Physical aging of poly(vinylpyrrolidone) under different humidity conditions

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

The physical aging of poly(vinylpyrrolidone) (PVP K25) was studied under different storage conditions by positron lifetime spectroscopy and scanning electron microscopy. The transition from the glassy state (at RT and 55% RH) to the completely plasticized wet rubbery state (at RT and 75% RH) is not continuous in PVP K25. It was found that not only the actual water content of the material but also its storage history determines the size distribution of free volume holes in it. At 65% RH a slow anomalous structure formation was observed. By the means of ab initio calculations on simplified model molecules, it was determined that polymer chains and water molecules are able to form a hydrogen bound "network" under certain humidity conditions.

Original languageEnglish
Pages (from-to)795-800
Number of pages6
JournalMacromolecules
Volume35
Issue number3
DOIs
Publication statusPublished - Jan 29 2002

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Atmospheric humidity
Aging of materials
Molecules
Free volume
Positrons
Water content
Hydrogen
Polymers
Spectroscopy
Scanning electron microscopy
Water

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Physical aging of poly(vinylpyrrolidone) under different humidity conditions. / Süvegh, K.; Zelkó, R.

In: Macromolecules, Vol. 35, No. 3, 29.01.2002, p. 795-800.

Research output: Contribution to journalArticle

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