Synthesis of hydrophilic ion-exchange fluoropolymers containing sulpho- and both sulpho- and carboxyl groups

Kostov, G.; Atanassov, At.

doi:10.1016/0014-3057(91)90230-l

Cited by 9 publications

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

Radiation initiated grafting of acrylic acid onto tetrafluoroethylene–ethylene copolymers

Kostov¹,

Atanassov²

1993

J of Applied Polymer Sci

View full text Add to dashboard Cite

SYNOPSISHydrophilic carboxyl containing fluoropolymers was obtained by radiation grafting of acrylic acid onto tetrafluoroethylene-ethylene copolymers with different compositions. By using simultaneous (60Co) and preirradiation (electron beam) techniques, the effect of the grafting conditions (monomer concentration, dose rate, dose, film thickness, etc.) on the degree of grafting was studied. A considerable effect of the polymer compositions, especially the C-F bonds content, and the batch irradiation on the degree of grafting was found. It was observed by scanning electron microscopy that the grafting took place mainly on the polymeric film surface and developed inward with increasing diffusion of the acrylic acid through the grafted layers.

show abstract

Radiation initiated grafting of acrylic acid onto tetrafluoroethylene–ethylene copolymers

Kostov¹,

Atanassov²

1993

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

TFE Terpolymers: Once Promising – Are There Still Perspectives in the 21st Century: Synthesis, Characterization, and Properties‐Part I

Ok,

Steinhart,

Scheler

et al. 2024

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Polytetrafluoroethylene (PTFE) exhibits outstanding properties such as high‐temperature stability, low surface tension, and chemical resistance against most solvents, strong acids, and bases. However, these traits make it challenging to subject PTFE to standard polymer processing procedures, such as thermoforming and hot incremental forming. While polymer processing at temperatures above the melting point of PTFE is already demanding, the typically large molar mass of PTFE results in extremely high melt viscosities, complicating the processing of PTFE. Also, PTFE tends to decompose at temperatures close to its melting point. Therefore, fluoropolymers obtained by copolymerizing tetrafluoroethylene (TFE) with various co‐monomers are studied as alternatives to PTFE (e.g., fluorinated ethylene‐propylene (FEP)), combining its advantages with better processability. TFE terpolymers have emerged as desirable PTFE alternatives. This review provides an overview of the synthesis with various comonomers and microstructural analysis of PTFE terpolymers and the relationships between the microstructures of TFE terpolymers and their properties.

show abstract

Copolymerization of fluorinated monomers with nonfluorinated monomers. Reactivity and mechanisms

Boutevin

Améduri

1994

Macromolecular Symposia

View full text Add to dashboard Cite

The copolymerization of two monomers usually leads to random copolymers except when one of both bears an electron‐acceptor group and the other one has an electron‐donor group. Many copolymers are commercially available, mainly in the series of hydrogenated monomers (S.M.A., GANTREZ, MALIALIM resins). The field of fluorinated copolymers is very interesting because of the strong electron‐acceptor behaviour of the fluorine atoms and more generally of halogenated atoms. Thus, after HALAR (CTFEa)‐ethylene), TEFZEL (TFE‐ethylene) and AFLAS (TFEb)‐propylene) resins, a new series of resins have been produced (copolymers of CTFE and vinyl ethers commercialized by ASAHI Corp.). So it can be considered that ACCEPTOR‐DONOR copolymerization with fluorinated monomers is one of the most important applications of that kind of research. After reminding the main mechanisms of that reaction (homopolymerization of charge transfer complex and copolymerization of free monomers), it will be discussed about the mechanism in some examples (CTFE‐vinyl ethers and other pairs of monomers). Then it will be explained how cotelomerization has provided new data to prefer a copolymerization mechanism by free monomers.

show abstract

Synthesis of hydrophilic ion-exchange fluoropolymers containing sulpho- and both sulpho- and carboxyl groups

Cited by 9 publications

References 1 publication

Radiation initiated grafting of acrylic acid onto tetrafluoroethylene–ethylene copolymers

Radiation initiated grafting of acrylic acid onto tetrafluoroethylene–ethylene copolymers

TFE Terpolymers: Once Promising – Are There Still Perspectives in the 21st Century: Synthesis, Characterization, and Properties‐Part I

Copolymerization of fluorinated monomers with nonfluorinated monomers. Reactivity and mechanisms

Contact Info

Product

Resources

About