Vinyl benzoxazine: a novel heterobifunctional monomer that can undergo both free radical polymerization and cationic ring-opening polymerization

RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102441-102447 ◽  
Author(s):  
He-Ming Ma ◽  
Yun Liu ◽  
Ying-Xuan Liu ◽  
Jin-Jun Qiu ◽  
Cheng-Mei Liu
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Ring Opening ◽  
Free Radical Polymerization ◽  
Ring Opening Polymerization ◽  
Vinyl Group ◽  
Cationic Ring Opening Polymerization

A novel heterobifunctional monomer (6-ethenyl-3-phenyl-3,4-dihydro-2H-1,3-benzoxazine (VBOZO)) containing both a vinyl group and benzoxazine group was successfully prepared and the homo- and copolymerization reactions of this monomer were studied.

Free-Radical Polymerization and Ring-Expansion of a Cubane Acrylate: a Unique Low-Shrink Polymer

2009 ◽  
Vol 62 (2) ◽  
pp. 145 ◽  
Author(s):  
Alison E. McGonagle ◽  
G. Paul Savage
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Ring Opening ◽  
Free Radical Polymerization ◽  
Ring Expansion ◽  
Side Chain ◽  
Molecular Volume ◽  
Acrylate Polymer

A pendant cubane substituent has been incorporated into an acrylate polymer side chain to give poly[methyl 4-(acryloyloxymethyl)cubane carboxylate]. Treating this polymer with a rhodium(i) salt triggers a catalytic, ring-opening rearrangement of the cubane substructure to cyclooctatetraene, with a concomitant expansion in molecular volume. This system offers a unique opportunity to reverse the shrinkage associated with polymerization.

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