What is it about?
Free radical crosslinking polymerization is progressed by three steps - formation of trifunctional molecules, formation of infinite molecule, and reactions between radicals of infinite molecule or trapped molecules. Here, it was tried to clarify the polymerization process of acrylic acid at different pH levels, to investigate the effect of ionization and the concentration of a crosslinking agent on the crosslinking polymerization.
Featured Image
Why is it important?
Acrylic acid (AAc) is a very useful monomer due to the adhesive and pH sensitive properties. To apply this moiety to copolymerization or other types of incorporation, its crosslinking polymerization behavior must be understood. In this paper, we found three characteristics - (1) induction period depends on the ionization of AAc, (2) polymerization rate of AAc is independent of the concentration of a crosslinking agent, and (3) at low pH level, more homogeneous AAc hydrogel is formed.
Perspectives
Based on these results and conclusion, it will be achieved to incorporate comonomers which have thermo-sensitivity or other functionalities. It may be also possible to investigate crosslinking behavior in other types of crosslinking copolymerization, micellar polymerization, or polymerization of semi- (or latex-) interpenetrating polymer network.
Dr Byungsoo Kim
University of Southern California
Read the Original
This page is a summary of: Kinetics and crystallization in pH-sensitive free-radical crosslinking polymerization of acrylic acid, Journal of Applied Polymer Science, April 2015, Wiley,
DOI: 10.1002/app.42195.
You can read the full text:
Contributors
The following have contributed to this page
