What is type1 photoinitiator?
Norish type I initiators are typically compounds containing benzoyl groups which undergo cleavage when exposed to UV light to generate two free radicals of which at least one reacts with monomers to initiate polymerization.
What is the function of photoinitiator?
Photoinitiators are molecules that absorb photons upon irradiation with light and form reactive species out of the excited state, which initiate consecutive reactions. The initiating species may be radicals, cations, or anions.
How are photoinitiators made?
The photoinitiators are converted by light exposure to radicals, which initiate a spontaneous polymerization at room temperature.
Is AIBN photoinitiator?
As described above, AIBN is both thermal initiator and photoinitiator. The free radicals I• are slowly and continuously generated by conventional radical initiators AIBN in the presence of light during the polymerization.
Is benzoyl peroxide a photoinitiator?
Benzoyl peroxide, much like azobisisobutyronitrile, is a white powder used as a photoinitiator in various commercial and industrial processes, including plastics production. Unlike AIBN, however, benzoyl peroxide produces oxygen gas upon decomposing, giving this compound a host of medical uses as well.
What is irgacure?
Irgacure 2959 is a highly efficient non-yellowing radical photoinitiator for the UV curing of systems, such as hydrogels and bioinks. Irgacure is most efficiently activated using 365nm wavelength UV light. Irgacure must be solubilized in methanol, as it is not water soluble (such as LAP and Ruthenium).
What is the difference between oligomer and Multimer?
The units of an oligomer may be connected by covalent bonds, which may result from bond rearrangement or condensation reactions, or by weaker forces such as hydrogen bonds. The term multimer (/ˈmʌltɪmər/) is used in biochemistry for oligomers of proteins that are not covalently bound.
What is I2959?
Irgacure 2959 (I2959) is widely used as a photoinitiator for photochemical crosslinking of hydrogels. However, the free radicals generated from I2959 have been reported to be highly cytotoxic.
