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Investigation of the Interpolymer Complex between Hydroxypropyl Cellulose and Maleic Acid‐Styrene Copolymer, 1
Author(s) -
Bumbu GinaGabriela,
Vasile Cornelia,
Eckelt John,
Wolf Bernhard A.
Publication year - 2004
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200400253
Subject(s) - maleic acid , copolymer , hydroxypropyl cellulose , turbidimetry , aqueous solution , mole fraction , polymer chemistry , viscometer , polymer , comonomer , styrene , chemistry , enthalpy , entropy of mixing , chemical engineering , materials science , organic chemistry , viscosity , chromatography , thermodynamics , physics , engineering , composite material
Summary: The hydrogen bonding‐interpolymer association of hydroxypropyl cellulose (HPC) with maleic acid‐styrene (MAc‐S) copolymer has been investigated in dilute aqueous solution by viscometry, turbidimetry and potentiometry. At a mixing ratio between MAc‐S and HPC of 10:90, the solution exhibits a phase separation upon heating, while for other mixing ratio no phase separation could be detected. The stability of the interpolymer complex (IPC) increases as the temperature rises. The stoichiometry of the IPC, in mole units, was estimated as being MAc‐S:HPC = 5:2. The thermodynamic functions (enthalpy and entropy) of the complexation process have been determined.Dependence of IPC concentration in H 2 O/MAc‐S/HPC system on the mole fraction of MAc‐S in polymer mixture at different temperatures.