PREPARATION OF PERFLUOROOCTANOYL-MODIFIED POLY(VINYL-ALCOHOL)S AND THEIR ADSORPTION AT AN AIR-WATER INTERFACE*

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PREPARATION OF PERFLUOROOCTANOYL-MODIFIED POLY(VINYL-ALCOHOL)S AND THEIR ADSORPTION AT AN AIR-WATER INTERFACE*

Papers | Updated：2021-06-21

- PREPARATION OF PERFLUOROOCTANOYL-MODIFIED POLY(VINYL-ALCOHOL)S AND THEIR ADSORPTION AT AN AIR-WATER INTERFACE*
- Vol. 20, Issue 2, Pages: 137-142(2002)
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- Published：20 April 2002
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PREPARATION OF PERFLUOROOCTANOYL-MODIFIED POLY(VINYL-ALCOHOL)S AND THEIR ADSORPTION AT AN AIR-WATER INTERFACE*[J]. 2002, 20(2): 137-142.
DOI：

PREPARATION OF PERFLUOROOCTANOYL-MODIFIED POLY(VINYL-ALCOHOL)S AND THEIR ADSORPTION AT AN AIR-WATER INTERFACE*[J]. 2002, 20(2): 137-142. DOI：

摘要

Perfluorooctanoyl modified poly(vinyl alcohol)s (FPVA) were prepared by means of substituting a small amountof hydroxyl groups on the backbone of poly(vinyl alcohol)

for which the initial degree of polymerization is equal to 1750.The substitution extent

defined by the number of substituting units in a chain

for the four FPVA samples was in the range of 0.5-5 perfluorooctanoyl groups per chain. The FPVA samples with the highest substitution extent still had good solubility in water.It was shown by experimental measurement at 30.3±0.1℃ that the surface tension of the aqueous solution of the highest substituted FPVA decreased to 16.6 mN/m at a higher concentration

e.g. about 0.1 g/mL.Obviously

macromolecules of FPVA exhibit a very strong tendency to adsorb at the air-water interface

because the hydrophobic perfluorooctanoyl groups in FPVA have a very high surface activity as they are in small molecular fluorinated surfactants.The chain conformation of such a model polymer adsorbed on the air-water interface was also discussed.

Abstract

Perfluorooctanoyl modified poly(vinyl alcohol)s (FPVA) were prepared by means of substituting a small amountof hydroxyl groups on the backbone of poly(vinyl alcohol)

for which the initial degree of polymerization is equal to 1750.The substitution extent

defined by the number of substituting units in a chain

e.g. about 0.1 g/mL.Obviously

macromolecules of FPVA exhibit a very strong tendency to adsorb at the air-water interface

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