Low-Pressure Cold Plasma Surface Treatment for Adhesion Improvement in Composite Structures

Weberová, Zuzana

doi:10.14332/svc19.proc.0063

Cited by 2 publications

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“…As presented in [ 4 , 32 ], plasma treatment of PE powders does not influence their melting and crystallization temperatures. The analysis of changes in the MFI of treated and non-treated powders is summarized in Table 2 .…”

Section: Resultsmentioning

confidence: 99%

“…According to theoretical assumptions, the results can be further improved by enhancing adhesion between the reinforcement and matrix. Another field that can benefit from this method is metal inserts for rotomolding, as indicated in [ 32 ]. Based on our results, there is strong potential for industrial applications of plasma-treated powders, which can be further improved thanks to this new and reliable testing method.…”

Section: Resultsmentioning

confidence: 99%

“… Strength testing methods ( a ) lap-shear test [ 32 ]; ( b ) pull-off test with mold [ 28 ]; ( c ) pull-off test with dolly [ 33 ]; ( d ) pull-out test [ 33 ]. …”

Section: Figurementioning

confidence: 99%

“…Therefore, there are more interfaces where complete or partial failure can occur, which cannot be controlled and can compromise the results. Pull-out test ( Figure 1 d): The method mentioned in [ 32 , 33 ] has a simple mold and is designed to overcome the fragility of samples made from low-adhesion polymers. It makes possible to compare different treatments for improved adhesion with nontreated materials.…”

Section: Introductionmentioning

confidence: 99%

“…The method mentioned in [ 32 , 33 ] has a simple mold and is designed to overcome the fragility of samples made from low-adhesion polymers. It makes possible to compare different treatments for improved adhesion with nontreated materials.…”

Section: Introductionmentioning

confidence: 99%

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New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials

et al. 2021

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This paper describes a newly developed testing method for determination of the adhesivity of a film sintered from thermoplastic powder. This method is based on the modified EN 15337 standard. Application of this method enables an effective development of thermoplastic composites with enhanced adhesion between reinforcement and matrix and/or high-quality joints between plastics and dissimilar materials. The proposed method was successfully tested on a series of polyethylene powders treated in the oxygen atmosphere for 0–1200 s. Adhesion to metal and glass substrates in dependence on treatment conditions is described along with powder wettability and X-ray photoelectron spectroscopy analysis. The results show an increase in adhesion to metal by 580% and to glass by 1670% for the longest treatment time, compared to a nontreated powder. Sintering of treated powders revealed a strong influence of treatment time on the melting process. The XPS analysis confirmed the formation of new oxygen groups (C–O, C=O, O–C=O). The method reveals a specific behavior of powders based on treatment conditions, which is crucial for the optimization of plasma treatment for the improved adhesion, applicability of polymer powders, and a development of composite materials.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“… Strength testing methods ( a ) lap-shear test [ 32 ]; ( b ) pull-off test with mold [ 28 ]; ( c ) pull-off test with dolly [ 33 ]; ( d ) pull-out test [ 33 ]. …”

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials

et al. 2021

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Adhesion Improvement between PE and PA in Multilayer Rotational Molding

Sezemský

Špatenka

2021

Polymers

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The aim of this study is to investigate a multilayer structure made of polyethylene and polyamide by rotational molding. Due to the different polarity of these polymers, it is difficult to ensure enough adhesion between created layers. Two methods leading to improve adhesion are introduced. Plasma modification of polyethylene powder, after which new functional groups are bound to the treated surface, may enhance specific adhesion by forming hydrogen bonds with-CONH groups of polyamide. Different strategies of adding material to the mold give rise to complicated interlayer which increases joint strength by mechanism of the mechanical adhesion. Mechanical tests show a significant improvement of joint strength, where treated samples reached two-fold values of peel strength (7.657 ± 1.024 N∙mm−1) against the untreated sample (3.662 ± 0.430 N∙mm−1). During bending test, delamination occurred only in samples that were made of the untreated polyethylene. Adding polyamide during the melting stage of polyethylene powder in rotomolding resulted in the formation of entanglements which improve the peel strength almost eight times in comparison with the sample where the polyethylene was left to completely melt and create smooth interlayer surface.

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Low-Pressure Cold Plasma Surface Treatment for Adhesion Improvement in Composite Structures

Cited by 2 publications

References 0 publications

New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials

New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials

Adhesion Improvement between PE and PA in Multilayer Rotational Molding

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