A Laser Scattering System For Analyzing The Phase Structure Of Polymer Blends Under Shearing

A Laser Scattering system for analyzing the phase structure of polymer blends under shearing*Major: Measure Technique and Instrument Postgraduate: Qiu yuSupervisor: Zhou zhaofeiA laser scattering system for studying the phase structure of polymer blends under shearing is particularly described in this paper, which includes optical system, sample stage, temperature controlling device, the display and analysis system.Based on the elastic light scattering principle, the system is designed: the light source is a He-Ne laser with single module. To control the polarization device two linear polarized lights with perpendicular polarized direction can be caused to meet the need of the different measurement. In order to make sample under shearing flow worm gearing is used to turn the slide. In addition, a temperature controller is used to adjust the temperature of heated sample. This can make sample under the shearing and temperature field. A CCD camera with high resolution is used to detect the light scattering signal, through A/D transducer, the output signal is imported into computer for displaying and disposing. A software system for processing the data collection, scattering pattern display and analysis is developed to study the phase structure of polymer blends, which can timely record and keep watch on the changing pattern while the sample's temperature rise up. After data collection and analysis the relative curve of scattering intensity and vector (I-q curve) % scattering intensity and temperature(I-t curve) are drawn. Then find the temperature of mutative intensity, which is the separate temperature of phase structure. At this time the performance of polymer blends is the best.