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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH FRONT

RAFT Copolymerization of Styrene/Divinylbenzene in Supercritical Carbon Dioxide

Gabriel Jaramillo-Soto A and Eduardo Vivaldo-Lima A B
+ Author Affiliations
- Author Affiliations

A Facultad de Química, Departamento de Ingeniería Química, Universidad Nacional Autónoma de México, 04510 México D.F., México.

B Corresponding author. Email: vivaldo@unam.mx

Australian Journal of Chemistry 65(8) 1177-1185 https://doi.org/10.1071/CH12291
Submitted: 16 June 2012  Accepted: 20 July 2012   Published: 6 August 2012

Abstract

An experimental study on the kinetics of the reversible addition–fragmentation chain transfer (RAFT) dispersion copolymerization with crosslinking of styrene and divinylbenzene in supercritical carbon dioxide (scCO2) is presented. This is the first time that such a controlled polymer network synthesis is carried out in scCO2. S-Thiobenzoyl thioglycolic acid (TBTGA) and dibenzoyl peroxide were used as RAFT agent and initiator, respectively. The polymerizations were carried out in a high pressure cell with lateral sapphire windows at 80°C. The effect of RAFT agent concentration, including the case without RAFT controller, on polymerization rate, molecular weight development, gel fraction, swelling index, and particle morphology was analysed.


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