ASSOCIATION OF ETHYLENE VINYL ACETATE COPOLYMER IN DILUTE SOLUTIONS IV. SOLVENT MIXTURE AND ADDITIVE EFFECT ON CA*

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ASSOCIATION OF ETHYLENE VINYL ACETATE COPOLYMER IN DILUTE SOLUTIONS IV. SOLVENT MIXTURE AND ADDITIVE EFFECT ON CA*

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- ASSOCIATION OF ETHYLENE VINYL ACETATE COPOLYMER IN DILUTE SOLUTIONS IV. SOLVENT MIXTURE AND ADDITIVE EFFECT ON CA*
- Vol. 17, Issue 4, Pages: 323-328(1999)
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- Published：20 August 1999
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ASSOCIATION OF ETHYLENE VINYL ACETATE COPOLYMER IN DILUTE SOLUTIONS IV. SOLVENT MIXTURE AND ADDITIVE EFFECT ON CA*[J]. 1999, 17(4): 323-328.
DOI：

ASSOCIATION OF ETHYLENE VINYL ACETATE COPOLYMER IN DILUTE SOLUTIONS IV. SOLVENT MIXTURE AND ADDITIVE EFFECT ON CA*[J]. 1999, 17(4): 323-328. DOI：

摘要

Critical association concentration (CA) of ethylene-vinyl acetate copolymer (EVA) in selectivesolvent mixtures of 1

2-dichloroethane (DCE) (polar solvent) and cyclohexane (CYH) (non-polar solvent)was investigated. DCE is a good solvent for polyvinyl acctate (PVAc) and a poor solvent for paraffin

whereas CYH is a good solvent for the paraffin and a precipitant for PVAc. Viscosities of EVA in differentcompositions of the solvent mixture with and without additives were measured. Viscosity results were used to detemine the CA value of the systems.It is shown that CA was markedly dependent on the composition of the solvent mixture and concentration and structure of additive.Solvation and competition between hydrogen bonding and micellisation were suggested for qualitative description of the changing of CA value observed.

Abstract

Critical association concentration (CA) of ethylene-vinyl acetate copolymer (EVA) in selectivesolvent mixtures of 1

2-dichloroethane (DCE) (polar solvent) and cyclohexane (CYH) (non-polar solvent)was investigated. DCE is a good solvent for polyvinyl acctate (PVAc) and a poor solvent for paraffin

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