LIST OF USES
- List of uses
- Chain transfer agents
Chain transfer agents
In radical polymerization, which is a typical process for obtaining polymers, the process in which a growing radical reacts with other substances within the polymerization system, and in which transfer and re-initiation of radicals also occur, is called the chain transfer reaction. The total number of radicals in the entire polymerization system does not change in an ideal chain transfer. When a chain transfer agent is used, new radicals are generated by receiving radicals from the growing polymer chain within the radical polymerization system. As a result, the growth of the polymer stops, but other growth reactions start, and the system tends to deliver polymers with uniform molecular weight, even though the molecular weight remains rather small. Our company offers a wide variety of efficient and representative thiol-based chain transfer agents.
- Monomer emulsification synthesis
- Water-soluble polymer synthesis
We conducted a polymerization test on each chain transfer agent in emulsion polymerization using styrene, butyl acrylate, and methacrylic acid.。
NDM：N-dodecyl mercaptan / TDM：Tert-dodecyl mercaptan / OTG：Octylthioglycolate
Styrene/n-Buthylacrylate/Methacrylic acid ＝ 70/25/5
Potassium persulfate (KPS)
Chain transfer constants
The experimental value for the chain transfer constant Cs of the chain transfer agent performance is described below. Since the Cs value is obtained by dividing the chain transfer rate constant Kc by the growth reaction rate Kp (Cs = Kc/Kp), it varies depending on the type of monomer, etc.
MMA：Methyl methacrylate / NDM：N-dodecyl mercaptan / TDM：Tert-dodecyl mercaptan / OTG：Octylthioglycolate
The values shown above are typical values,not guranteed values.