Synthesis of new macro-azo-initiators having two kinds of azo linkages in repeating unit and block copolymerization by two-step radical polymerization initiated with them

1997 ◽  
Vol 35 (1) ◽  
pp. 69-76 ◽  
Author(s):  
Hisato Takahashi ◽  
Akira Ueda ◽  
Susumu Nagai
Keyword(s):  
Radical Polymerization ◽  
Block Copolymerization ◽  
Azo Initiators

Synthesis and Self-Assemble Behavior of Block Copolymerization of Vinyl Acetate and N-Vinylacetamide

2013 ◽  
Vol 645 ◽  
pp. 10-14
Author(s):  
Yu Lou ◽  
Dong Jian Shi ◽  
Wei Fu Dong ◽  
Ming Qing Chen
Keyword(s):  
Block Copolymer ◽  
Radical Polymerization ◽  
Vinyl Acetate ◽  
Microphase Separation ◽  
Molar Ratio ◽  
Block Copolymerization ◽  
Bulk State ◽  
Self Assembled

Polymerizations of VAc was carried out using AIBN as the initiator and DIP as the MADIX agent precursor. Then, block copolymer PVAc-b-PNVA had been synthesized by RAFT radical polymerization in the presence of PVAc-DIP as macro CTA. The length of blocks could be tuned by changing the molar ratio of NVA and VAc. Block copolymer PVAc-b-PNVA self-assembled into micelles in solution, and underwent microphase separation in bulk state.

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