A viscometric study of dilute aqueous solutions of poly(vinylalcohol)-polyacrylamide mixtures

Staszewska, D.; Bohdanecký, M.

doi:10.1016/0014-3057(81)90161-0

Cited by 31 publications

(20 citation statements)

References 14 publications

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“…[31,32] The ideal viscosity of a polymer mixture represents the viscosity of the system in the absence of specific interactions between the two components. In the case of a solution of a mixture of two neutral polymers, the ideal values of the viscosity of the mixtures are calculated as the weight average of the viscosity values of the two components.…”

Section: Viscometrymentioning

confidence: 99%

Investigation of the Interpolymer Complex between Hydroxypropyl Cellulose and Maleic Acid‐Styrene Copolymer, 1

Bumbu

Vasile²,

Eckelt

et al. 2004

Macro Chemistry & Physics

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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.

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Section: Viscometrymentioning

confidence: 99%

Investigation of the Interpolymer Complex between Hydroxypropyl Cellulose and Maleic Acid‐Styrene Copolymer, 1

Bumbu

Vasile²,

Eckelt

et al. 2004

Macro Chemistry & Physics

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“…A positive deviation is demonstrated at the lower weight fraction region of PVB (W PVB Ͻ 0.4), which reflects the expanding of both coil dimensions of CA and PVB because of strong intermolecular interaction or compatibility between them; negative deviation is displayed at the higher weight fraction region of PVB (W PVB Ͼ 0.4), which means the shrinking of both coil dimensions of CA and PVB that is due to incompatibility between them. [21][22][23][24][25][26][27][28] In other words, low [] values of the blends are connected with a low degree of overlapping of unlike polymer molecules, indicating that repulsive interactions between the two polymers prevail over attractive interactions. The increase of the repulsive interaction between CA and PVB chains in their blends with high W PVB is probably due to the decreasing of hydroxy and the increasing of side butyl with the increasing W PVB in the blends.…”

Section: Viscometrymentioning

confidence: 99%

Effect of compatibility of cellulose acetate/poly(vinyl butyral) blends on pervaporation behavior of their membranes for methanol/methyl tert‐butyl ether mixture

Qian

Chen

Zhang

et al. 2002

J of Applied Polymer Sci

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Binary blends and their blend membranes of cellulose acetate (CA) and poly(vinyl butyral) (PVB) are prepared by solution blending. The compatibility of the blends is studied by viscometry and Fourier transform IR. It is found that the incompatibility of the blends is markedly manifested when the weight fraction of PVB in the CA/PVB blends (W PVB ) is located at higher regions. On the other hand, compatibility is obtained for the CA/PVB blends with lower W PVB values, especially at about 0.2. This compatibility is believed to play a key role in the good pervaporation behavior of CA/PVB blend membranes.

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“…[33,34] The ideal viscosity of a polymer mixture represents the viscosity of the system in the absence of specific interactions between the two components. When one of the partners is a charged polymer like a weak polyacid, in order to minimize the influence of polyelectrolyte behavior due to dilution on the specific or reduced viscosity of the polymer mixture, the viscometric measurements are performed at a constant polyacid concentration.…”

Section: Viscometrymentioning

confidence: 99%

Interpolymer Complexes between Hydroxypropylcellulose and Copolymers of Maleic Acid: A Comparative Study

Bumbu

Vasile²,

Chiţanu³

et al. 2005

Macro Chemistry & Physics

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Summary: The formation of interpolymer complexes (IPCs) between hydroxypropylcellulose (HPC) and copolymers of maleic acid with vinyl acetate (MAc‐VA), acrylic acid (MAc‐AA) and styrene (MAc‐S) in aqueous solution has been investigated by turbidimetry, viscometry and fluorescence measurements. The viscosity data indicated a compact structure for the IPCs between HPC and maleic acid copolymers. Besides H‐bonding, strong hydrophobic forces materialize between HPC and MAc‐S, strengthening this IPC. The strength of the interpolymer interactions was estimated to increase in the order: HPC:MAc‐VA < HPC:MAc‐AA < HPC:MAc‐S. The IPCs of HPC with MAc‐VA or MAc‐AA were water‐soluble at pH values higher than 3, while the IPC between HPC and MAc‐S was water‐soluble at pH values above 4.5.Cloud point temperature of different interpolymer complexes as a function of copolymer concentration.magnified imageCloud point temperature of different interpolymer complexes as a function of copolymer concentration.

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A viscometric study of dilute aqueous solutions of poly(vinylalcohol)-polyacrylamide mixtures

Cited by 31 publications

References 14 publications

Investigation of the Interpolymer Complex between Hydroxypropyl Cellulose and Maleic Acid‐Styrene Copolymer, 1

Investigation of the Interpolymer Complex between Hydroxypropyl Cellulose and Maleic Acid‐Styrene Copolymer, 1

Effect of compatibility of cellulose acetate/poly(vinyl butyral) blends on pervaporation behavior of their membranes for methanol/methyl tert‐butyl ether mixture

Interpolymer Complexes between Hydroxypropylcellulose and Copolymers of Maleic Acid: A Comparative Study

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