Synthesis and characterization of model dumbbell polymers
SCIE
SCOPUS
- Title
- Synthesis and characterization of model dumbbell polymers
- Authors
- Rajan, M; Velthem, PV; Zhang, MF; Cho, DH; Chang, TH; Agarwal, US; Bailly, C; George, KE; Lemstra, PJ
- Date Issued
- 2007-05-01
- Publisher
- AMER CHEMICAL SOC
- Abstract
- High molecular weight dumbbell shaped polymers were prepared by atom transfer radical polymerization (ATRP) to grow branches from repeat units of end blocks of a symmetric triblock copolymer. The triblock copolymer itself was prepared by polymer-polymer coupling of a commercially obtained alpha,omega-end functionalized polystyrene as central block with end-functionalized poly(chloromethylstyrene) that we synthesized by nitroxide-mediated polymerization. Temperature gradient interaction chromatography (TGIC) enabled the estimation of the terminal hydroxyl functionality of the high molecular weight alpha,omega-difunctional polystyrene as 75%. Size exclusion chromatography (SEC) and H-1 NMR enabled the determination of molecular weights and verification of the structures of the intermediate and the cleaved products. Size exclusion chromatography coupled with light scattering (SEC-LS) and scanning force microscopy (SFM) were used to confirm that the desired dumbbell architecture was obtained.
- Keywords
- FREE-RADICAL POLYMERIZATION; BLOCK-COPOLYMERS; CYLINDRICAL BRUSHES; ANIONIC-POLYMERIZATION; STAR POLYMERS; CHAIN-ENDS; POLYSTYRENE; RHEOLOGY; SHELL; CORE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23432
- DOI
- 10.1021/MA061926F
- ISSN
- 0024-9297
- Article Type
- Article
- Citation
- MACROMOLECULES, vol. 40, no. 9, page. 3080 - 3089, 2007-05-01
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- There are no files associated with this item.
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