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  • entropy  (1)
  • poly(N-isopropylacrylamide)  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Coil-to-globule transitions of interfacial copolymers in better than theta-solvents (1996)
    Springer
    Colloid & polymer science 274 (1996), S. 622-627 
    Details
    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
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The effects of particle configurational entropy on the flocculation of sterically stabilized dispersions (1981)
    Springer
    Colloid & polymer science 259 (1981), S. 1027-1030 
    Details
    ISSN: 1435-1536
    Keywords: Steric configurational ; entropy ; flocculation ; dispersions
    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: Summary Theories are developed that predict the magnitude of the effects of particle configurational entropy on the flocculation behaviour of sterically stabilized dispersions. The free energy associated with the loss of configurational entropy on flocculation is relatively small (less than 10kT for the usual volume fractions studied) but may be responsible for the small dependence of the critical flocculation point on volume fraction of latex reported in some, but not all, experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01558617
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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