X-RAY SCATTERING STUDIES ON MOLECULAR STRUCTURES OF STAR AND DENDRITIC POLYMERS
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- Title
- X-RAY SCATTERING STUDIES ON MOLECULAR STRUCTURES OF STAR AND DENDRITIC POLYMERS
- Authors
- Jin, S; Jin, KS; Yoon, J; Heo, K; Kim, J; Kim, KW; Ree, M; Higashihara, T; Watanabe, T; Hirao, A
- Date Issued
- 2008-12
- Publisher
- POLYMER SOC KOREA
- Abstract
- We studied the molecular shapes and structural characteristics of a 33-armed, star polystyrene (PS-33A) and two 3(rd)-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 (Theta) 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 I: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.
- Keywords
- 33-armed star polystyrene; 3(rd)-generation dendrimer-like star-branched poly(methyl methacrylate)s; small angle X-ray scattering; molecular shape; internal chain structure; good solvent condition; theta solvent condition; LIVING ANIONIC-POLYMERIZATION; ORGANOSILICATE THIN-FILMS; HEXAGONALLY PERFORATED LAYER; POLYSTYRENE-B-POLYISOPRENE; LIQUID-CRYSTAL ALIGNMENT; DEFINED BRUSH POLYIMIDE; FULLY RODLIKE BACKBONE; BRANCHED POLYMERS; DILUTE-SOLUTION; CRYSTALLIZATION BEHAVIOR
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28804
- DOI
- 10.1007/BF03218582
- ISSN
- 1598-5032
- Article Type
- Article
- Citation
- MACROMOLECULAR RESEARCH, vol. 16, no. 8, page. 686 - 694, 2008-12
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