Some physical chemical properties of α–ω dihydroperfluoropolyethers

Marchionni, G.; Bassi, Mattia; Fontana, Giovanni; Maccone, P.; Ajroldi, Giuseppe

doi:10.1016/s0022-1139(99)00085-8

Cited by 24 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…of DM-FPEs are reported in Figure 10 as a function of the number of backbone chain atoms (N), i.e., carbon plus oxygen atoms. They increase regularly with N. In Figure 10, DM-FPEs boiling points are also compared with those of α,ω-dihydrofluoroethers (HFEs) [31] and perfluoropolyethers (PFPEs) [32]. [33].…”

Section: Boiling Pointmentioning

confidence: 99%

An Environmentally Friendly Class of Fluoropolyether: α,ω-Dialkoxyfluoropolyethers

Navarrini

Spataro

et al. 2012

Applied Sciences

View full text Add to dashboard Cite

Abstract:The α,ω-dialkoxyfluoropolyethers (DA-FPEs) characterized by the structure R H O(CF 2 CF 2 O) n (CF 2 O) m R H have been developed as a new class of environmentally friendly hydrofluoroethers (HFEs) suitable as solvents, long-term refrigerants, cleaning fluids, and heat transfer fluids. Synthetic methodologies for DA-FPEs described here consist of radical-initiated oxypolymerization of olefin, peroxy-elimination reaction in peroxidic perfluoropolyethers (P-PFPEs) and further chemical modification of α,ω-diacylfluoride PFPE. The physical properties of selected α,ω-dimethoxyfluoropolyethers (DM-FPEs) have been evaluated and compared with analogous hydrofluoropolyethers (HFPEs) having -OCF 2 H as end-groups. Atmospheric implications and global warming potentials (GWPs) of selected DA-FPEs are also considered.

show abstract

Section: Boiling Pointmentioning

confidence: 99%

An Environmentally Friendly Class of Fluoropolyether: α,ω-Dialkoxyfluoropolyethers

Navarrini

Spataro

et al. 2012

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…of DM-FPEs are compared with those of HFPE [11] and PFPE data [12] also plotted in the same Figure. The highest b.p. are those of DM-FPEs, the intermediates of HFPEs and the lowest of PFPEs.…”

Section: Boiling Pointmentioning

confidence: 99%

“…The transition temperature of the samples DM-FPEs 01 and 02 can be compared with analogous HFPEs samples (01 and 02) [11]. HFPEs 01 shows both a glass transition (100 K) and a melting transition (153 K), whereas for HFPEs 02 only the glass transition at 118 K is present.…”

Section: Melting and Glass Transition Temperaturesmentioning

confidence: 99%

“…where X(OCH 3 ) is the group contribution of OCH 3 ; X exp , the experimental value of the physical property being considered; n(CF 2 ) and n(O F ) are, respectively, the number of CF 2 and O F (oxygen atom between two fluorinated units) in the molecule, X(CF 2 ) and X(O F ) are, respectively, the group contribution of CF 2 and O F units reported in literature for HFPEs and PFPEs [11,12]. The reported group contribution has been calculated as the average value from those of all the samples and the relative standard deviation can be considered as a check of the reliability of the data.…”

Section: Group Contributions Analysismentioning

confidence: 99%

“…Some of the above data have been tentatively correlated with the compounds' structures on the basis of the well known group contribution analysis method. Furthermore, they have been compared with those of two similar homologues, hydrofluoropolyethers containing -OCF 2 H chain ends (HFPEs) [4,10,11] and perfluoropolyethers having -CF 3 chain ends (PFPEs) [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Physical properties of four α, ω-dimethoxyfluoropolyethers

Marchionni¹,

Avataneo²,

Patto³

et al. 2005

Journal of Fluorine Chemistry

View full text Add to dashboard Cite

Fluoroethers and Fluoroamines

Costello

Flynn

Owens

2004

Kirk-Othmer Encyclopedia of Chemical Technology

View full text Add to dashboard Cite

Perfluoroaliphatic ethers and tertiary amines are members of a class of unreactive compounds known in the industry as inert fluids. These compounds are prepared by electrochemical fluorination, direct fluorination using elemental fluorine or cobalt trifluoride fluorination. They are nontoxic, nonflammable, have densities of 1.7–1.9 g/cm 3 , surface tensions of 9–19 dyn/cm and lower kinematic viscosities than hydrocarbons. Their thermal stabilities are comparable to the perfluoroalkanes. Their chemical properties are characterized by their extreme unreactivity. The lower molecular weight compounds are used in the electronics industry as heat‐transfer fluids and electronic testing fluids. The higher molecular weight polymers are used as hazardous duty vacuum pump oils, specialty greases, and lubricants. Hydrofluoroethers and hydrofluoropolyethers are new classes of highly fluorinated ethers having properties intermediate between the perfluoroethers and hydrocarbon ethers. They are low in toxicity, nonflammable, with densities of 1.4–1.7 g/cm 3 , surface tensions of 13–16 dyn/cm and low kinematic viscosity. The hydrofluoropolyethers are used as heat‐transfer fluids. The hydrofluoroethers are used as heat‐transfer fluids as well as precision cleaning solvents and solvents for specialty applications such as coating deposition.

show abstract

Some physical chemical properties of α–ω dihydroperfluoropolyethers

Cited by 24 publications

References 12 publications

An Environmentally Friendly Class of Fluoropolyether: α,ω-Dialkoxyfluoropolyethers

An Environmentally Friendly Class of Fluoropolyether: α,ω-Dialkoxyfluoropolyethers

Physical properties of four α, ω-dimethoxyfluoropolyethers

Fluoroethers and Fluoroamines

Contact Info

Product

Resources

About