Iniferter photo

The C-S bond of the sulfide end groups can be relatively weak and susceptible to thermal and photo- or radical-induced homolysis. This means that certain disulfides [for example 7-9] may act as iniferters in living radical polymerization and they can be used as precursors to block copolymers (Sections 7.5.1 and 9.3.2). 

Disulfide derivatives and hexasubstituted ethanes may also be used in this context to make end-functional polymers and block copolymers. The use of dilhiuram disulfides as thermal initiators was explored by Clouet, Nair and coworkers. Chain ends are formed by primary radical termination and by transfer to the dilhiuram disulfide. The chain ends formed are thermally stable under normal polymerization conditions. I he use of similar compounds as photo-iniferters, when some living characteristics may be achieved, is described in Section 9.3.2.1.1. 

Iniferters. The peculiar behavior of thim-am disulfides in free radical polymerization was first identified by Tobolsky (63,64). These molecules can act simultaneously as an iraitiator, chain transfer agent, and terminator in a polymerization reaction and generally referred as iniferters by anomy to their role (65,66). Photo-chemically and thermally activated iniferter characteristics of thiuram disulfides... 

I.K. Kwon, T. Matsuda, Photo-iniferter-based thermoresponsive block copolymers composed of poly(ethylene glycol) and poly(N-isopropylacrylamide) and chondrocyte immobilization, Biomaterials, 27, 986-95, 2006. 

LUO 02b] Luo N.,Hutchison J.B., Anseth K.S. et al, Synthesis of a novel methaciylic monomer iniferter and its application in surface photo grafting on cross linked polymer substrates , Journal of Polymer Science Part A Polymer Chemistry, vol. 40, pp. 1885-1891, 2002. 

LUO 03] Luo N., Metiers A.T., Hutchison J.B. et al, A Methaciylated Photo iniferter as a Chemical Basis for Microlithography Micro patterning Based on Photo grafting Polymerization , Macromolecules, vol. 36, pp. 6739-6745, 2003. 

He, D., Ulbricht, M., Tailored "Grafting-From" Functionalization of Microfiltration Membrane Surface Photo-Initiated by Immobilized Iniferter, Macromol. Chem. Phus. 2009,210,1149-1158. 

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