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TITLE
DEDICATION
CERTIFICATE
DECLARATION
ACKNOWLEDGEMENT
GLOSSARY OF TERMS
CONTENTS
1 INTRODUCTION
2 PHOTOSENSITIVE AZO POLYMERS: CHARACTERISTICS, CONCEPTS AND CONFIGURATIONAL MECHANICS - A REVIEW
2.1 Characteristics and concepts of photoresponsive azo polymers Configurational Mechanics of chain molecules
Spectral behaviour
Viscosity
Applications
2.2 Configurational mechanics of chain molecules
2.2.1 Spatial configuration of chain molecules
2.2.2 End-to-end distribution and their moments
2.2.3 Freely jointed or Random flight chain
2.2.4 The freely rotating chain
2.2.5 Restricted rotation with independent bond rotational potentials
2.2.6 The bond rotational potentials for simple molecules
2.2.7 The rotational isomeric state approximation
2.2.8 Restricted rotation with interdependent bond rotational potentials
2.2.9 The configuration partition function: General formulations using matrix method
2.2.10 Configuration dependent properties of chain molecules
2.2.11 Mean square moments
2.2.12 Random copolymers
2.2.13 Long-range interactions
3 SYNTHESIS, CHARACTERIZATION AND PHOTORESPONSIVE PROPERTY OF AZO POLYMERS
3.1 Synthesis of polyesters with azobenzene residues in the backbone
3.2 Photostimulated property changes of azo polymers
3.2.1 Photoinduced viscosity changes of polyesters (PE) containing azo group in the backbone
Fig. 3.4 Photo-induced viscosity changes in PE, (27) before and after irradiation
Fig. 3.5 Photo-induced viscosity changes in PEvi (28) before and after irradiation
3.2.2 Photoinduced spectral change of polyesters
3.3 Experimental - General
3.4 Preparation of azobenzene 4, 4-dicarboxylic acid
3.5 Preparation of azobenzene 4, 4-dicarbonyl chloride
3.6 Synthesis of polyester PEi (23)
3.7 Synthesis of polyester PEiii (25) Photoinduced dimensional change of polyester PEiv (26)
3.8 Photoinduced dimensional change of polyester PEiv (26 1
3.8.1 Preparation of 1, 4-phenylene carboxy ethylene glycol 2, 5-dicarboxylic acid (20)
3.8.2 Synthesis of PEiv {26)
3.8.3 Photo induced viscosity change of PEiv (26)
3.9 Photoinduced dimensional change of polymer PEv (27)
3.9.1 Preparation of 1, 4-phenylene carboxy diethylene glycol 2, 5-dicarboxylic acid (21)
3.9.2 Synthesis of polyester PEv (27)
3.9.3 Photoinduced viscosity change of PEv (27) Photoinduced dimensional change of polymer PEvi (28)
3.10 2hotoinduced dimensional change of polymer PEvi (2 8)
3.10.1 Preparation of 1, 4-phenylene carboxy bisphenol A 2, 5-dicarboxylic acid (22)
3.10.2 Synthesis of polyester PEVi
3.10.3 Photoinduced viscosity change of polymer PEW, (28)
4 CALCULATION OF MEAN SQUARE END-TO-END DISTANCE USING MATRIX MULTIPLICATION METHOD
4.1 Mean square end-to-end distance of polyethylene (PM)
4.2 Mean square end-to-end distance of polyester poly (ethylene terephthalate)
4.2.1 Geometrical description of the chain unit ofpolyester - Poly (ethy1ene terephthalate)
4.2.2 Construction of the generator matrix G1
4.2.3 Construction of the generator matrix G2
4.2.4 Construction of generator matrix G3
4.2.5 Construction of generator matrix G4
4.2.6 Construction of generator matrix G5
4.2.7 Construction of generator matrix G6
4.3 Mean square end-to-end distance of polyester PEI. (26)
4.3.1 Geometrical description of the chain unit ofpolyester PEL,
4.3.2 Construction of generator matrix G1
4.3.3. Construction of generator matrix G2
4.3.4 Construction of generator matrix G3
4.3.5 Construction of generator matrix G4
4.3.6 Construction of generator matrix G5
4.3.7 Construction of generator matrix G6
4.3.8 Construction of the generator matrix G7
4.3.9 Construction of the generator matrix G8
4.3.10. Mean square end-to-end distance of copolymer having fraction of trans azo units w1 = 0 (all cis)
4.3.11 Mean square end-to-end distance of the polymerhaving wl = -1
4.3.12 Ratio of
O/U for PEi, having wl = -2
4.3.13 Ratio of
O/Mf or PEi, having wl = -3
4.3.14 Ratio of.rr2 > O/M for PEiv having wl = -4
4.3.15 Ratio of
4.3.15 Ratio of
0/M for PEi, having wl = -5
4.3.16. Ratio of
@ for PEi, having wl = -6
4.3.17. Ratio of
4.3.18 Ratio of
4.3.19 Ratio of
0/M for PEiv having wl = -9
4.4 Mean square end-to-end distance of polyester PEv (27)
4.4.1 Geometrical description of the chain unit of thepolyester P G
4.5 Mean square end-to-end distance of polyester PEvi (28)
4.5.1 Geometrical description of the chain unit ofthe polyester PEvi
4.6 Mean square end-to-end distance of polyester PEi (23)
4.6.1 Geometrical description of the chain unit of thepolyester PEi
4.7 Mean square end-to-end distance of polyester PEii (24)
4.7.1 Geometrical description of the chain unit of thepolyester PEII
4.8 Mean square end-to-end distance of polyester PEiii (25)
4.8.1 Geometrical description of the chain unit of thepolyester PEiii
5 COMPARISON BETWEEN EXPERIMENT AND THEORY
5.1 Polyester PEiv
5.2 Polyester PEA.
5.3 Polyester PEvi
6 SUMMARY AND OUTLOOK
REFERENCES
APPENDIX I
APPENDIX II