Controlling perfluoropolyalkylether rearrangements at the surface of photocured networks

Trusiano, Giuseppe; Vitale, Alessandra; Rizzello, Melania; Bonneaud, Céline; Joly‐Duhamel, Christine; Friesen, Chadron M.; Bongiovanni, Roberta Maria

doi:10.1016/j.eurpolymj.2019.109285

Cited by 9 publications

(14 citation statements)

References 38 publications

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“…These results suggest that the external surface towards air is mostly composed by the fluorinated comonomer: this is in agreement with literature data on surface migration of fluoromonomers [ 14 , 22 , 54 , 55 ]. However, with the content of fluoromonomer being quite high, there is no complete segregation of the PFPAE at the air surface; also, the surface in contact with glass is heterophasic and contains fluorine.…”

Section: Resultssupporting

confidence: 93%

“…However, with the content of fluoromonomer being quite high, there is no complete segregation of the PFPAE at the air surface; also, the surface in contact with glass is heterophasic and contains fluorine. Selective surface segregation at the air side happens when the fluoromonomer content is no more than 5 wt%: in these conditions the substrate side has a composition similar to the hydrogenated homopolymer [ 14 , 22 ].…”

Section: Resultsmentioning

confidence: 99%

“…In our recent works, we showed that a very low amount (< 5 wt%) of monofunctional PFPAE epoxides photocopolymerized with common epoxides guaranteed a significant modification of the surface properties [ 13 , 14 , 19 – 22 ], even more effective than fluorinated vinyl ethers and epoxides used previously, which pose safety issues due to the long fluoroalkylic chain [ 20 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

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Vinyl ethers and epoxides photoinduced copolymerization with perfluoropolyalkylether monomers

et al. 2020

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New perfluoropolyalkylether (PFPAE) monomers, chain extended with different alkyl groups and functionalized with vinyl ether or epoxide end-groups, were employed, together with trimethylolpropane trivinyl ether or trimethylolpropane triglycidyl ether, to produce fluorinated copolymers. The photoinduced cationic polymerization was investigated, and the PFPAE-based copolymer properties were thoroughly characterized. Interesting surface properties and two different values of refractive index were observed: thus, these fluorinated copolymers can be suitable materials for the manufacture of self-cleaning coatings and optical waveguides.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vinyl ethers and epoxides photoinduced copolymerization with perfluoropolyalkylether monomers

et al. 2020

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“…The values are rather high (i.e., always > 80%), showing polymers are cross-linked networks, and higher values are found for the polymers obtained from the PFPAE derivatives with longer hydrogenated spacers. However, the photocured films (colored but transparent) were soft, and more similar to highly viscous liquids rather than solid films due to the high content of PFPAE chains, which are very mobile [32,75,76] with a low T g , at the same time the hydrogenated phase is rubbery at room temperature (as it will be discuss later).…”

Section: Photoinduced Polymerizationmentioning

confidence: 97%

“…Synthesizing fluorinated monomers with functionalities suitable for cationic photoprocesses is therefore attractive. However, up to now few structure are available and have been investigated only as comonomers [31][32][33][34][35][36][37][38]. The synthesis of functional PFPAE derivatives is a demanding target to achieve: PFPAEs are extremely non-polar substances, poor nucleophile, and insoluble in almost all the organic solvents, except for few fluorinated solvents [29,31,32].…”

Section: Introductionmentioning

confidence: 99%

Novel perfluoropolyalkylethers monomers: synthesis and photo-induced cationic polymerization

et al. 2021

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Several difunctional oligomers were synthesized by functionalizing perfluoropolyalkylether (PFPAE) chains with different vinyl ethers and epoxides end-groups. Due to their innate synthetic challenges and demanding purification protocols, the PFPAE derivatives were obtained in low yield and with an average functionality lower than 2. However, the functionalized PFPAE oligomers were successful in being used in photo-induced cationic polymerization processes, obtaining transparent and soft films. The influences of the fluorinated chains, and various end-groups on the photopolymerization process were investigated, as well their chemical stability, thermal degradation, and surface properties. Graphical abstract

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A durable coating to prevent stress corrosion effects on the surface strength of annealed glass

et al. 2021

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The durability of an innovative polymeric coating recently developed by the authors to prevent stress corrosion in annealed glass is herein examined. The coating, having functional graded properties through the thickness, is optimised to provide a very good adhesion with glass and an excellent hydrophobic behavior on the side exposed to the environment, thus creating a good barrier to humidity, which is the triggering agent for stress corrosion. Three scenarios are analysed in terms of ageing: (i) cyclic loading, accomplished by subjecting coated samples to repetitive loading; (ii) natural weathering, performed by exposing coated samples to atmospheric agents; (iii) artificial weathering, carried out by exposing coated specimens to fluorescent UV lamps, heat and water. The durability of the coating is assessed indirectly, on the base of its residual effectiveness in preventing stress corrosion, by comparing the bending strength, obtained with the coaxial double ring test, of aged coated glass specimens with that of un-coated and freshly coated specimens. The obtained results prove that the proposed formulation is almost insensitive to cyclic loading, maintains a very good performance in case of natural weathering, whereas is slightly more sensitive to artificial weathering.

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Controlling perfluoropolyalkylether rearrangements at the surface of photocured networks

Cited by 9 publications

References 38 publications

Vinyl ethers and epoxides photoinduced copolymerization with perfluoropolyalkylether monomers

Vinyl ethers and epoxides photoinduced copolymerization with perfluoropolyalkylether monomers

Novel perfluoropolyalkylethers monomers: synthesis and photo-induced cationic polymerization

A durable coating to prevent stress corrosion effects on the surface strength of annealed glass

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