Novel perfluoropolyethers containing 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole blocks: synthesis and characterization

Avataneo, M.; Navarrini, W.; Patto, U. De; Marchionni, G.

doi:10.1016/j.jfluchem.2009.07.007

Cited by 18 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This fluid nowadays is usually a Galden type perfluoropolyether (PFPE) polymer (Bassi, 2011) composed of an ether chain (equation (1)) structure: Equation 1 where the exact m to n ratio is defined by the manufacturer. The carbon‐fluorine bonds give an optimal stability for the continuous stress on the fluid (Avataneo et al 2009) during the heating and cooling periods of the VPS process. Each available Galden type has a fixed boiling point; however after continuous use the Galden may have a notable drift in this parameter due to the continuous thermal stresses it encounters.…”

Section: Introduction To the Technology Of Vapour Phase Solderingmentioning

confidence: 99%

Characterization of vapour phase soldering process zone with pressure measurements

Géczy

Illés

Péter

et al. 2013

Soldering &Amp; Surface Mount Technology

View full text Add to dashboard Cite

Purpose: With the spreading of Vapour Phase Soldering (VPS) technology it is important to understand and optimize the process itself. The paper presents a novel approach on the process zone characterization for direct feedback on the state of vapour, for better monitoring, control and understanding of the process. Practical implications:The VPS process may benefit from the more precise saturation detection, giving better control on the heat transfer, enabling more efficient production with the reduction of idle time, and resulting in better soldering quality. Social implications:Reducing the idle time of the VPS stations may result in better efficiency and smaller power consumption, reducing the environmental impact of the method.

show abstract

Section: Introduction To the Technology Of Vapour Phase Solderingmentioning

confidence: 99%

Characterization of vapour phase soldering process zone with pressure measurements

Géczy

Illés

Péter

et al. 2013

Soldering &Amp; Surface Mount Technology

View full text Add to dashboard Cite

show abstract

“…After β-scission, the radical formed can initiate the reaction (Scheme 40). 233 Under UV light, Avataneo et al 233 synthesized a block copolymer by using the peroxidic Galden products from Solvay S.A. and 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole (TTD). 233 Their structures are depicted in Figure 5.…”

Section: Radical Reactionsmentioning

confidence: 99%

Diversity of Synthetic Approaches to Functionalized Perfluoropolyalkylether Polymers

et al. 2021

View full text Add to dashboard Cite

Perfluoropolyalkylethers (PFPAEs) are a class of fluorinated polymers having −OCF2–, −OCF2CF2–, and −OCF2CF(CF3)– as common chain units. The ether linkages distinguish them from other famous fluorinated polymers such as poly(tetrafluoroethylene). Their higher mobility highlighted by below zero glass transition temperatures permit them to be noncrystalline, which makes them easy to use for many applications. They possess interesting tribological properties, combined with an excellent thermal and chemical stability, make them very useful as lubricants. However, after chemical modifications, they also demonstrated to be very useful in numerous applications as surfactants, electrolytes, high performance coatings, vitrimers, or microfluidic devices, to give a few examples. This Perspective aims to summarize all the chemical modifications reported on these PFPAEs to provide a new insight into their potential utility in emerging fields. Indeed, the end group can modulate the properties of PFPAE-based materials such as lubricity, superhydrophobicity, biofouling, antibacterial activity, amphiphilicity, and the ability to react further with comonomers under photochemical and thermal processes. It can also modulate their intrinsic properties such as viscosity and solubility in common organic solvents. The chemical modifications are sorted in five main parts: the condensation reactions, the nucleophilic reactions, the click chemistry reactions, the radical reactions, and finally reactions going through other mechanisms or requiring a multistep process. They can be employed as such or for further polymerization processes depending on the targeted application. Examples of applications are thoroughly described to demonstrate their current usefulness and to help provide direction for their future use.

show abstract

“…The SO3H groups are placed as terminals of the lateral chains, conferring hydrophilicity and consequently good wettability to the photoactive coating, whereas the backbone of the polymer is highly hydrophobic due to the presence of C-F bonds (Navarrini 2008). AD is a random copolymer of TFE and 2,2,4-trifluoro-5trifluoromethoxy-1,3-dioxole (TTD), characterized by outstanding chemical stability (Persico 2013), low refractive index (equal to 1.327) and Tg of 130°C (Avataneo 2009). AD was employed in solution using GALDEN ® HT110 (Solvay Specialty Polymers) as solvent, a perfluoropolyether-based solvent with boiling point of 110°C.…”

Section: Photocatalytic Freestanding Membranesmentioning

confidence: 99%

Immobilized TiO2 nanoparticles produced by flame spray for photocatalytic water remediation

et al. 2016

View full text Add to dashboard Cite

Anatase/rutile mixed-phase titanium dioxide (TiO2) photocatalysts in the form of nanostructured powders with different primary particle size, specific surface area and rutile content were produced from the gasphase by flame spray pyrolysis (FSP) starting from an organic solution containing titanium(IV) isopropoxide as Ti precursor. Flame spray produced TiO2 powders were characterized by means of X-Ray diffraction, Raman spectroscopy and BET measurements. As prepared powders were mainly composed of anatase crystallites with size ranging from 7 to 15 nm according to the synthesis conditions. TiO2 powders were embedded in a multilayered fluoropolymeric matrix to immobilize the nanoparticles into freestanding photocatalytic membranes. The photocatalytic activity of the TiO2-embedded membranes toward the abatement of hydrosoluble organic pollutants was evaluated employing the photodegradation of rhodamine B in aqueous solution as test reaction. The photoabatement rate of best performing membranes significantly overcomes that of membranes produced by the same method and incorporating commercial P25-TiO2.

show abstract

Novel perfluoropolyethers containing 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole blocks: synthesis and characterization

Cited by 18 publications

References 8 publications

Characterization of vapour phase soldering process zone with pressure measurements

Characterization of vapour phase soldering process zone with pressure measurements

Diversity of Synthetic Approaches to Functionalized Perfluoropolyalkylether Polymers

Immobilized TiO2 nanoparticles produced by flame spray for photocatalytic water remediation

Contact Info

Product

Resources

About