Removal of Residual Monomers from Polymer Suspensions
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Avlägsnande av Restmonomerer från Polymersuspensioner (Swedish)
One of the challenges with suspension polymerization is the removal of residual monomers. Environmental regulations and market preferences are the main driving forces behind the development of novel methods and improvement of current methods. In this work, the removal of monomers has been studied using two types of chemistries: post-polymerization with radical initiators, and aza-Michael addition. Two radical initiators with different degrees of hydrophobicity were used to polymerize residual monomers in polymer particle dispersions. Results show that both initiators succeeded in removing residual monomers, but the hydrophilic initiator is more efficient than the hydrophobic initiator. Two different substrates have been amine-functionalized and reacted with methyl acrylate (monomer) in water. The functionalized substrates were characterized using Kaiser test and UV/Vis spectroscopy. The heterogeneous nature of one of the substrates seems to affect the reproducibility of the analysis results. Data suggest that the amine-functionalized substrates react with methyl acrylate at 60 °C in water and full conversion may be achieved using stoichiometric ratios. However, the amount of results was limited and more experiments are needed.
Place, publisher, year, edition, pages
2015. , 37 p.
polymer suspension, residual monomer, radical polymerization, heterogeneous system, UV/Vis spectroscopy
IdentifiersURN: urn:nbn:se:kth:diva-180549OAI: oai:DiVA.org:kth-180549DiVA: diva2:895273