Controlled radical polymerization of N-vinylpyrrolidone by reversible addition-fragmentation chain transfer process

Renjith Devasia, Raveendra L. Bindu, Redouane Borsali, Nathalie Mougin, Yves Gnanou*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

85 Scopus citations


Poly(N-vinylpyrrolidone) (PNVP) was polymerized by RAFT process using diphenyldithiocarbamate of diethylmalonate (DPCM) as the reversible chain transfer agent in the presence of a small percentage of a conventional radical initiator (AIBN). The molar mass of the polymers synthesized by this method was found to increase with conversion and time. The presence of end group in the polymer chain could be confirmed by 1H NMR spectra. The molar masses calculated using 1H NMR spectroscopy and static light scattering (SLS) showed good agreement with the theoretical molar masses. The RAFT compound was fully consumed during the initial stages of the polymerization itself. The controlled nature of these polymers was further confirmed by generating diblock copolymers by sequential addition of monomers such as styrene or n-butyl acrylate (n-BA). PNVP efficiently participated as a macro-RAFT reagent, and cross-over reaction between the two blocks efficiently occurred. The successful diblock copolymer synthesis using PNVP as macro-transfer reagent further confirms the "controlled" nature of such synthetic procedure.

Original languageEnglish (US)
Pages (from-to)8-17
Number of pages10
JournalMacromolecular Symposia
StatePublished - 2005
Externally publishedYes


  • Amphiphilic diblock copolymers
  • Controlled radical polymerization
  • Dithiocarbamate
  • N-vinylpyrrolidone
  • RAFT

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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