MORPHOLOGICAL OBSERVATION OF SINGLE-CHAIN POLY (METHYL METHACRYLATE) PARTICLES* |
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| Authors: | NI Ming CHEN Liusheng JIA Shijun JIN Xigao GE Shouren Atsushi TAKAHARA Tisato KAJIYAMA |
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| Affiliation: | Institute of Chemistry; The Chinese Academy of Sciences; Beijing 100080; China Department of Materials Physics and Chemistry; Graduate School of Engineering; Kyushu University; Fukuoka 812; Japan |
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| Abstract: | Tapping mode atomic force microscope has been applied to observe single-chain PMMAparticles which were stored for six months at room temperature after sprayed from verydilute solutions in good solvents, good/poor mixed solvents, and a theta solvent. Monodis-perse PMMA standards of molecular weights ranging from 7.90×104 to 1.3×106 wereused to investigate the effect of molecular weight oh the size of the single-chain PMMA particles. These single-chain particles showed close to spherical shapes. The morphology of single-chain PMMA particles of a given molecular weight was found to be identical in spite of different solvents used for solution spraying.Molecular weight dependence of the particle dimension was also found.The diameters of single-chain PMMA particles after correction of tip-geometry effect were compared to the values estimated from molecular weight and density. |
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| Keywords: | Atomic force microscope Morphology Single-chain particle Polymethylmethacrylate |
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