Acceleration effect of <i>N</i>
-allyl group on thermally induced ring-opening polymerization of 1,3-benzoxazine
作者:Hiroaki Oie、Atsushi Sudo、Takeshi Endo
DOI:10.1002/pola.24338
日期:2010.12.1
Thermallyinduced ring‐opening polymerization of monofunctional N‐allyl‐1,3‐benzoxazine 1a was compared with that of N‐(n‐propyl)‐1,3‐benzoxazine 1b to clarify an unexpected effect of allyl group to promote the polymerization, that is, in spite of the comparable bulkiness of allyl group to n‐propyl group, the polymerization of 1a was much faster than that of 1b. Such a difference in polymerization
Synthesis of polybenzoxazine precursors using thiols: Simultaneous thiol-ene and ring-opening reactions
作者:Zeynep Beyazkilic、Muhammet U. Kahveci、Binnur Aydogan、Baris Kiskan、Yusuf Yagci
DOI:10.1002/pola.26202
日期:2012.10.1
A new class of polybenzoxazineprecursors of combined molecular structure of benzoxazine in the open and ring form has been developed. Thermally curable benzoxazine networks were obtained by simultaneous photoinduced thiol‐ene and Catalytic Opening of the Lateral Benzoxazine Rings by Thiols (COLBERT). The thiol‐ene reactions were initiated by photolysis of a free radical photoinitiator, 2, 2‐dimethoxy‐2‐phenyl
Polybenzoxazine: A Powerful Tool for Removal of Mercury Salts from Water
作者:Omer S. Taskin、Baris Kiskan、Abdullah Aksu、Nuray Balkis、Jens Weber、Yusuf Yagci
DOI:10.1002/chem.201403200
日期:2014.8.25
A reusable macroporous polybenzoxazine resin with high specific surface area was prepared as sorbent material for the removal of mercurysalts. For this purpose, allyl‐functionalized bis‐benzoxazine was cured in dimethyl sulfoxide by thermally activated ring‐opening polymerization at 180 °C for 3 d followed by a freeze‐drying process. The porous structure of the resin was confirmed by SEM analysis
The present invention relates to expandable, polymerizable compositions comprising at least one benzoxazine and at least one cyclic carbonate, to polymerization products of these expandable, polymerizable compositions, to a process for preparing these polymerization products as well as to uses of these expandable, polymerizable compositions. The present invention is based on the surprising finding that copolymerizing benzoxazine monomers with cyclic carbonate monomers results in novel copolymers having unforeseeably high expansion rates, wherein the properties (e.g. solid/brittle, solid/soft, rubbery) of the resulting copolymers can be easily and reproducibly tuned/adjusted, depending on the ratio of the benzoxazine equivalents/cyclic carbonate equivalents present in the composition and copolymer, respectively.