Citation: NI Ming, CHEN Liusheng, JIA Shijun, JIN Xigao, GE Shouren, Atsushi TAKAHARA, Tisato KAJIYAMA. MORPHOLOGICAL OBSERVATION OF SINGLE-CHAIN POLY (METHYL METHACRYLATE) PARTICLES*[J]. Chinese Journal of Polymer Science, ;1997, 15(4): 368-372. shu

MORPHOLOGICAL OBSERVATION OF SINGLE-CHAIN POLY (METHYL METHACRYLATE) PARTICLES*

Received Date: 18 April 1997

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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