A study of pyridinium-type functional polymers. I. Preparation and characterization of soluble pyridinium-type functional polymers

✍ Scribed by Guangji Li; Jiarui Shen; Yinlan Zhu

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 734 KB
• Volume: 62
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19961226)62:13<2247::aid-app9>3.0.co;2-j

✦ Synopsis

SYNOPSJS

Copolymerization of 4-vinylpyridine (4VP) with styrene (St) was performed in ethanol using 2,2'-azobisisobutyronitrile (AIBN) as an initiator, and then a random copolymer P(4VP-St) was obtained. A soluble pyridinium-type polymer containing N-benzyl-4-vinylpyridinium bromide [Q-P(4VP-St)], was prepared by quaternization of P(4VP-St) with benzyl bromide (BzBr). The structures of P(4VP-St) and its quaternized product Q-P(4VP-St) were identified by FTIR. The 4VP content in P(4VP-St) and the pyridinium group content (C,) in Q-P(4VP-St) were determined by nonaqueous titration and argentometry, respectively. The molecular weight of p(4VP-St) was characterized by intrinsic viscosity. In addition, the charge density u of the soluble pyridinium-type polymers was measured by colloid titration, and the mathematical relation between u and C, was established as follows: u = -0.090 + 0.942 C,. A preliminary investigation was made into the viscosity behavior and electroconductivity of the Q-P(4VP-St)/polar solvent system.