PolymerizationOf N-Substituted 4-Aminostyrene. PartV: Spontaneous PolymerizationOfN- AlkylAndN-Benzyl 4-Aminostyrene Salts InAcidicMediumAuthor(s): Yassin Abdallah Gabr
The spontaneous polymerization of N-methyl and N-benzyl 4-aminostyrene hydrochloride (NM4ASïHCl and NB4ASïHCl) at different pH values has been studied. Results indicate that the pH of the medium plays important role for the spontaneous polymerization of NM4ASïHCl and NB4ASïHCl. Four directions yielding polymeric products of differing compositions depending on the acidity of the medium were found. The differing polymeric structures formed through zwitterion and hydrogen-transfer polymerization. Poly(Nmethyl/ benzyl 4-aminostyrene)(PNM4AS and PNB4AS) has a zwitterionic chain mechanism at pH range 0.1-0.5 while the poly (N-methyl/benzyl 1,4- diethylaniline) (ionene) formed via a stepwise zwitterionic chain mechanism at pH 5.27.