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Volumn 39, Issue 19, 2006, Pages 6720-6736

Entanglement transition of randomly branched polymers in the hyperbranched class

Author keywords

[No Author keywords available]

Indexed keywords

HYPERBRANCHED POLYMERS (HBP); MELT RHEOLOGY; MOLE FRACTIONS; RUBINSTEIN MODEL;

EID: 33749655067     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma0603276     Document Type: Article
Times cited : (13)

References (67)
  • 22
    • 33749664958 scopus 로고    scopus 로고
    • Thesis, University of Durham
    • Keeney, A. J. Thesis, University of Durham, 1998.
    • (1998)
    • Keeney, A.J.1
  • 23
    • 33749671385 scopus 로고    scopus 로고
    • Thesis, University of Durham
    • Anderson, I. C. Thesis, University of Durham, 2000.
    • (2000)
    • Anderson, I.C.1
  • 24
    • 33749655952 scopus 로고    scopus 로고
    • note
    • For fractionation in THF as eluent, small secondary peaks were observed at small elution volumes for some HBP samples. These were initially believed to be due to aggregates which did not fit into any of the pores in the columns and hence elute together at early elution times before the exclusion limit of the columns. However we found that the addition of acetic acid suppressed the secondary peaks and we now believe that the small secondary peaks may instead be due to an ionic exclusion effect. This is where the sample accumulates partial negative charges due to the presence of polar carbonyl groups. The carbonyl groups induce charge in the eluent and therefore at the surface of the packing material. The polymer charges interact with partial charges on the surface of the packing material and result in "ionic exclusion", where the sample is repelled from the column media surface and is ejected from the column before the exclusion limit of the column. The addition of a little acetic acid suppresses the formation of charge and reduces ionic interaction, leading the sample to elute normally.
  • 26
  • 27
    • 33749668859 scopus 로고    scopus 로고
    • Thesis, University of Durham
    • de Luca, E. Thesis, University of Durham, 2002.
    • (2002)
    • De Luca, E.1
  • 45
    • 33749661000 scopus 로고    scopus 로고
    • See eq6.122 in ref 44
    • See eq6.122 in ref 44.
  • 46
    • 33749659358 scopus 로고    scopus 로고
    • Thesis, University of Leeds
    • Kunamaneni, S. Thesis, University of Leeds, 2003.
    • (2003)
    • Kunamaneni, S.1
  • 54
    • 33749682625 scopus 로고    scopus 로고
    • See pp 191-193 in ref 3
    • See pp 191-193 in ref 3.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.