SOLUTION BEHAVIOR OF HYDROPHOBICALLY-MODIFIED HYDROLYZED ALTERNATING COPOLYMERS OF MALEIC-ANHYDRIDE AND PROPENE

Hydrophobically modified polymers based on the alternating copolymer o f maleic anhydride and propene were prepared by a polymer analogous re action of the anhydride copolymer with amino-terminated polystyrenes. The aqueous solution behaviour of polymers with different degrees of g rafting was investigated by potentiometric and conductometric titratio ns, by viscometry and by H-1-NMR spectroscopy. The two apparent dissoc iation constants and the solution conductivity are lower than those of the non-grafted copolymer. This study indicates the formation of over -molecular structures. CMCs determined by viscometry are lower than th ose of simple tensides. The influence of the degree of grafting on the solution behaviour was studied additionally by 1H-NMR spectroscopy. ( C) 1998 Elsevier Science Ltd. All rights reserved.