Issue 14, 2019

Synthesis of high molecular weight isobutylene-α-methylstyrene copolymers containing alkenyl groups with a half sandwich scandium initiator system under mild conditions

Abstract

Cationic copolymerizations of isobutylene (IB) and two alkenyl functionalized α-MeSt derivatives, respectively, 4-(2-methyl-2-propenyl)-α-methylstyrene (FSt1) and 4-(2-propenyl)-α-methylstyrene (FSt2), catalyzed by the half sandwich scandium complex, [(C5Me4SiMe3)Sc(CH2SiMe3)2THF]/[Ph3C][B(C6F5)4], at −35 °C produced a new family of high molecular weight random copolymers with pendant alkenyl groups (Mn: 12.3–18.7 × 104 g mol−1, C[double bond, length as m-dash]C: 1–20 mol%). Through post-modification, epoxy functionalized copolymers were obtained efficiently, demonstrating that the resulting copolymers with pendant alkenyl groups can serve as functional polyisobutylene based rubbery materials.

Graphical abstract: Synthesis of high molecular weight isobutylene-α-methylstyrene copolymers containing alkenyl groups with a half sandwich scandium initiator system under mild conditions

Supplementary files

Article information

Article type
Communication
Submitted
10 Dec 2018
Accepted
28 Feb 2019
First published
28 Feb 2019

Polym. Chem., 2019,10, 1724-1729

Synthesis of high molecular weight isobutylene-α-methylstyrene copolymers containing alkenyl groups with a half sandwich scandium initiator system under mild conditions

K. Yang, H. Niu, H. Yu, J. Dong, J. Wang, J. Yu, K. Shen and Y. Li, Polym. Chem., 2019, 10, 1724 DOI: 10.1039/C8PY01749B

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