Production of Polyacrylic Acid Homo- and Copolymer Films by Electrochemically Induced Free-Radical Polymerization: Preparation and Swelling Behavior

2007 ◽  
Vol 248 (1) ◽  
pp. 207-212 ◽  
Author(s):  
Johanna Bünsow ◽  
Diethelm Johannsmann
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Polyacrylic Acid ◽  
Free Radical Polymerization ◽  
Swelling Behavior ◽  
Copolymer Films

scholarly journals SWELLING BEHAVIOR OF POLY (AAM_MA) HYDROGEL MATRIX AND STUDY EFFECTS PH AND IONIC STRENGTH, ENFORCEMENT IN CONTROLLED RELEASE SYSTEM

2018 ◽  
Vol 10 (6) ◽  
pp. 318
Author(s):  
Faiq F. Karam ◽  
Asawer A. Mhammed Alzayd
Keyword(s):  
Free Radical ◽  
Ionic Strength ◽  
Controlled Release ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Swelling Behavior ◽  
Charge Ratio ◽  
Thermal Gravimetric ◽  
Release System ◽  
Negative Effect

Objective: The objective of this study was to estimate the performance of Acrylamide-malice acid (AAM_MA) hydrogel preparatory by free radical polymerization to loading/release Atenolol and Ciprofloxacin drugs from aqueous solution to be used in a controlled release system.Methods: Free radical polymerization method has been used to prepare (AAM-MA) hydrogel. The prepared hydrogel was characterized by Fourier transform infrared (FTIR), Thermal Gravimetric Analysis/Derivative Thermal Gravimetric (TGA/DTG) and Field Emission Scanning Electron Microscopy (FE-SEM) techniques. The pH-dependent swelling behavior was investigated in addition to the effective ionic strength on adsorption and release system of the drug in vitro.Results: Results showed that the highest swelling ration in pH=7.4 and the same value of pH for the release of the drug. Thermal analysis test for prepared hydrogel showed good thermal stability. The hydrogel showed a negative effect with an increase saline contact Calcium carbonate appeared to have highly effect on releasing drugs from the polymeric network.Conclusion: Higher ability of poly (AAM-MA) hydrogel to act as a carrier for the Ciprofloxacin and Atenolol with highest swelling and releasing under following conditions: at pH 7.4, at temperature 37 °C and the effect of ionic strength (charge/ratio) which indicate that the smaller radius have less effect on release and the largest charge have negative effect on release ratio that attributed to cation formation inter and intra complex surface hydrogel. 

Non-isothermal Kinetics of Free Radical Polymerization of 2-Phenylethyl (Meth)acrylate

2018 ◽  
Vol 8 (3) ◽  
pp. 585-594
Author(s):  
Khdbudin Mulani ◽  
Ravindra Ghorpade ◽  
Surendra Ponrathnam ◽  
Nayaku Chavan ◽  
Kamini Donde
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Isothermal Kinetics ◽  
Kinetics Of

Oxygen-Initiated Free-Radical Polymerization of Alkyl Acrylates at High Temperatures

2021 ◽  
Author(s):  
Shi Liu ◽  
Lauren Chua ◽  
Ahmad Arabi Shamsabadi ◽  
Patrick Corcoran ◽  
Abhirup Patra ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
High Temperatures ◽  
Free Radical Polymerization ◽  
Alkyl Acrylates
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