A STUDY ON P(VP-VA) HYDROPHOBICALLY ASSOCIATING BEHAVIOUR OF WATER-SOLUBLE COPOLYMERS

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TAGHI ZADEH M.T.; FOROUTAN MASOUMEH

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Journal: Iranian Polymer Journal Year:2005 | Volume:14 | Issue:1 (55) Page(s): 47-54

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Title

A STUDY ON P(VP-VA) HYDROPHOBICALLY ASSOCIATING BEHAVIOUR OF WATER-SOLUBLE COPOLYMERS

Author(s)

TAGHI ZADEH M.T. | FOROUTAN MASOUMEH | Issue Writer Certificate

Keywords

HYDROPHOBICALLY ASSOCIATING POLYMER

VISCOSITY

REFRACTIVE INDEX

CRITICAL CONCENTRATION

VINYLPYRROLIDONE-VINYL ACETATE COPOLYMER

Abstract

Vinylpyrrolidone-vinyl acetate (VP-VA) hydrophobically associating water-soluble copolymers were synthesized by free radical copolymerization. The effects of hydrophobic content and temperature on the VISCOSITY and REFRACTIVE INDEX behaviour were investigated in detail. The CRITICAL CONCENTRATION C* of the hydrophobically associating water-soluble copolymers was studied in the static state and in flowing solution by refractometry and viscosimetry, respectively. A dramatic decrease in solution VISCOSITY of P(VP-VA) copolymers is observed with increasing the VA content at all temperatures. Also as the VA content in the copolymer increased, the solution REFRACTIVE INDEX of the copolymer decreased. The lowering in VISCOSITY and REFRACTIVE INDEX reflects the contraction of the polymer coil because of intramolecular hydrophobic interactions. Variation of the dynamic and static CRITICAL CONCENTRATION as a function of the temperature for P(VP-VA) copolymer in water has been investigated. The CRITICAL CONCENTRATIONs are lower when determined by REFRACTIVE INDEX measurements in the static state compared to the CRITICAL CONCENTRATIONs determined in the dynamic state using viscometer.

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APA: Copy

TAGHI ZADEH, M.T., & FOROUTAN, MASOUMEH. (2005). A STUDY ON P(VP-VA) HYDROPHOBICALLY ASSOCIATING BEHAVIOUR OF WATER-SOLUBLE COPOLYMERS . IRANIAN POLYMER JOURNAL (ENGLISH), 14(1 (55)), 47-54. SID. https://sid.ir/paper/528587/en

Vancouver: Copy

TAGHI ZADEH M.T., FOROUTAN MASOUMEH. A STUDY ON P(VP-VA) HYDROPHOBICALLY ASSOCIATING BEHAVIOUR OF WATER-SOLUBLE COPOLYMERS . IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2005;14(1 (55)):47-54. Available from: https://sid.ir/paper/528587/en

IEEE: Copy

M.T. TAGHI ZADEH, and MASOUMEH FOROUTAN, “A STUDY ON P(VP-VA) HYDROPHOBICALLY ASSOCIATING BEHAVIOUR OF WATER-SOLUBLE COPOLYMERS ,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 14, no. 1 (55), pp. 47–54, 2005, [Online]. Available: https://sid.ir/paper/528587/en

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