Next Article in Journal
Dynamical Scheduling and Robust Control in Uncertain Environments with Petri Nets for DESs
Next Article in Special Issue
Organic Polymers as Porogenic Structure Matrices for Mesoporous Alumina and Magnesia
Previous Article in Journal
Modeling Microbial Communities: A Call for Collaboration between Experimentalists and Theorists
Previous Article in Special Issue
Synthesis of Water-Soluble Group 4 Metallocene and Organotin Polyethers and Their Ability to Inhibit Cancer
Open AccessArticle

Radical Copolymerization Kinetics of Bio-Renewable Butyrolactone Monomer in Aqueous Solution

Department of Chemical Engineering, Queen’s University, 19 Division St, Kingston, ON K7L3N6, Canada
Author to whom correspondence should be addressed.
Processes 2017, 5(4), 55;
Received: 6 September 2017 / Revised: 25 September 2017 / Accepted: 27 September 2017 / Published: 1 October 2017
(This article belongs to the Special Issue Water Soluble Polymers)
The radical copolymerization kinetics of acrylamide (AM) and the water-soluble monomer sodium 4-hydroxy-4-methyl-2-methylene butanoate (SHMeMB), formed by saponification of the bio-sourced monomer γ-methyl-α-methylene-γ-butyrolactone (MeMBL), are investigated to explain the previously reported slow rates of reaction during synthesis of superabsorbent hydrogels. Limiting conversions were observed to decrease with increased temperature during SHMeMB homopolymerization, suggesting that polymerization rate is limited by depropagation. Comonomer composition drift also increased with temperature, with more AM incorporated into the copolymer due to SHMeMB depropagation. Using previous estimates for the SHMeMB propagation rate coefficient, the conversion profiles were used to estimate rate coefficients for depropagation and termination (kt). The estimate for kt,SHMeMB was found to be of the same order of magnitude as that recently reported for sodium methacrylate, with the averaged copolymerization termination rate coefficient dominated by the presence of SHMeMB in the system. In addition, it was found that depropagation still controlled the SHMeMB polymerization rate at elevated temperatures in the presence of added salt. View Full-Text
Keywords: bio-renewable; depropagation; ionic strength; parameter estimation bio-renewable; depropagation; ionic strength; parameter estimation
Show Figures

Graphical abstract

MDPI and ACS Style

Luk, S.B.; Hutchinson, R.A. Radical Copolymerization Kinetics of Bio-Renewable Butyrolactone Monomer in Aqueous Solution. Processes 2017, 5, 55.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop