SOLUTION BEHAVIOR OF A RANDOM COPOLYMER OF POLY(ISOBUTYL METHACRYLATE (TERT-BUTYLAMINO)ETHYL METHACRYLATE) .1. LASER-LIGHT SCATTERING STUDIES

Laser light scattering studies of solution behavior of a random copolymer of poly(isobutyl methacrylate-co-(tert-butylamino)ethyl methacrylate) in isopropylamine, N,N,N’,N’-tetramethylethylenediamine (TMEDA), N,N-dimethylformamide, N,N-dimethylacetamide, and a 0.4/0.6 (molar ratio) mixture of TMEDA and 3-heptanone are described. By taking advantage of the isorefractive property of poly(isobutyl methacrylate) [poly(iBMA)], poly((tert-butylamino)ethyl methacrylate) [poly(tBAEMA)], and poly(iBMA-tBAEMA), the light scattering intensity properties for the copolymer poly(iBMA-tBAEMA) could be approximated as those of a homopolymer. Therefore, a distinguishing characteristic of the copolymer as a polymer additive that can influence the rheology of a large variety of fluids can be attributed to polymer aggregation by intra- and intermolecular interactions. © 1990, American Chemical Society. All rights reserved.