Details

Autor(en) / Beteiligte

• BICAK, N
• SENKAL, B. F
• SISMANOGLU, T
• ÖZEROGLU, C

Titel

New, strong cationic hydrogels: Preparation of N,N,N′,N′-tetraallyl piperazinium dibromide and its copolymers with N,N-diallyl morpholinium bromide

Ist Teil von

• Journal of polymer science. Part A, Polymer chemistry, 2000-03, Vol.38 (6), p.1006-1013

Ort / Verlag

New York: John Wiley & Sons, Inc

Erscheinungsjahr

2000

Link zum Volltext

Quelle

Wiley Online Library

Beschreibungen/Notizen

• N,N,N′,N′‐tetraallyl piperazinium dibromide (TAP) has been prepared in high yields by quaternization of N,N′‐diallyl piperazine with allyl bromide. Herein, we have described preparation of nonhydrolysable, strong, cationic hydrogels by copolymerization of TAP with N,N‐diallyl morpholinium bromide (DAM) in the presence of t‐butyl hydroperoxide as initiator in aqueous solutions. Because the monomer and crosslinker involved consist of quaternary amine functions, these hydrogels are fully cationic and do not carry hydrolysable groups. Contrary to expectations, the quaternary amine hydrogels presented do not show any super absorbency, instead dry gel particles in water undergo spontaneous disintegration with an audible bursting of the particles due to instantaneous, high osmotic pressure. Whereas, in KBr or HBr solutions, the swellings are relatively slow. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 1006–1013, 2000 Nonhydrolysable, strong, cationic hydrogels have been prepared by copolymerization of TAP (N,N,N′,N′‐tetraallyl piperazinium dibromide) with DAM (N,N‐diallyl morpholinium bromide) in the presence of t‐butyl hydroperoxide as initiator in concentrated aqueous solutions. The resulting hydrogels do not show superabsorbency and disintegrate spontaneously to give small particles upon standing in water.