Chemical and Biomolecular Engineering Faculty Research

Title

Real-time Ftir Monitoring of the Mechanism of Initiation of Isobutylene Polymerizations by Epoxide/lewis Acid Systems

Document Type

Article

Publication Date

6-1-2008

Abstract

Real-time Fourier Transformation Infrared (FTIR) spectroscopy with a fiber optic transmission probe (TR) was used to monitor the polymerization of isobutylene (IB) initiated by α-methylstyrene epoxide (MSE) and 1,2-epoxi-2,4,4-trimethylpentane (TMPO-1) in conjunction with TiCl4 and BCl3. In the presence of an equimolar amount of BCl3, MSE and TMPO-1 underwent ring opening via SN1 mechanism. In contrast to TiCl4-coinitiated reactions, no oligoether formation via SN2 mechanism was observed. TMPO-1 with excess BCl3initiated IB polymerization, yielding a telechelic PIB carrying α-primary OH and ω-tertiary Cl functionalities with 70% initiator efficiency. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 3611–3618, 2008

Publication Title

Journal of Polymer Science Part A: Polymer Chemistry

Volume

46

Issue

11

First Page

3611

Last Page

3618