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Volumn 37, Issue 26, 2004, Pages 9814-9820

Controlled variation of spacer segment in hyperbranched polymers: From densely branched to lightly branched systems

Author keywords

[No Author keywords available]

Indexed keywords

CALIBRATION; DENDRIMERS; DETECTORS; GLASS TRANSITION; MOLECULAR WEIGHT; POLYETHERS; SOLVENTS; THERMAL EFFECTS;

EID: 11444255234     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma048738e     Document Type: Article
Times cited : (44)

References (52)
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    • note
    • 15 in terms of improved yield as well as its facileness.
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    • note
    • The proton NMR spectra of all the monomers are available in the Supporting Information.
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    • This value was determined for the starting cyclohexanedimethanol and is assumed to be the same in the case of the polymer.
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    • note
    • The extent of cyclization could increase with increasing spacer length and flexibility. Since topological constraints in hyperbranched structures impose a maximum of one cyclization per polymer molecule, its effect on the chain conformation might be expected to be very limited.
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    • Yan et al. ascribe the difference in behavior to the different reactivities of the propogating and initiating centers during polymer growth, which renders the simple statistical analysis of degree of branching inapplicable. Yan, D.; Muller, A. H. E.; Matyjaszewski, K Macromolecules 1997, 30, 7024.
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    • note
    • The molecular weights and PDI's of various fractionated samples are tabulated in the Supporting Information.
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    • note
    • In the case of HP-C2, wherein the DB is reflected in the aromatic methyl region, one sees little change in the relative intensities of the various peaks for different molecular weight fractions. The NMR spectra of three representative fractions are available in the Supporting Information.
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    • See Figure 5 in ref 9b
    • See Figure 5 in ref 9b.
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    • note
    • g, value of only ca. 30°C.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.