Peel adhesion and viscoelasticity of poly(ethylene-co-vinyl acetate)-based hot melt adhesives. II. The influence of wax

Shih, Hsi-Hsin; Hamed, G. R.

doi:10.1002/(sici)1097-4628(19970118)63:3<333::aid-app8>3.0.co;2-o

Cited by 31 publications

(18 citation statements)

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“…6,7 The blends of EVA/ tackifier resin are classified into four types in terms of miscibility: (1) completely immiscible system, (2) system that has lower critical solution temperature (LCST), (3) system that has upper critical solution temperature (UCST), and (4) completely miscible system. The relation between viscoelasticity and adhesive properties of EVA/tackifier resin blends has been studied by our group 1-5 and others.…”

Section: Introductionmentioning

confidence: 99%

“…The relation between viscoelasticity and adhesive properties of EVA/tackifier resin blends has been studied by our group 1-5 and others. 6,7 The blends of EVA/ tackifier resin are classified into four types in terms of miscibility: (1) completely immiscible system, (2) system that has lower critical solution temperature (LCST), (3) system that has upper critical solution temperature (UCST), and (4) completely miscible system. These four types of blend are referred to as "immiscible type," "LCST type," "UCST type," and "miscible type," respectively.…”

Section: Introductionmentioning

confidence: 99%

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Miscibility and adhesive properties of ethylene vinyl acetate copolymer (EVA)-based hot-melt adhesives. I. Adhesive tensile strength

Takemoto

Kajiyama

Mizumachi

et al. 2002

J. Appl. Polym. Sci.

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A series of ethylene vinyl acetate copolymers (EVA) were blended with some tackifier resins that are made from wood extracts, and possible relations between their miscibility and properties as hot-melt adhesives (HMA) were investigated. From our previous report on miscibility of various EVA-based HMAs, we chose some blends that represent some of typical miscibility types and measured their adhesive tensile strengths. When the blends were miscible at testing temperatures, the temperature at which the maximum value of adhesive tensile strength was recorded tended to move toward higher temperature as tackifier content of blends increased. This result corresponds to the glass transition temperature (T g ) of the blends that became higher as tackifier content of blends increased when blend components were miscible. In terms of HMA performances, we suggest that factors other than miscibility affect absolute values of adhesive tensile strength more directly than miscibility; this idea has to be investigated further in a future study.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Miscibility and adhesive properties of ethylene vinyl acetate copolymer (EVA)-based hot-melt adhesives. I. Adhesive tensile strength

Takemoto

Kajiyama

Mizumachi

et al. 2002

J. Appl. Polym. Sci.

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“…The relationship between the viscoelastic and adhesion properties were investigated by us [1][2][3][4] and other research groups. 5,6 In this article, the adhesive properties (shear and tensile strength) of the blends of EVA/CaCO 3 /terpene phenol system were measured both on wood and aluminum adherends over a wide range of test rates and temperatures. In addition, peel strength and creep responses were also measured only on wood adherend but over a broad range of experimental parameters.…”

Section: Introductionmentioning

confidence: 99%

Rheological study on the adhesion properties of the blends of ethylene vinyl acetate/terpene phenol adhesives

Turreda

Sekiguchi

Takemoto

et al. 1998

J. Appl. Polym. Sci.

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ABSTRACT:Measurements of the shear, tensile, peel, and creep strength of ethylene vinyl acetate (EVA)/CaCO 3 /terpene phenol adhesive system at three different ratios [100/60/0 (EVA-O), , and 60/36/40 (EVA-40) by weight, using wood and aluminum as adherends] were conducted. Over a wide range of temperatures and rates of deformation, adhesion shear, tensile, and peel strength results, as well as the creep response over a broad range of temperature and stresses, were found to yield a single master curve by means of the reduced-variable technique. It was observed that the peak of EЉ representing Tg, shifted toward higher temperatures as the amount of terpene phenol in the blend was increased. The most obvious effect of increasing the tackifier resin was the shifting of the adhesion strength master curves to the direction of lower rates. The shift was associated with the rise in Tg as the blend ratio was increased. The influence of the tackifier resin in modifying the viscoelastic properties of the adhesive was further described in a comparison of the adhesion strength master curves with corresponding dynamic viscoelastic curves of the adhesive films. The master curves for the creep response of the adhesives showed that the stress-breaking time relationship shifts toward longer time for EVA-40 with high Tg. Thus, it was found that the strength of adhesion is due mainly to dynamic effects in the adhesive of a viscous nature in the same way to the cohesive strength of the viscoelastic materials.

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“…Similar large linear features, spaced approximately one mm apart, 26 have previously been observed on polymer fracture surfaces of beams that failed in a stick-slip manner. [26][27][28] Fine texture, mirroring the metal surfaces in Fig. 4, was observed in SEM images of all beams examined.…”

Section: B Fracture Surface Morphologymentioning

confidence: 65%

Effect of storage in aqueous environments on polymer–metal interfacial fracture

et al. 2004

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The effect of environmental exposure on the fracture characteristics of two polymer-metal interfaces was measured using a four-point bend delamination test. Films of high-molecular-weight polymethylmethacrylate (PMMA) resin were spin-cast on metal-coated silicon wafer substrates, for which the metal was either titanium or aluminum. Sandwich beam specimens were fabricated and stored in one of the following conditions prior to the bending tests: vacuum desiccator at 25°C, vacuum desiccator at 65°C, distilled water at 25°C, or distilled water at 65°C. Load-displacement behavior measured during bending revealed significant differences between the delamination characteristics of the two PMMA-metal interfaces after vacuum exposure which were eliminated after the degrading effects of water exposure. Three distinctive load-displacement behaviors were observed: plateau, fracture at a single load; R-curve, fracture at increasing load with crack extension; and stick-slip, cycles of gradual load increase and sudden load drop with crack extension. PMMA-Al samples stored in vacuum desiccator at 25°C exhibited R-curve fracture and the largest average crack driving force, G C , 12.2 (±0.5) J/m 2 , of all samples tested. After storage in 25°C water, these PMMA-Al samples exhibited stick-slip fracture and G C decreased to 7.1 (±2.6) J/m 2 ; storage in 65°C water further decreased G C to 2.1 (±0.7) J/m 2 . PMMA-Ti samples exhibited stick-slip fracture after storage in vacuum desiccator at 25°C, with an average G C of 8.0 (±2.6) J/m 2 ; storage in 65°C water resulted in a transition to plateau fracture and a decrease in G C to 1.6 (±0.3) J/m 2 . The initial difference and subsequent similarity are interpreted in terms of surface roughness and hydrolysis, respectively.

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Peel adhesion and viscoelasticity of poly(ethylene-co-vinyl acetate)-based hot melt adhesives. II. The influence of wax

Cited by 31 publications

References 0 publications

Miscibility and adhesive properties of ethylene vinyl acetate copolymer (EVA)-based hot-melt adhesives. I. Adhesive tensile strength

Miscibility and adhesive properties of ethylene vinyl acetate copolymer (EVA)-based hot-melt adhesives. I. Adhesive tensile strength

Rheological study on the adhesion properties of the blends of ethylene vinyl acetate/terpene phenol adhesives

Effect of storage in aqueous environments on polymer–metal interfacial fracture

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