Polyesters based on Solketal derivatives for controlled release of herbicides

✍ Scribed by A. Akelah; A. Rehab; S. Kandil; M.M. El-Gamal

• Book ID: 103968738
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 570 KB
• Volume: 1
• Category: Article
• ISSN: 0928-4931
• DOI: 10.1016/0928-4931(94)90050-7

✦ Synopsis

Monomeric Solketal derivatives containing 2,4-dichlorophenoxyacetic and 4-chloro-2-methylphenoxyacetic acids have been prepared, followed by polycondensations with dicarboxylic acids, such as resorcinol and hydroquinol diacetic acids, and adipic acid, to give the corresponding linear polyesters. Crosslinked polymers were also prepared by reacting the linear polyesters produced with different ratios (5% and 10% by weight) of HMDI. In addition, investigation of the hydrolysis rates of the polymers obtained was undertaken under different simulated conditions, such as of pH and temperature. The amounts of herbicide released were evaluated by measuring the UV absorbance of the supernatant solution at different points in time.