Correlation between Surface Morphology and Microscopic Photoluminescence of Two-Component Polymer Blends

• Main Authors: CHENG,Huei-chung, 鄭惠中
• Other Authors: K.C. Lin
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/74999041481250907615

碩士 === 輔仁大學 === 物理學系 === 96 === The properties of two-component polymer blends (MEH-PPV/PS) with various molecular weights and compositions are studied in this work. Using the lab-assembled SNOM system, which consists of the scanning fiber probe with the laser source, the inverted microscope, the photon counter, and the scanning probe controller console, we can correlate the surface morphology and microscopic photoluminescence. The characteristics of phase-separated blend films are consistent with AFM measurements and fluorescence images. The intensity difference between bright-dim regions and the signal levels of photoluminescence at the interfaces of MEH-PPV/PS domains are assessed. Using a simplified viscosimeter, the relative viscosity of blends in different solvents is also investigated that might suggest how the polymer aggregates form within the blends.