TY - JOUR
T1 - X-ray scattering studies on molecular structures of star and dendritic polymers
AU - Jin, Sangwoo
AU - Kyeong, Sik Jin
AU - Yoon, Jinhwan
AU - Heo, Kyuyoung
AU - Kim, Jehan
AU - Kim, Kwang Woo
AU - Ree, Moonhor
AU - Higashihara, Tomoya
AU - Watanabe, Takumi
AU - Hirao, Akira
PY - 2008/12
Y1 - 2008/12
N2 - We studied the molecular shapes and structural characteristics of a 33-armed, star polystyrene (PS-33A) and two 3rd-generation, dendrimer-like, star-branched poly(methyl methacrylate)s with different architectures (PMMA-G3a and PMMA-3Gb) and 32 end-branches under good solvent and theta (Θ) solvent conditions by using synchrotron small angle X-ray scattering (SAXS). The SAXS analyses were used to determine the structural details of the star PS and dendrimer-like, star-branched PMMA polymers. PS-33A had a fuzzy-spherical shape, whereas PMMA-G3a and PMMA-G3b had fuzzy-ellipsoidal shapes of similar size, despite their different chemical architectures. The star PS polymer's arms were more extended than those of linear polystyrene. Furthermore, the branches of the dendrimer-like, star-branched polymers were more extended than those of the star PS polymer, despite having almost the same number of branches as PS-33A. The differences between the internal chain structures of these materials was attributed to their different chemical architectures.
AB - We studied the molecular shapes and structural characteristics of a 33-armed, star polystyrene (PS-33A) and two 3rd-generation, dendrimer-like, star-branched poly(methyl methacrylate)s with different architectures (PMMA-G3a and PMMA-3Gb) and 32 end-branches under good solvent and theta (Θ) solvent conditions by using synchrotron small angle X-ray scattering (SAXS). The SAXS analyses were used to determine the structural details of the star PS and dendrimer-like, star-branched PMMA polymers. PS-33A had a fuzzy-spherical shape, whereas PMMA-G3a and PMMA-G3b had fuzzy-ellipsoidal shapes of similar size, despite their different chemical architectures. The star PS polymer's arms were more extended than those of linear polystyrene. Furthermore, the branches of the dendrimer-like, star-branched polymers were more extended than those of the star PS polymer, despite having almost the same number of branches as PS-33A. The differences between the internal chain structures of these materials was attributed to their different chemical architectures.
KW - 33-Armed star polystyrene
KW - Good solvent condition
KW - Internal chain structure
KW - Molecular shape
KW - Small angle x-ray scattering
KW - Theta solvent condition
UR - https://www.scopus.com/pages/publications/58149388597
U2 - 10.1007/BF03218582
DO - 10.1007/BF03218582
M3 - Article
AN - SCOPUS:58149388597
SN - 1598-5032
VL - 16
SP - 686
EP - 694
JO - Macromolecular Research
JF - Macromolecular Research
IS - 8
ER -