NiyaziBıçak,BahireFilizŞenkal,Tuba Şişmanoğlu and CemalÖzeroğlu "New Strong Cationic Hydrogel:Preparation of N,N,N’,N’-Tetraallyl Piperazinium Dibromide and Its Copolymers With N,N-Diallyl Morpholinium Bromide”,