by Kwan Chi Man Simon. / Abstract also in Chinese. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references. / Abstract --- p.i / Abstract (Chinese) --- p.iii / Acknowledgment --- p.iv / Contents --- p.v / Abbreviations --- p.viii / List of Figures --- p.xiv / List of Tables --- p.xvii / Chapter 1. --- Introduction --- p.1 / Chapter 2. --- Theoretical background --- p.4 / Chapter 2.1 --- Static laser light scattering --- p.5 / Chapter 2.2 --- Dynamic laser light scattering --- p.5 / Chapter 2.3 --- Gel Permeation Chromatography --- p.6 / Chapter 2.4 --- Chain Flexibility --- p.9 / Chapter 2.4.1 --- Flexible chains --- p.9 / Chapter 2.4.2 --- Stiff chains --- p.12 / Chapter 2.5 --- Calibration between translational diffusion coefficient D and molar mass M --- p.14 / Chapter 2.5.1 --- Conversion between line-Width and molar Mass distributions --- p.14 / Chapter 2.5.2 --- Using a set of Narrowly Distributed Standards --- p.15 / Chapter 2.5.3 --- Using Two or More Broadly Distributed Samples --- p.16 / Chapter 2.6 --- "Calibration by off-line GPC, Static and Dynamic LLS" --- p.16 / Chapter 2.7 --- References --- p.19 / Chapter 3. --- Experimental --- p.21 / Chapter 3.1 --- Laser Light Scattering Instrumentation --- p.21 / Chapter 3.2 --- Refractive index increment measurement --- p.23 / Chapter 3.3 --- Gel permeation chromatography --- p.24 / Chapter 3.4 --- References --- p.25 / Chapter 4. --- Laser Light Scattering Studies of Soluble High Performance Fluorine- containing Polyimides --- p.26 / Chapter 4.1 --- Introduction --- p.26 / Chapter 4.2 --- Sample Preparation --- p.28 / Chapter 4.3 --- Results and Discussion --- p.28 / Chapter 4.4 --- Conclusion --- p.40 / Chapter 4.5 --- References --- p.42 / Chapter 5. --- Characterization of novel optically active conjugated polyarylenes and poly(aryleneethynylene)s by a combination of Laser Light Scattering and Gel Permeation Chromatography --- p.45 / Chapter 5.1 --- Introduction --- p.45 / Chapter 5.2 --- Sample Preparation --- p.48 / Chapter 5.3 --- Results and Discussion --- p.48 / Chapter 5.4 --- Conclusion --- p.56 / Chapter 5.5 --- References --- p.61 / Appendix --- p.62 / Chapter A.1 --- Static laser light scattering --- p.62 / Chapter A.1.1 --- Scattering from a small particle --- p.62 / Chapter A. 1.2 --- Scattering from a large particle --- p.62 / Chapter A. 1.3 --- Scattering by macroscopic systems and Theory of Fluctuations --- p.65 / Chapter A.1.3.1 --- Scattering by gases and liquids --- p.67 / Chapter A. 1.4 --- Scattering by solutions of small molecules --- p.68 / Chapter A. 1.4.1 --- Scattering from polymer solution --- p.70 / Chapter A.2 --- Dynamic laser light scattering --- p.71 / Chapter A.2.1 --- Line-width measurement --- p.75 / Chapter A.2.2 --- Data analysis --- p.77