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Volumn 42, Issue 5, 2009, Pages 1512-1518

Functional hyperbranched polymers using ring-opening metathesis polymerization of dicyclopentadiene with monoterpenes

Author keywords

[No Author keywords available]

Indexed keywords

CHAIN TRANSFER; COMPLEX STRUCTURE; D-LIMONENE; DENDRITIC UNITS; DICYCLOPENTADIENE; GENERAL METHOD; GLASS TRANSITION TEMPERATURE; HYDRODYNAMIC VOLUMES; HYPERBRANCHED; HYPERBRANCHED POLYMERS; INTRINSIC VISCOSITY; LIMONENE OXIDE; MARK-HOUWINK; METATHESIS REACTIONS; MONOMER ADDITION; MONOTERPENES; NMR SPECTROSCOPY; POLYMER CHAINS; POLYNORBORNENE; RING OPENING METATHESIS POLYMERIZATION;

EID: 66549110418     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma802441t     Document Type: Article
Times cited : (64)

References (44)
  • 2
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    • Frechet, J. M. Science 1994, 263, 1710-1715.
    • (1994) Science , vol.263 , pp. 1710-1715
    • Frechet, J.M.1
  • 23
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    • Mathers, R. T.; Damodaran, K. J. Polym. Sci., Part A: Polym. Chem. 2007, 45, 3150-3165.
    • Mathers, R. T.; Damodaran, K. J. Polym. Sci., Part A: Polym. Chem. 2007, 45, 3150-3165.
  • 32
    • 66549090647 scopus 로고    scopus 로고
    • At lower monomer concentrations, the formation of intramolecular cyclic loops is expected. In contrast, high monomer concentrations would favor cross-linking and the formation of insoluble networks
    • At lower monomer concentrations, the formation of intramolecular cyclic loops is expected. In contrast, high monomer concentrations would favor cross-linking and the formation of insoluble networks.
  • 36
    • 0032097013 scopus 로고    scopus 로고
    • For AB3 systems, DB (2D sD)/[(2/3)(3D 2sD L)]; see: Hanselmann, R.; Holter, D.; Frey, H. Macromolecules 1998, 31, 3790-3801.
    • For AB3 systems, DB (2D sD)/[(2/3)(3D 2sD L)]; see: Hanselmann, R.; Holter, D.; Frey, H. Macromolecules 1998, 31, 3790-3801.
  • 37
    • 66549122958 scopus 로고    scopus 로고
    • The CH2 and CH protons were assigned based on edited HSQC spectra. Calculations of representative models with cis- and trans-alkenes in Scheme 2were built using GaussView. The initial structures were optimized using the PM3 semiempirical method, and then they were further optimized using the DFT method at the b3lyp/6-31g** level. The optimized structures were used for the calculation of NMR chemical shifts at the b3lyp/6-311 g(2d,p) level using the GIAO method. All calculations were performed using the G03W program.
    • The CH2 and CH protons were assigned based on edited HSQC spectra. Calculations of representative models with cis- and trans-alkenes in Scheme 2were built using GaussView. The initial structures were optimized using the PM3 semiempirical method, and then they were further optimized using the DFT method at the b3lyp/6-31g** level. The optimized structures were used for the calculation of NMR chemical shifts at the b3lyp/6-311 g(2d,p) level using the GIAO method. All calculations were performed using the G03W program.
  • 38
    • 84868955024 scopus 로고    scopus 로고
    • The NMR resonance at δ 5.66 ppm represents one of the two cyclopentene alkene C H bonds. The other cyclopentene alkene C H resonance overlaps with the resonance for cis/trans-disubstituted alkenes (δ 5.6 5.2 ppm).
    • The NMR resonance at δ 5.66 ppm represents one of the two cyclopentene alkene C H bonds. The other cyclopentene alkene C H resonance overlaps with the resonance for cis/trans-disubstituted alkenes (δ 5.6 5.2 ppm).
  • 39
    • 84868936900 scopus 로고    scopus 로고
    • Further characterization of the overlapping resonances for L and D units is in progress. The resonances for L and D units were resolved with the following equation: AreaD units (Areaδ 5.6 5.2) 3(Areaδ 5.66). The sD units were assumed to contain contributions from the vinyl, allyl, and trisubstituted alkene regions according to the following equation: AreasD units ∼ (Areaδ 5.90 -5.81) (Area 5.81 5.72) (Areadela; 5.15-5.05).
    • Further characterization of the overlapping resonances for L and D units is in progress. The resonances for L and D units were resolved with the following equation: AreaD units (Areaδ 5.6 5.2) 3(Areaδ 5.66). The sD units were assumed to contain contributions from the vinyl, allyl, and trisubstituted alkene regions according to the following equation: AreasD units ∼ (Areaδ 5.90 -5.81) (Area 5.81 5.72) (Areadela; 5.15-5.05).
  • 40
    • 0012925191 scopus 로고    scopus 로고
    • For AB2 systems, DB (D T)/(D L T); see: Hawker, C. J.; Lee, R.; Frechet, J. M. J. J. Am. Chem. Soc. 1991, 113, 4583-4588.
    • For AB2 systems, DB (D T)/(D L T); see: Hawker, C. J.; Lee, R.; Frechet, J. M. J. J. Am. Chem. Soc. 1991, 113, 4583-4588.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.