ISSN:
1435-1536
Keywords:
Interfacial copolymers
;
coil-to-globule transitions
;
hydrophobically modified poly(acrylamides)
;
poly(N-isopropylacrylamide)
;
n-clusters
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Experimental studies of the coil-to-globule transitions exhibited in better than θ-solvents by interfacial copolymers ofN-isopropylacrylamide and acrylamide imply that a lower bound for the value of ‘n’ in then-clusters of poly(N-isopropylacrylamide) (PNIPAM) is 3. The corresponding upper bound is therefore likely to be 5 or 6. Statistical copolymers of PNIPAM containing upwards of 0.75 mole fraction of acrylamide (whose homopolymer does not itself displayn-clustering) exhibited this transition, which disappeared at higher mole fractions of acrylamide. Interfacial homopolymers ofN-ethylacrylamide and its statistical copolymers withN-isopropylacrylamide exhibitedn-clustering at all compositions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00653058
