Reaction of polyvinyl alcohol with aluminium isopropoxide

✍ Scribed by Rita Hippe; Anton L. German

• Book ID: 103072605
• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 202 KB
• Volume: 14
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(78)90184-2

✦ Synopsis

The uncatalyzed and oxalic acid catalyzed modification of polyvinyl alcohol (PVA) with aluminium isopropoxide have been studied for reaction in a suspension of powdered PVA in boiling benzene. Isopropyl alcohol (IPA) formed during the reaction was removed by continuous distillation of an IPA-benzene mixture. The reaction was initially quite fast but slowed up rapidly and practically stopped when only 4--12% of the OH-groups had reacted. Thermogravimetric analysis (TGA) showed that products with 6.8 mole Al/100mole VA exhibit a significant rise in decomposition temperature from 250 to 285L The characteristics are attributed to the occurrence of vicinal OH-groups in PVA.