Charlot, V. published the artcileInfluence of the photoinitiating system on the properties of photopolymerized methylmethacrylate: the role of the ketyl radical in type II photoinitiators, Recommanded Product: Ethyl 4-dimethylaminobenzoate, the publication is Polymer Chemistry (2021), 12(9), 1210-1216, database is CAplus.
Three photoinitiating systems (PIS) exhibiting different photoinitiation mechanisms were used for radical photopolymerization of methylmethacrylate (MMA). Namely, a photoactive RAFT agent (N,N benzyl dimethyldithiocarbamate), a type II photoinitiating system (isopropylthioxanthone/amine) and a photocyclic initiating system (isopropylthioxanthone/amine/triazine) were compared. It is found that the type II photoinitiating system leads to relatively low Mn and D̅ values, a fact partly attributed to the ketyl radical that acts as a terminating agent. When adding a triazine derivative to this system, the PIS turns to be highly efficient. High Mn values were found and the D̅ values dramatically increased. This behavior is attributed to the disappearance of the ketyl radical by virtue of a photocycle. By contrast, the use of a photoactive RAFT agent leads to both high Mn and low D̅. These differences affect the Tg values, a fact which is highlighted when comparing the behavior of the RAFT agent with that of the photocyclic initiating system. The decrease of D̅ leads to higher Tg by avoiding the self-plasticization due to short chains.
Polymer Chemistry published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Recommanded Product: Ethyl 4-dimethylaminobenzoate.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics