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TITLE
DEDICATION
CERTIFICATE
DECLARATION
ACKNOWLEDGEMENT
ABBREVIATIONS
CONTENTS
1. INTRODUCTION AND OBJECTIVES
2. SWELLING AND SOLVATION PROPERTIES OF CROSSLINKED COPOLYMERS: AN OVERVIEW.
2.1. Swelling and Solvation Studies on Polyacrylamide and Polystyrene Networks.
2.1.a.Cyclization and Multiple Cross linking
2.1.b.Inhomogeneity
2.1.c. Heterogeneity
2.2. Swelling of Polymer Networks - Theoretical Treatment
2.2.a.Unconstrained Network Models.
2.2.b.Flory - Rehner Theory
2.3. Swelling Parameters
2.3.a.Solubility Parameter and Cohesive Energy Density
2.3.b.Solubility Parameter of Solvent Mixture.
2.3.c. Polymer - Solvent Interaction Parameter
2.4. Encapsulation and controlled Release in Organized Networks.
2.4.a.Micro Encapsulation
2.4.b.Encapsulation - Importance and Application
3. HYDROGELS AND THEIR SOLVATION BEHAVIOUR; RESULTS AND DISCUSSION
3. l. Introduction
3.2. The Concept of Swelling and Solvation - Theoretical Treatment
3.3. Swelling Studies in Acrylamide Based Polymers.
3.3.1 Divinyl Benzene - Crosslinked Polyacrylamide
3.3.1.a.Swelling Studies of DVB Cross linked Polyacrylamide
3.3.1.b.Molecular Weight Between Cross links for DVB Cross linked Polyacrylamide
3.3.1.c.Effect of Polymerisation Condition on Swelling Behaviour.
3.4. Hexanedioldimethacrylate cross linked Polyacrylamide
3.4 1.Swelling Studies of Hexanedioldimethacrylate Cross linked Polyacrylamide
3.4.2.Molecular Weight between Cross links for Hexanedioldimethacrylate Cross linked Polyacrylamde
3.5 Swelling Studies in Styrene Based Cross linked Polymers.
3.5.1.Divinyl Benzene Cross linked Polystyrene.
3.5.1.a.Swelling studies of DVB Cross linked Polystyrene
3.5.1.b.Molecular Weight Between Cross links for DVB Coss linked Polystyrene
3.5.1.c.Effect of Polymerisation Condition on Swelling Behaviour
3.5.2.Hexanedioldimethacrylate Crosslinked Polystyrene
3.5.2. a. Swelling Behaviour of Hexanediol dimethacrylate Cross linked Polystyrene
3.5.2.b.Molecular Weight Between Cross links for Hexanedioldimethacrlate Crosslinked Polystyrene
4. ENCAPSULATION AND CONTROLLED RELEASE IN CROSSLINKED POLYMERIC MATRICES AND THE SWELLING BEHAVIOUR OF HOST - GUEST ASSEMBLIES.
4.1. Introduction
4.2. The concept of Encapsulation and Controlled Release - Theory
4.3. Guest - Encapsulated Polyacrylamide Hydrogels.
4.3.1 Benzoic acid Encapsulated DVB Cross linked Polyacrylamides.
Fig. 4.2 Scanning electron micrographs
4.3.1.a.Release of Benzoic Acid from Guest Encapsulated DVB Cross linked Polyacrylamide.
4.3.1.b. Swelling Behaviour of Guest Encapsulated DVB Cross linked Polyacrylamide.
4.3. l.c.Molecular Weight Between Crosslinks for the Guest Encapsulated AA - DVB Copolymer
4.3.2 Guest Encapsulated Hexane Diol Dimethacrylate Crosslinked Polyacrylamide.
4.3.2.a.Release Studies of Guest Encapsulated HDDMA Crosslinked Polyacrylamide.
4.3.2.b. Swelling Behaviour of Benzoic acid Encapsulated HDDMA Crosslinked Polyacrylamide
4.3.2.c.Molecular Weight Between Cross links for Guest Encapsulated HDDMA Crosslinked Polyacrylamide.
4.4. Guest Systems Encapsulated in Polystyrene Networks.
4.4.1.Guest Encapsulated DVB Cross linked Polystyrene
Fig. 4.12. Scanning electron micrographs
4.4.1.a.Release studies of Guest Encapsulated DVB Cross linked Polystyrene
4.4.1.b.Swelling Studies of Guest Encapsulated DVB Cross linked Polystyrene
4.4.1.c.Molecular Weight Between Cross links for Guest Encapsulated PS-DVB Cross linked Polymer
4.4.2.Guest Encapsulated HDDMA Crosslinked Polystyrene
Fig.4.17 Scanning electron micrographs
4.4.2.a.Release Studies of Guest Encapsulated PS-HDDMA Resin
4.4.2.b. Swelling Behaviour of Guest Encapsulated PS-HDDMA Resin
4.4.2.c.Quantitative Interpretation of the Results
4.5. Thermal Analysis of Cross linked Copolymers and the Host-Guest System
5. EXPERIMENTAL
5.1 General
5.2 Synthesis of Polyacrylamide- Divinyl Benzene Copolymers: General Procedure
5.3 Swelling Studies of DVB Cross linked Polyacrylamide
5.4 Determination of Solubility Parameter and Cohesive Energy Density of DVB Crosslinked PA
5.5. Density Measurements: General Procedure
5.6 Calculation of Molecular Weight Between Cross links
5.7 Preparation and Swelling Studies of DVB Cross linked Polyacrylamide using Water- Methanol Mixture as the Solvent.
5.8 Molecular Weight Between Cross links for PA-DVB Resin Prepared by using Water-Methanol Mixture as Diluent
5.9 Preparation of Hexanedioldimethacrylate Cross linked Polyacrylamide
5.10 Swelling Studies of HDDMA Cross linked PA
5.11 Solubility Parameter of HDDMA Cross linked PA
5.12 Molecular Weight Between Cross links for PA-HDDMA Resin
5.13 Synthesis of Styrene-Divinylbenzene Copolymer: General Procedure
5.14 Swelling Studies on DVB Cross linked PS
5.15 Density Measurements: General Procedure
5.16 Molecular Weight Between Cross links for PS-DVB Resin
5.17 Synthesis of DVB Cross linked PS by Suspension Polymerisation: General Procedure
5.18 Swelling Studies of DVB Cross linked PS. (prepared by suspension polymerisation)
5.19 Molecular Weight Between Cross links for PS-DVB Resin (prepared by suspension polymerisation)
5.20 Synthesis of Styrene-•Hexanedioldi methacrylate Copolymer: General Procedure
5.21 Swelling Studies on PS-HDDMA Resin
5.22 Molecular Weight Between Cross links for PS-HDDMA Resin
5.23 Encapsulation of Benzoic Acid in DVB Cross linked Polyacrylamide
5.24 Release of Benzoic Acid from Guest Encapsulated DVB Cross linked PA
5.25 Swelling Studies on Guest Encapsulated DVB Cross linked PA
5.26 Molecular weight Between Cross links for Guest Encapsulated DVB Cross linked PA
5.27 Preparation of Benzoicacid Encapsulated Hexanedioldimetharcylate Cross linked Polyacrylamide: General Procedure
5.28 Release of Benzoic Acid from Guest Encapsulated PA-HDDMA Resin
5.29 Swelling Studies on Guest-Encapsulated PA-HDDMA Resin
5.30 Molecular Weight Between Cross links for Guest Encapsulated PA-HDDMA Resin
5.31 Encapsulation of Benzoic Acid in DVB Cross linked Polystyrene
5.32 Controlled Release of Benzoic Acid from Guest-Encapsulated: PS-DVB Resin
5.33 Swelling Studies on Guest-Encapsulated PS-DVB Resin
5.34 Molecular Weight Between Cross links for Guest-encapsulated PS-DVB Resin
5.35 Preparation of Benzoic Acid Encapsulated HDDMA Cross linked Polystyrene
5.36 Controlled Release of Benzoic Acid from Guest Encapsulated PS-HDDMA Resin
5.37 Swelling Studies on Guest-Encapsulated PS-HDDMA Resin
5.38 Molecular Weight Between Cross links for Guest Encapsulated PS-HDDMA Resin
5.39 Thermogravimetric Analysis of the Polymers
6. CONCLUSION AND OUTLOOK
REFERENCES
LIST OF PUBLICATIONS