The effect of surface characteristics of polymeric materials on the strength of bonded joints

Niem, P. I. F.; Lau, Trent; Kwan, Kin-ming.

doi:10.1163/156856196x00760

Cited by 21 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It may be possible that the strain energy introduced by mechanical polishing to the polymer surface has helped the plasma to create more polar groups on the surface during exposure under DC glow discharge. Niem et al12 have shown that adhesive joint strength of PMMA adherends increases in the mechanically abraded sheet. It has been reported that under nonabraded condition, the joint strength is 1100 N , and it increases by about 30% up to 1501 N , using a 1.20‐micron abraded sheet.…”

Section: Resultsmentioning

confidence: 99%

“…Among different surface treatments, the low‐pressure plasma treatment has been found most effective in respect of uniformity of surface modification and absence of chemical hazards 8–10. Apart from surface modification by glow discharge, another simple but effective method to improve adhesion is by mechanical polishing of polymer surface, resulting in improvement of joint strength 11, 12…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surface modification of HDPE and PP by mechanical polishing and DC glow discharge and their adhesive joining to steel

Bhowmik

Ghosh

Ray

2001

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:To improve the strengths of the adhesive joints of high density polyethylene (HDPE) and polypropylene (PP) to steel, the surfaces of HDPE and PP sheets have been treated by DC glow discharge to increase the polar component of surface energy significantly. Present study investigates the effect of mechanical polishing prior to surface modification of substrates of HDPE and PP sheets by exposure to DC glow discharge, on the surface energy and their adhesive joint strength to steel. The mechanical polishing has been carried out by abrading with 120, 220, 400, 600, 800, and 1000 grade emery paper of grit sizes 8.33, 4.54, 2.5, 1.67, 1.2, and 1 micron, respectively. The surface energy of a given surface has been evaluated by measuring contact angles of sessile drops of two test liquids of known surface tension components, such as deionized water and formamide. It is observed that 800-grade emery paper of grit size 1.2 micron has been found most effective in terms of their reduction in contact angles and enhancement of their surface energies. The change in surface energy due to surface modification has also been evaluated by measuring the surface energies of unpolished sheets exposed to DC glow discharge. The surface modification of the polymers by glow discharge for 120 s at a power level of 13 W decreases the contact angle more on mechanically polished specimens than that observed on unpolished sheets. Due to glow discharge treatment, the polar component of surface energy increases significantly in HDPE and PP, especially when they are mechanically polished (800 grade) prior to glow discharge. However, in case of the HDPE sheets, the effect of glow discharge on the polar component of surface energy is significantly higher compared to that for dispersion component of surface energy, whereas the polar component of surface energy of the PP sheet is lower than the dispersion component of surface energy. But in both the cases, mechanical polishing prior to glow discharge appears to affect the polar component of surface energy. Mechanical polishing of the HDPE and PP sheets by abrading with 800-grade emery paper prior to glow discharge treatment, increases the adhesive joint strengths over those observed in case of unpolished polymers exposed to glow 1140discharge. However, the use of prior mechanical polishing increases the joint strength only by a little more than 10% compared to a five to seven times increase in strength observed as a consequence of exposure to glow discharge of as received samples.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface modification of HDPE and PP by mechanical polishing and DC glow discharge and their adhesive joining to steel

Bhowmik

Ghosh

Ray

2001

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…1) Adhesion strength, which itself depends on the following: a) contaminants; b) surface roughness [5]; c) humidity. 2) Stress level.…”

Section: B Fatigue and Reliability Of Packaging Adhesivesmentioning

confidence: 99%

Parametric dependence of fatigue of electronic adhesives

Gladkov

Bar‐Cohen

1999

IEEE Trans. Comp. Packag. Technol.

View full text Add to dashboard Cite

Adhesives used in electronic applications are subject to high cyclic shear stresses resulting from differential thermal expansion of the bonded materials.In this study, an attempt has been made to experimentally determine the dependence of the fatigue life of two packaging epoxy adhesives on: temperature, peak cycling stress as a fraction of adhesion strength, and cyclic frequency. Both epoxies were used to bond surfaces of aluminum and silicon. Tensile lap-shear specimens were used.

show abstract

“…Neim et al [8] worked on the effect of surface roughness on the joint strength and found that the mechanical interlocking between adherend and base drastically increases due to roughening of the surface in contact. In case of aluminum adherend used in a lap joint, due to the formation of disband [9] at the middle strength remains unaffected but the tensile loading is resisted by the end of the joint.…”

Section: Introductionmentioning

confidence: 99%

Combine experimental and FEM analysis of adhesive bonded single lap joint with Al-alloy flat adherends and pre-embedded artificial defects

Sahu

Mishra

2019

SN Appl. Sci.

View full text Add to dashboard Cite

Adhesive bonded lap joint is considered to be better substitute to riveted or welded joints for aerospace, marine and structural applications. It is due to the ability to develop relatively lower stress concentration and fatigue severity in highly dynamic environment. In real practice, there are defects present in the joint interface that decide the strength and durability of the component. Hence, it is required to understand the joint strength with different defect geometries. In this paper, a combined experimental and finite element method is conducted to evaluate the strength of lap joint of Al-alloy flat plate, pre-embedded with defects of various geometries: square, rectangle, circular and elliptical. The results of experimental and FEM analysis are converging, and indicate the clear variation of strength due to different type of defects. It encourages further analysis.

show abstract

The effect of surface characteristics of polymeric materials on the strength of bonded joints

Cited by 21 publications

References 16 publications

Surface modification of HDPE and PP by mechanical polishing and DC glow discharge and their adhesive joining to steel

Surface modification of HDPE and PP by mechanical polishing and DC glow discharge and their adhesive joining to steel

Parametric dependence of fatigue of electronic adhesives

Combine experimental and FEM analysis of adhesive bonded single lap joint with Al-alloy flat adherends and pre-embedded artificial defects

Contact Info

Product

Resources

About