Molecular dynamics in fluorinated side-chain maleimide copolymers as studied by broadband dielectric spectroscopy

Tsuwi, Julius; Appelhans, Dietmar; Zschoche, Stefan; Zhuang, Rong‐Chuan; Friedel, Peter; Häußler, Liane; Voit, Brigitte; Kremer, Friedrich

doi:10.1007/s00396-005-1346-x

Cited by 7 publications

(14 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After melting of side chains, main chain fluctuation is slowed down and simultaneously the side chain undergoes its own glass transition, presented here as the d-process. Thus we assign the d-relaxation to the dynamic glass transition of the fluoroalkane domain in accord to our earlier work [29] and other studies [46]. The d-process exhibits a temperaturedependent relaxation rate described by Eq.…”

Section: The A-and D-processessupporting

confidence: 71%

“…3, Tables 3 and 4). The a-process becomes faster with increasing length of the aliphatic diol spacers due to the internal plasticization effect as observed in other polymeric systems [29,30]. The T g of polymer 1 could not be estimated from the VFT fit because it presents a different kind of dynamics, which is separately discussed as a b*-process.…”

Section: The A-processmentioning

confidence: 98%

“…This indicates that the molecular origin of g SF -and g B -processes is not the same. The g SF -relaxation is assigned to librational motion of the perpendicular component of the fluoroalkyl end group in accordance to our previous work [29] and similar investigations [45,46]. The activation energy of g SF -relaxation is compared to other values in other fluorinated side-chain polymers: 31 kJ/mol [45] (with eC 4 F 9 fluoroalkane unit on the side chain), 17 kJ/mol [46] (eC 6 F 13 ), 30e36 kJ/mol [29] (eC 7 F 15 ), 31 kJ/mol [45] (eC 8 F 17 ), 36e37 kJ/mol [29] (eC 9 F 19 ) and 38e40 kJ/mol (eC 10 F 21 ) in this study.…”

Section: The G Sf -Processmentioning

confidence: 98%

“…The polymers used in Refs. [29,45] have a linear backbone separated by different lengths of methyl spacers from the fluoroalkane side chain unit. A structure of ordered phase [52,53] was envisaged in analysing the results.…”

Section: The G Sf -Processmentioning

confidence: 99%

“…For a maleimide backbone as that used in Ref. [29], the T g for the CF domain was found (calculated from T o values) in the range from 26 to 50 C. This indicates that mobility of the CF domain depends on the flexibility of the main chain. The T g 's from DSC and the solidesolid transition(s) from T-SAXS may be considered to reflect motion of the CF microphase.…”

Section: The A-and D-processesmentioning

confidence: 99%

See 4 more Smart Citations

Molecular dynamics in semifluorinated side-chain polyesters as studied by broadband dielectric spectroscopy

Tsuwi¹,

Hartmann²,

Kremer³

et al. 2006

Polymer

Self Cite

View full text Add to dashboard Cite

Section: The A-and D-processessupporting

confidence: 71%

Section: The A-processmentioning

confidence: 98%

Section: The G Sf -Processmentioning

confidence: 98%

Section: The G Sf -Processmentioning

confidence: 99%

Section: The A-and D-processesmentioning

confidence: 99%

See 3 more Smart Citations

Molecular dynamics in semifluorinated side-chain polyesters as studied by broadband dielectric spectroscopy

Tsuwi¹,

Hartmann²,

Kremer³

et al. 2006

Polymer

Self Cite

View full text Add to dashboard Cite

Molecular dynamics in semifluorinated‐side‐chain polysulfone studied by broadband dielectric spectroscopy

Tsuwi

Pospiech

Jehnichen

et al. 2007

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

The molecular dynamics of a set of polysulfone polymers have been studied with broadband dielectric spectroscopy. The materials comprise main-chain polysulfones attached to semifluorinated (SF) oxydecylperfluorodecyl side chains. Through the analysis of the dielectric data together with information from differential scanning calorimetry and small-angle X-ray scattering, it can be shown that the oxydecylperfluorodecyl side chains are microphase-separated and form nanodomains with an independent dynamic glass-transition (d SF ) relaxation. In addition to the a process (which is the glass transition of the main chain), other relaxation processes can be detected with Arrhenius-type activation energies of 38-90 6 2 kJ/mol. A g SF process, observed only in polysulfone with SF side chains, can be assigned to librational fluctuations of the perpendicular component of the fluoroalkyl group. A g B relaxation reflects fluctuations of the dipole moments (O¼ ¼S¼ ¼O and C¼ ¼O) of the polymer, whereas a b process, with high activation energies (>70 6 2 kJ/mol), is assigned to packaging defects in the material. A detailed description of the processes is provided together with a proposed relaxation scheme.

show abstract

Superhydrophobic films of UV‐curable fluorinated epoxy acrylate resins

Lin¹,

Liao²,

Huang³

et al. 2010

Polymer International

View full text Add to dashboard Cite

Photopolymerization processes are often used in industrial applications because of their solvent-free formulations and various advantages over conventional thermal processes. Fluorinated monomers and oligomers yield coatings of great interest because of the peculiar characteristics of fluorine atoms: these coatings show hydrophobicity, chemical stability, weathering resistance, etc. Novel UV-curable fluorinated epoxy acrylate oligomers were synthesized from 1H,1H-perfluorohexan-1-ol, 1,6-hexamethylene diisocyanate (HDI) and epoxy acrylate (EA). The HDI plays the role of a spacer group in the side chain between the EA backbone chain and the fluorinated segment. This new spacer containing a urethane moiety with long alkyl groups can exhibit a self-organization effect through the formation of strong hydrogen bonding. This resulted in a stiffening of the whole HDI urethane-perfluoalkyl chain to form nanostructure surface segregation. The designed fluorinated EA with fluoroalkyl (C 5 F 11 ) units in the side chain exhibited a contact angle of about 151 • , which is in the superhydrophobic range.

show abstract

Molecular dynamics in fluorinated side-chain maleimide copolymers as studied by broadband dielectric spectroscopy

Cited by 7 publications

References 29 publications

Molecular dynamics in semifluorinated side-chain polyesters as studied by broadband dielectric spectroscopy

Molecular dynamics in semifluorinated side-chain polyesters as studied by broadband dielectric spectroscopy

Molecular dynamics in semifluorinated‐side‐chain polysulfone studied by broadband dielectric spectroscopy

Superhydrophobic films of UV‐curable fluorinated epoxy acrylate resins

Contact Info

Product

Resources

About