Kinetics of anhydride formation in xerogels of poly(acrylic acid).
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 8866028.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The aim of this work was to study the cross-linkage of xerogels made of Carbopol of different molecular weight (polymers deriving from polyacrylic acid), and the influence exerted by different percentages of beta-cyclodextrin upon the cross-linkage percentage. Xerogels were obtained by high-pressure compression and cross-linking was studied by measuring the weight loss of different formulations over a temperature range of 70 to 190 degrees C. Kinetics of anhydride formation were found to follow a second-order mechanism with an activation energy of approximately 25 kcal mol-1.
Medical subject headings
- Acrylic Resins
- Drug Carriers
- Gels
- Polyvinyls
- beta-Cyclodextrins