyrene (ACS) or 4-tert-butoxystyrene (TBO), P(IB-co-ACS) and P(IB-co-TBO), could be successfully synthesized via cationic copolymerization with FeCl₃-based initiating system. The kinetics of the cationic copolymerization process was in situ investigated by inserting a diamond probe into the reaction system by ATR-FTIR spectroscopy. The chemical structure and incorporation content of polar comonomers in the copolymers were characterized by GPC with RI/UV dual detectors and ¹H-NMR spectroscopy. The corresponding functionalized random copolymers of IB with vinyl phenol P(IB-co-POH) carrying phenolic hydroxyl side groups could be further prepared via the complete hydrolysis of acetoxyl side groups in P(IB-co-ACS) or tert-butoxyl side groups in P(IB-co-TBO) copolymers. The functionalized P(IB-co-POH) copolymers became hydrophilic with water contact angle (WCA) of ca. 80° for the self-assembly in hot water, compared to the hydrophobic polyisobutylene with WCA of ca. 110°. The functionalized P(IB-co-POH) copolymers also displayed an excellent self-healing property due to the interaction of intermolecular hydrogen bonding and formation of three dimentional supramolecular networks from phenolic hydroxyl side groups. Furthermore, P(IB-co-POH) copolymers also provided a good matrix for the homogeneous dispersion for silica nanoparticles due to the formation of hydrogen bonding between copolymer chains and silica nanoparticles.
- Cationic polymerization,
- Isobutylene,
- Copolymers,
- Polar monomer,
- Functionalized polyisobutylenes
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