The preparation and characterization of cellulose-based chain transfer agent (CTA) and their use to mediate the reversible addition-fragmentation chain transfer (RAFT) polymerization of ethyl acrylate (EA) and N-isopropylacrylamide (NIPAAm) was investigated. One equivalent of hydroxyisopropyl cellulose (HPC) along with 14 equiv of a carboxylic acid-functionalized RAFT agent [propionic acidyl butyl trithiocarbonate (PABTC)] was dissolved in chloroform and the reaction was carried out in presence of seven equivalents of N,N-dimethyl-4-aminopyridine (DMAP) and N,N-dicyclohexylcarbodiimide (DCC) at 40 °C. The differential scanning calorimetry (DSC) analysis showed three glass transition temperatures (Tg) around 45, 55, and 135 °C and a melting temperature (TM) at 157 °C. The polydispersity index (PDI) of the poly(N-isopropylacrylamide) (PNIPAAm)-grafted HPC was high (PDI = 3.4) since the macro-CTA used was polydisperse.
|Number of pages||5|
|Journal||Journal of Polymer Science, Part A: Polymer Chemistry|
|Publication status||Published - 1 Oct 2010|
- Ethyl acrylate