Water-soluble copolymers of acrylamide with diacetone -: acrylamide and N-t-butylacrylamide on aqueous montmorillonite surface:: synthesis and characterisation

The copolymerisation of acrylamide (AM) with N-(1,1-dimethyl-3-oxybulyl)acrylamide (DAAM) and N-t-butylacrylamide (hit-BAM) by Fe-III-thiourea redox initiator has been studied by loading the Fe-III ions in the interlayer spaces of montmorillonite prior to the polymerisation reaction, The values of r(1)r(2) have been determined as 0.43 for the AM:DAAM monomer pair and 0.70 for the AM:N-t-BAM pair, The intrinsic viscosities of the copolymers were found to decrease with an increase in the feed composition of DAAM or N-t-BAM. The microstructure of copolymers including mean sequence length distribution is predicted for a range of feed compositions through the knowledge of reactivity ratios, (C) 1999 Elsevier Science Ltd. All rights reserved.