The influence of plasma treatment on the surface properties of high-performance thermoplastic

Gleich, Henning; Criens, R.M.; Moslé, H. G.; Leute, U.

doi:10.1016/0143-7496(89)90030-4

Cited by 37 publications

(11 citation statements)

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“…Their evolution versus time and power enable us to propose a mechanism that involves atomic oxygen, OH' and H' radicals. I NTRO DUCT10 N Low-temperature plasmas have been widely used to improve polymer surface properties [1][2][3][4][5][6][7] …”

Section: Synopsismentioning

confidence: 99%

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Interactions of polymer model surfaces with cold plasmas: Hexatriacontane as a model molecule of high‐density polyethylene and octadecyl octadecanoate as a model of polyester. I. Degradation rate versus time and power

Clouet

Shi

1992

J of Applied Polymer Sci

100

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SYNOPSISTo gain a better understanding of the evolution of polymer surfaces under cold plasmas, model polymer surfaces were studied. The degradation products and the gas phase were investigated by mass and optical emission spectrometry. Their evolution versus time and power enable us to propose a mechanism that involves atomic oxygen, OH' and H' radicals. I NTRO DUCT10 N Low-temperature plasmas have been widely used to improve polymer surface properties 1-7 by introducing new functional These treatments lead to the formation of radicals that are, very likely, the promoters of surface cr~sslinking,~'-~~ functionalization, and d e g r a d a t i~n . *~-~~ The modification is the result of different plasma species such as ions, excited neutrals, as well as UV radiation. Therefore, it is very difficult to establish a relationship between these species and the relevant mechanisms. Moreover, polymer surfaces are very often poorly defined because of the presence of initiators and different additives: It can thus be difficult to pinpoint the origin of the modification observed. In order to simplify these systems, we decided to study model polymer surface^.^^,^^ Our goal is to establish a relationship between the physical and the chemical makeup of a polymer and its behavior in cold plasmas. Our strategy is based on the understanding of the surface modification of a very simple model whose chemical structure and morphology are well defined and that of the same model after its endowment with a chemical function. Hexatriacontane ( C36H74), which is known to share many structural features with highdensity polyethylene, has often been chosen as a model of this polymer. Crystallization of this pure * To whom correspondence should be addressed.Journal of Applied Polymer Science, Vol. 46, 1955-1966 (1992 crystallizes also in lozenge-shaped tablets as shown in Figure 1. In a first step, we have determined the effect of the presence of an ester function by comparing the behavior of C36H74 and OOD under plasma. In a second step, the model molecules have been compared with their corresponding polymers, that is, high-density polyethylene (cristallinity > 90% ) and polycaprolactone -[ (CH2)&02 In-(cristallinity N 55% ), respectively, in order to exemplify the role of the molecular weight of the amorphous domains and the chain ends. This will be the purpose of our next paper. The cold plasma treatment leads to bond breaking on the polymer surface; the fragments formed are kicked out into the gas phase and can be analyzed by mass spectrometry and optical emission spectroscopy. In this study, we report the influence of the plasma parameters (time, power) investigated in terms of ( a ) weight loss both on the parafinic model and on the ester, ( b ) concentration of the small molecules in the effluents originating from surface degradation, and (c ) emission intensities of the excited species. 1955

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Section: Synopsismentioning

confidence: 99%

“…Low-temperature plasmas have been widely used to improve polymer surface properties [1][2][3][4][5][6][7]…”

Section: Ntro Duct10 Nmentioning

confidence: 99%

Interactions of polymer model surfaces with cold plasmas: Hexatriacontane as a model molecule of high‐density polyethylene and octadecyl octadecanoate as a model of polyester. I. Degradation rate versus time and power

Clouet

Shi

1992

J of Applied Polymer Sci

100

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“…As described in [1] and [2], the surface energy was calculated from the Dupr6 equation. The surface energies of the different liquids used, which are not solvents for …”

Section: Methodsmentioning

confidence: 99%

Reactivity of a polypropylene surface modified in a nitrogen plasma

Poncin-Epaillard

Chevet

Brosse

1994

Journal of Adhesion Science and Technology

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Reactivity of a polypropylene surface modified in a nitrogen plasmaAbstract-The modification of a polypropylene surface in a nitrogen plasma is studied in terms of degradation, crosslinking, functionalization, and activation (radical site creation.) The most important reactions are functionalization through primary amine formation and radical creation through methyl-group elimination. Degradation and crosslinking are competitive and the latter is more important when the plasma conditions (exposure time, discharge power) are severe. Exomethylenic bonds (CH2=C) are formed preferentially over crosslinking reactions. Chemical titrations are described for radical and amine concentrations on the polypropylene surface.

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“…Cohesive failure of the LCP material was observed, indicating that the actual bonding strength was higher than the inherent strength of LCP. Gleich et al 28 showed that both corona treatment and low-pressure oxygen plasma treatment increased the surface energy of a glass-fiber-filled LCP of type Vectra A410, but that the bonding strength to aluminum was positively affected only with certain adhesives such as a two-component polyurethane system. Cohesive failure in the LCP also occurred when a thin surface veil was melted into the LCP before bonding it to the vinyl ester.…”

Section: Bonding Strengthmentioning

confidence: 98%

Transport and adhesion properties of an unlined and a liquid‐crystalline polymer–lined vinyl ester thermoset exposed to severe environments

Römhild¹,

Bergman²,

Hedenqvist

2004

J of Applied Polymer Sci

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ABSTRACT:The application of liquid-crystalline polymers (LCP) as lining materials for fiber-reinforced plastics was investigated. The lining consisted of one uniaxially and one biaxially oriented LCP and, for comparison, a fluorinated ethylene propylene copolymer. The lining was attached to a glass-fiber-reinforced vinyl ester thermoset. The laminates were examined with respect to their chemical resistance, transport/barrier properties, and lining/matrix adhesion behavior. The transport properties were determined by gravimetric desorption measurements and cup tests. It was shown that the LCP was suitable as a lining in organic solvent and nonoxidizing acid environments. Diffusivities, equilibrium concentrations, and transmission rates of water, methanol, toluene, and trichloroethylene were obtained in the LCP, the fluorinated ethylene propylene copolymer, and also, in the case of the vinyl ester, of hydrochloric acid. In general, the diffusivity and transmission rate in the LCP were one to several orders of magnitude lower than those of the fluorinated ethylene propylene copolymer and the vinyl ester. The reinforcement in the glass-fiber-reinforced plastic led to an increase in the water and methanol diffusivities and transmission rates, which was probably attributable to liquid capillary diffusion. The lap-shear bonding strength between the LCP and the vinyl ester was poor, but it was improved almost sixfold by a combined abrasive and oxygen plasma treatment.

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The influence of plasma treatment on the surface properties of high-performance thermoplastic

Cited by 37 publications

References 1 publication

Interactions of polymer model surfaces with cold plasmas: Hexatriacontane as a model molecule of high‐density polyethylene and octadecyl octadecanoate as a model of polyester. I. Degradation rate versus time and power

Interactions of polymer model surfaces with cold plasmas: Hexatriacontane as a model molecule of high‐density polyethylene and octadecyl octadecanoate as a model of polyester. I. Degradation rate versus time and power

Reactivity of a polypropylene surface modified in a nitrogen plasma

Transport and adhesion properties of an unlined and a liquid‐crystalline polymer–lined vinyl ester thermoset exposed to severe environments

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