Volume 59, Issue 3 pp. 425-431
Article

Crosslinking of poly(vinyl alcohol) using dianhydrides as hardeners

V. Giménez

V. Giménez

Universitat Rovira i Virgili, Departament de Quiḿica (Quiḿica Orgànica), Facultat de Quiḿica, Plaça Imperial Tarraco 1,43005 Tarragona, Spain

Search for more papers by this author
A. Mantecón

Corresponding Author

A. Mantecón

Universitat Rovira i Virgili, Departament de Quiḿica (Quiḿica Orgànica), Facultat de Quiḿica, Plaça Imperial Tarraco 1,43005 Tarragona, Spain

Universitat Rovira i Virgili, Departament de Quiḿica (Quiḿica Orgànica), Facultat de Quiḿica, Plaça Imperial Tarraco 1,43005 Tarragona, Spain===Search for more papers by this author
V. Cádiz

V. Cádiz

Universitat Rovira i Virgili, Departament de Quiḿica (Quiḿica Orgànica), Facultat de Quiḿica, Plaça Imperial Tarraco 1,43005 Tarragona, Spain

Search for more papers by this author

Abstract

The crosslinking reaction of poly(vinyl alcohol) (PVA) with 3,3′,4,4′-tetracarboxybenzophenone dianhydride, pyromellitic carboxylic acid anhydride, and Epiclon B-4400 as hardeners was studied either in solution or by differential scanning calorimetry. A catalyst agent had to be used in all cases. Depending on the concentration of hardener and catalyst, differences are observed. Tg values increase with the ratio of hardener and catalyst, while activation energies decrease with the amount of catalyst but little changes can be seen when different dianhydride amounts are used. The thermal properties of the final products were unaltered by the hardener used. The decomposition temperature is initiated at a similar temperature in linear and crosslinked PVA, but while uncured PVA undergoes a complete degradation in one step, crosslinked PVA degrades in several steps. © 1996 John Wiley & Sons, Inc.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.