Formation of Graded Component in PVA/PAA Polymer Blend Aqueous Solutions under Electric Field

Abstract

Abstract: The formation of the gradient component in PVA/PAAblend aqueous solution under the electric field has been investigated. The polymer blend aqueous solution was prepared by dissolving PVA/PAA(70/30) in aqueous solution at room temperature. As a kind of polyelectrolytes, PAAcan ionize into PAA^n- and nH⁺ in the PVA/PAAblend aqueous solution. The PAA^n- anions should migrate to the anode under the electric field, accompanied with the PVAmoving to the cathode because of the concentration diffusion. The concentration of PAAalong the electric field was determined by measuring the local pHof the aqueous solution. The gradient component distribution was formed in the PVA/PAAblend along the electric field.

Key words: Electric field, PVA/PAA, Polymer blend, Gradient

CLC Number:

O631

TrendMD:

LI Zhi, KONG Xiang-Ming, XIE Xu-Ming . Formation of Graded Component in PVA/PAA Polymer Blend Aqueous Solutions under Electric Field[J]. Chem. J. Chinese Universities, 2001, 22(10): 1764.

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Formation of Graded Component in PVA/PAA Polymer Blend Aqueous Solutions under Electric Field

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