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Intermolecular interactions in blends of poly(vinyl alcohol) with poly(acrylic acid)—1. FTIR and DSC studies

✍ Scribed by L. Daniliuc; C. De Kesel; C. David

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 532 KB
Volume: 28
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(92)90277-9

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✦ Synopsis

The i.r. spectra and the melting behaviour of blends of poly(vinyl alcohol) (PVAI) and poly(acrylic acid) (PAA) have been studied as a function of blend composition. Replacement of H-bonding interactions in pure PAA and PVAI by intermolecular interactions has been proved by analysis of the OH and C----K) stretching region in the i.r. spectra. The efficiency of these interrnolecular interactions results in a rapid decrease of the crystallinity of PVAI when the PAA content increases and its complete supression when the PAA content equals or exceeds 50 wt%. A very high negative value has been obtained for the interaction parameter by measurement of the melting point depression.

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