This proposal builds upon the successful study of a cationic copolymer capable of forming polymer micellar-like aggregates, simply by reducing pH (D33 at ILL 9-12-433 see report). Moreover, the size of aggregates could be tuned by adjusting pH during polymerisation. The copolymer system is comprised of a small mol. % (5-17) N, N-dimethylaminoethyl methacrylate (DMAEMA) copolymerised with methyl methacylate (MMA). This type of copolymer is significant for offering a simplified and direct route to cationic aggregates, as compared with common block copolymers. The proposal prompts a re-think of the general approach: can the careful design of random (surface-active) copolymers, offer similar control over aggregations, circumventing the need for harder to prepare block copolymers?