Thermoresponsive Property of Poly( N , N -bis(2-methoxyethyl)acrylamide) and Its Copolymers with Water-Soluble Poly( N , N -disubstituted acrylamide) Prepared Using Hydrosilylation-Promoted Group Transfer Polymerization.

The group-transfer polymerization (GTP) of N , N -bis(2-methoxyethyl)acrylamide (MOEAm) initiated by Me 2 EtSiH in the hydrosilylation-promoted method and by silylketene acetal (SKA) in the conventional method proceeded in a controlled/living manner to provide poly( N , N -bis(2-methoxyethyl)acrylamide) (PMOEAm) and PMOEAm with the SKA residue at the α-chain end (MCIP-PMOEAm), respectively. PMOEAm- b -poly( N,N- dimethylacrylamide) (PDMAm) and PMOEAm- s -PDMAm and PMOEAm- b -poly( N,N -bis(2-ethoxyethyl)acrylamide) (PEOEAm) and PMOEAm- s -PEOEAm were synthesized by the block and random group-transfer copolymerization of MOEAm and N,N- dimethylacrylamide or N,N -bis(2-ethoxyethyl)acrylamide. The homo- and copolymer structures affected the thermoresponsive properties; the cloud point temperature ( T cp ) increasing by decreasing the degree of polymerization (x). The chain-end group in PMOEAm affected the T cp with PMOEAm x > MCIP-PMOEAm x . The T cp of statistical copolymers was higher than that of block copolymers, with PMOEAm x - s -PDMAm y > PMOEAm x - b -PDMAm y and PMOEAm x - s -PEOEAm y > PMOEAm x - b -PEOEAm y .