Synthesis and MALDI-TOF-MS of PMA and PMA-PS-Block Copolymers
-
Can, Aydın; Altuntas, Esra; Hoogenboom, Richard; Schubert, Ulrich S.
- Abstract:
- The synthesis of well-defined block copolymers from styrene and methyl acrylate via ATRP
is discussed in this contribution. Kinetic studies on these block copolymerizations as well
as characterization studies were performed to investigate the monomer composition in the
respective PS and PMA blocks. MALDI-TOF-MS was performed to clarify the exact number
of repeating units of each block and the total number of units in the block copolymer. Block
copolymers up to 22 kDa could be analyzed by MALDI-TOF-MS, whereby polymers with
PMA as first block showed a large second distribution corresponding to PMA homopolymers.
However, SEC demonstrated that only a small amount of homopolymer was present
indicating that care needs to be taken with interpreting MALDI-TOF-MS data, which is a
qualitative rather than a quantitative technique.
- Year:
- 2010
- Type of Publication:
- Article
- Journal:
- European Polymer Journal
- Volume:
- 46
- Pages:
- 1932 - 1939