Abstract
| Language | English |
|---|---|
| Pages | 65-79 |
| Number of pages | 14 |
| Journal | Reactive and Functional Polymers |
| Volume | 66 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2006 |
Fingerprint
Keywords
- Conventional free-radical polymerisation
- Branched architecture
- Water soluble copolymers
- Poly(dimethylacrylamide)
Cite this
}
Facile synthesis of branched water-soluble poly(dimethylacrylamide)s in conventional and parallel reactors using free radical polymerisation. / Isaure, Françoise; Cormack, Peter A.G.; Sherrington, D.C.
In: Reactive and Functional Polymers, Vol. 66, No. 1, 01.2006, p. 65-79.Research output: Contribution to journal › Article
TY - JOUR
T1 - Facile synthesis of branched water-soluble poly(dimethylacrylamide)s in conventional and parallel reactors using free radical polymerisation
AU - Isaure, Françoise
AU - Cormack, Peter A.G.
AU - Sherrington, D.C.
PY - 2006/1
Y1 - 2006/1
N2 - Water-soluble, branched dimethylacrylamide copolymers have been prepared via facile, one-step, batch solution free-radical polymerisations taken to high conversion. N,N-dimethylacrylamide has been copolymerised with different branching agents (ethylene glycol dimethacrylate, EGDMA and PEG dimethacrylates) using dodecanethiol (DDT) as a chain transfer agent to inhibit gelation. Good yields of soluble branched copolymers have been produced by carrying out individual reactions in conventional glass round-bottomed flasks and also parallel reactions in a Radley's Carousel Reactor. The products have been characterised by size exclusion chromatography and 1H NMR and FT-IR spectroscopies and interestingly though the trends in copolymer structure are similar for products prepared in the conventional glassware and those in the parallel reactor, some systematic differences arise between the two sets of products. This seems to be due in part to the slightly different scale of these reactions, and possibly also to the better sealing of the parallel reactor tubes and hence better exclusion of traces of O2. Branching seems to occur more uniformly with DAM than with the previously studied methyl methacrylate (all other parameters being identical), though the effects of the chain transfer agent, monomer concentration, monomer/chain transfer agent feed ratio and the chain length of the branching agent are similar for both monomers. Also the EGDMA/DDT ratio is at least as important in controlling branching as the absolute amount of EGDMA and DDT incorporated. Highly branched products can therefore be made with relatively low levels of EGDMA and DDT as long as the EGDMA/DDT ratio is high enough, but not so high as to favour cross-linking.
AB - Water-soluble, branched dimethylacrylamide copolymers have been prepared via facile, one-step, batch solution free-radical polymerisations taken to high conversion. N,N-dimethylacrylamide has been copolymerised with different branching agents (ethylene glycol dimethacrylate, EGDMA and PEG dimethacrylates) using dodecanethiol (DDT) as a chain transfer agent to inhibit gelation. Good yields of soluble branched copolymers have been produced by carrying out individual reactions in conventional glass round-bottomed flasks and also parallel reactions in a Radley's Carousel Reactor. The products have been characterised by size exclusion chromatography and 1H NMR and FT-IR spectroscopies and interestingly though the trends in copolymer structure are similar for products prepared in the conventional glassware and those in the parallel reactor, some systematic differences arise between the two sets of products. This seems to be due in part to the slightly different scale of these reactions, and possibly also to the better sealing of the parallel reactor tubes and hence better exclusion of traces of O2. Branching seems to occur more uniformly with DAM than with the previously studied methyl methacrylate (all other parameters being identical), though the effects of the chain transfer agent, monomer concentration, monomer/chain transfer agent feed ratio and the chain length of the branching agent are similar for both monomers. Also the EGDMA/DDT ratio is at least as important in controlling branching as the absolute amount of EGDMA and DDT incorporated. Highly branched products can therefore be made with relatively low levels of EGDMA and DDT as long as the EGDMA/DDT ratio is high enough, but not so high as to favour cross-linking.
KW - Conventional free-radical polymerisation
KW - Branched architecture
KW - Water soluble copolymers
KW - Poly(dimethylacrylamide)
UR - http://dx.doi.org/10.1016/j.reactfunctpolym.2005.07.009
U2 - 10.1016/j.reactfunctpolym.2005.07.009
DO - 10.1016/j.reactfunctpolym.2005.07.009
M3 - Article
VL - 66
SP - 65
EP - 79
JO - Reactive and Functional Polymers
T2 - Reactive and Functional Polymers
JF - Reactive and Functional Polymers
SN - 1381-5148
IS - 1
ER -