Determination of Scattering Parameters of a New Copolymer by Using a Laser Scattering Method

Problem statement: In present work a poly (4 vinylphenol-co-2 hydroxethyl methacrylate) polymer, (PVPh-HEM), was selected, as a new copolymer, to study the phenomena of Optical Laser Light Scattering (OLLS). Approach: A poly (4 vinylphenol-co-2 hydroxethyl methacrylate) was investigated for its importance in the highly industrial applications in different branches. This polymer was solved in two different solvents like as Methanol and Dimethylformamide, DMF, with different concentrations 0.2, 0.4, 0.6, 0.8, 1.0×10-3 g mL^-1. OLLS data were obtained by using a self- built of laser scattering system. Results: The angular behavior of that selected polymer solution with different concentrations were studied by plotting the intensity of the scattered light against the scattering angle. The value of kc/R(θ) ratio was plotted as a function of θ through the value sin²(θ/2)+100C, showing what was called Zimm plot. Conclusion/Recommendations: From that plot the different scattering parameters such as Pap's molecular weight Mw, Second virial coefficient A², Radius of gyration RG and molecular radius D of that polymer were determined in that two different selected solvents.