Title of article :
Scale-up synthesis of vinyl polymer-grafted nano-sized silica by radical polymerization of vinyl monomers initiated by surface initiating groups in the solvent-free dry-system
Author/Authors :
Jun Ueda، نويسنده , , Shimpei Sato، نويسنده , , Asako Tsunokawa، نويسنده , , Takeshi Yamauchi، نويسنده , , Norio Tsubokawa، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
8
From page :
193
To page :
200
Abstract :
For the purpose of the prevention of the environmental pollution and the simplification of reaction process, the scale-up radical graft polymerization of vinyl monomers onto nano-sized silica surface initiated by azo groups and peroxycarbonate groups previously introduced onto the surface in the solvent-free dry-system was investigated. The introduction of azo groups onto the silica surface was achieved by the reaction of surface amino groups with 4,4′-azobis(4-cyanopentanoic acid chloride). On the other hand, the introduction of peroxycarbonate groups onto the silica surface was achieved by Michael addition of surface amino groups to t-butylperoxy-2-methacryloyloxyethylcarbonate. The graft polymerization of vinyl monomers onto the surface was successfully achieved by splaying monomers to nano-sized silica having azo and peroxycarbonate groups in solvent-free dry-system. It is interesting to note that the formation of ungrafted polymer was depressed in comparison with graft polymerization in solution: the grafting efficiency was 90–95%. In addition, in the solvent-free dry-system, the grafting of copolymer having pendant peroxycarbonate groups onto the nano-sized silica surface and the radical postgraft polymerization of styrene initiated by the pendant initiating groups of the grafted copolymer chain on the silica surface was investigated.
Keywords :
Scale-up synthesis , Solvent-free dry-system , t-Butylperoxy-2-methacryloyloxyethylcarbonate , Nano-sized silica , Surface grafting
Journal title :
European Polymer Journal(EPJ)
Serial Year :
2005
Journal title :
European Polymer Journal(EPJ)
Record number :
1212575
Link To Document :
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