Residual reactivity for surface grafting of acrylic acid on argon glow‐discharged poly(ethylene terephthalate) (PET) films

Hsieh, You‐Lo; Wu, Meiping

doi:10.1002/app.1991.070431114

Cited by 43 publications

(22 citation statements)

References 12 publications

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“…The fluorination reaction is dependent on the hydrogen concentration ( [HI ) . If one assumes that only atomic fluorine is incorporated at the polymer backbone and that the molecular weight remains high enough to neglect end-group effects, the sum ( W ) of the hydrogen, fluorine, and carboxylic acid group concentration should be constant: (11) Combining eqs. (10) and (11) Table I.…”

Section: Kinetics Of the Cf Plasma Treatment Of Paacmentioning

confidence: 99%

On the effect of treating poly(acrylic acid) with argon and tetrafluoromethane plasmas: Kinetics and degradation mechanism

Terlingen

Takens

Gaag

et al. 1994

J of Applied Polymer Sci

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SYNOPSISPoly (acrylic acid) ( PAAc) films were treated with either a n argon or a tetrafluoromethane (CF,) plasma and subsequently analyzed with X-ray photoelectron spectroscopy (XPS). PAAc films were decarboxylated during both types of plasma treatments. In addition, during the CF4 plasma treatment, the PAAc films became fluorinated. The plasma phase during the argon plasma treatment of PAAc films was investigated with optical emission spectroscopy. It was shown that during this plasma treatment carbon dioxide, water, and possibly hydrogen were liberated from the PAAc surface. By covering the surface of PAAc films with different materials (lithium fluoride, UV fused silica, and glass) during the plasma treatment, it was possible to differentiate between photochemically induced and particleinduced changes of the surface. This method was used to show that decarboxylation during the argon plasma treatment was caused by vacuum UV radiation (wavelength < 150 nm) and the decarboxylation/ fluorination during the CF4 plasma treatment was induced by reactive fluorine-containing species from the plasma phase. Furthermore, during both processes, etching of the PAAc surface occurred. Based on these mechanisms, kinetic models were derived that could be used to describe the measured kinetic data adequately. 0 1994

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Section: Kinetics Of the Cf Plasma Treatment Of Paacmentioning

confidence: 99%

On the effect of treating poly(acrylic acid) with argon and tetrafluoromethane plasmas: Kinetics and degradation mechanism

Terlingen

Takens

Gaag

et al. 1994

J of Applied Polymer Sci

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“…[6][7][8][9] In which, the use of inner gas plasma treatment has been extensively studied to modify surface properties of polymer substrates. Free radicals are formed on the surface of substrate after plasma treatment.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] Thus, several methods have been developed to modify surfaces of these polymers to improve their water adsorption ratio. [6][7][8][9] In which, the use of inner gas plasma treatment has been extensively studied to modify surface properties of polymer substrates. Free radicals are formed on the surface of substrate after plasma treatment.…”

mentioning

confidence: 99%

Long Term Water Adsorption Ratio Improvement of Polypropylene Fabric by Plasma Pre-treatment and Graft Polymerization

Chen

Lin

Chen

et al. 2006

Polym J

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ABSTRACT:Although the hydrophilicity of polypropylene (PP) fabric surface can be improved by plasma treatment, it would obviously decay with the storage time. In this study, the graft polymerization of acrylamide (AAm) onto the surface of PP fabric was carried out by plasma pre-treatment and subsequently induced by UV-induce surface graft polymerization to improve the long term water adsorption ratio of the substrate. During the process, peroxides formed by the plasma treatment are the major factor responsible for initiating the graft polymerization. The amount of peroxide can be determined with good accuracy by the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. Results indicated that the amounts of peroxides obviously increased with the plasma treated time and treat power, and the maximum concentration of peroxide can reach about 6:0 Â 10 À7 mol/cm 2 . However, the degree of grafting was not monotonous with increasing plasma treated power. The optimum processing condition was to apply 30 W power with 10 min of treatment to achieve the maximum surface grafting efficiency. Although the surface of PP fabric can be changed from hydrophobic to hydrophilic after plasma treatment, it would obviously age after 4 d of storage. By contrast, the UV-induce surface graft polymerization of PP can keep their hydrophilic property during the storage time after 7 d, due to the covalently grafted with hydrophilic monomer. [doi:10.1295/polymj.PJ2005183] KEY WORDS Plasma Treatment / Graft Polymerization / Water Adsorption Ratio Improvement / Peroxide Determined / Polypropylene (PP) fabric was widely used due to its cheapness, low density, excellent mechanical properties, and high porosity. However, the inert surface and lack of chemical polar groups of hydrophobic polymers, restricts their applications in some fields such as sanitary products, dressing, and biomaterials.1-5 Thus, several methods have been developed to modify surfaces of these polymers to improve their water adsorption ratio. [6][7][8][9] In which, the use of inner gas plasma treatment has been extensively studied to modify surface properties of polymer substrates. Free radicals are formed on the surface of substrate after plasma treatment. Peroxides are also generated at the same time when the free radicals are exposed to air.10 Thus, the water adsorption ratio of the surface exhibits the obviously decay effect during the storage time due to the reorientation of the hydrophilic group toward the bulk of the polymer. 11To achieve a stable modification surface, subsequently graft polymerization utilizing free radicals or peroxides generated by the plasma treatment was extensively adopted by many studies. 12-14The plasma composed of inorganic gas argon leads to implantation of atoms, radical generation, and etching reaction. There have been published quite a large number of works on the polymer surface modification by graft copolymerization utilizing free radicals or peroxide generated by the plasma treatment. So far, very few works have been reported on the relationship...

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“…[20][21][22][23] Residual reactivity which was thought to be the cause of wetting dehave shown great potential because wetting properties can be remarkably enhanced without affectcay has been utilized for the grafting of vinyl monomers. 6,24,25 ing their bulk properties. [1][2][3][4][5][6][7] Plasma-modified polymer surfaces are complex The mechanisms responsible for the improved wettability and the relative contributions of the in their structure and the enhanced surface properspecific structural changes to the improvement have not been clearly distinguished on plasma- face chemistry of polyethylene (PE) was altered Plasma Treatment and Vapor Phase Grafting by grafting of vinyl monomers with different polar Glow discharge was generated by using a prependant groups.…”

Section: Introductionmentioning

confidence: 99%

“…6,24,25 ing their bulk properties. [1][2][3][4][5][6][7] Plasma-modified polymer surfaces are complex The mechanisms responsible for the improved wettability and the relative contributions of the in their structure and the enhanced surface properspecific structural changes to the improvement have not been clearly distinguished on plasma- face chemistry of polyethylene (PE) was altered Plasma Treatment and Vapor Phase Grafting by grafting of vinyl monomers with different polar Glow discharge was generated by using a prependant groups. Various levels of surface viously described glow-discharge system with a roughness on PE were generated by varying the 13.56 MHz radiofrequency generator.…”

Section: Introductionmentioning

confidence: 99%

Argon glow discharge and vapor-phase grafting of vinyl monomers on wettability of polyethylene

Lin

Hsieh

1997

J. Polym. Sci. B Polym. Phys.

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Argon glow discharge‐induced vapor‐phase grafting of vinyl monomers containing various polar pendant groups onto PE films was investigated. Relationships between the enhanced wetting properties and the level of grafting, the types of pendant groups, and the surface topographical features were established. Improved wettability of the grafted PE surfaces is attributed to both the increased surface polarity and topographical features. On AA‐grafted PE surfaces with optimal wettability, microcracks, with depths of 130 ∼ 250 nm, lengths over 10 µm, and widths between 1.5 and 6.0 µm, are proved to be a topographical feature necessary for improved wettability. With sufficient microcracks, grafting with vinyl monomers containing carbonyl groups, i.e., carboxyl, aldehyde, and ketone groups, improved surface wetting more than grafting with those containing either hydroxyl and epoxy groups. The acquired wettability of vinyl monomer‐grafted PE surface is attributed to the physicochemical synergism between the microcracks and the polar groups. © 1997 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 35: 1145–1159, 1997

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Residual reactivity for surface grafting of acrylic acid on argon glow‐discharged poly(ethylene terephthalate) (PET) films

Cited by 43 publications

References 12 publications

On the effect of treating poly(acrylic acid) with argon and tetrafluoromethane plasmas: Kinetics and degradation mechanism

On the effect of treating poly(acrylic acid) with argon and tetrafluoromethane plasmas: Kinetics and degradation mechanism

Long Term Water Adsorption Ratio Improvement of Polypropylene Fabric by Plasma Pre-treatment and Graft Polymerization

Argon glow discharge and vapor-phase grafting of vinyl monomers on wettability of polyethylene

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