212132-38-2Relevant academic research and scientific papers
Effects of dendron generation and salt concentration on phase structures of dendritic-linear block copolymers with a semirigid dendron containing PEG tails
Cai, Huanhuan,Jiang, Guoliang,Shen, Zhihao,Fan, Xinghe
experimental part, p. 6176 - 6184 (2012/10/18)
We prepared a series of dendritic-linear block copolymers (DLBCPs) bearing a semirigid Percec-type dendron with ionophilic poly(ethylene glycol) (PEG) tails and a polystyrene (PS) linear polymer by nitroxide-mediated living radical polymerization (NMRP).
Multi-armed, TEMPO-functionalized unimolecular initiators for starburst dendrimer synthesis via stable free radical polymerisation. 2. Tris (1,3,5)benzyloxy unimers
Ghani, Mohmad Asri Abd,Abdallah, Dalia,Kazmaier, Peter M.,Keoshkerian, Barkev,Buncel, Erwin
, p. 1403 - 1412 (2007/10/03)
The synthesis of the trifunctionalized TEMPO-modified unimolecular initiators, unimers I, II, and III is described. Unimer I was prepared via an SN2 type Williamson ether coupling of 1,3,5-tris(iodomethyl)benzene with a TEMPO-containing ethylbenzene hydroxy derivative. The synthesis of unimer II, however, was accomplished through SN1 reaction of 1,3,5-tris(bromomethyl)benzene with the hydroxy-ethylbenzene TEMPO derivative in the presence of silver triflate. Synthesis of unimer III started from phloroglucinol and an SNAr reaction with 1-fluoro-4-nitrobenzene, followed by reduction to the amino compound and Schiff base formation with the TEMPO-derivatized aromatic aldehyde. Stable free radical polymerisation (SFRP) of styrene and acetoxystyrene with unimer I are also described with molecular weights and polydispersities reported. It is concluded that the SFRP of styrene with a triradical initiator meets the requirements of a living system.
