Surface modification of polymers and practical adhesion

Schonhorn, H.; Frisch, H. L.; Gaines, George L.

doi:10.1002/pen.760170705

Cited by 29 publications

(5 citation statements)

References 63 publications

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“…18 Zhang et al 28 reported that the interfacial morphology plays a crucial role in enhancement of load transfer. 29 However, no effect or even a negative effect on interfacial and mechanical properties has been reported in other studies. Folkes and Hardwick 27 have reported that the presence of transcrystalline layers leads to modest increases in flexural modulus and strength, and can thus be said to have a reinforcing effect.…”

Section: Introductionmentioning

confidence: 87%

“…Moreover, if transcrystalline layers are relatively strong, this may be advantageous in achieving good adhesion. 29 However, no effect or even a negative effect on interfacial and mechanical properties has been reported in other studies. [30][31][32] Xavier and Sharma have reported that transcrystallinity did not influence the interfacial bondage.…”

Section: Introductionmentioning

confidence: 87%

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Fundamental studies on lignocellulose/polypropylene composites: Effects of wood treatment on the transcrystalline morphology and mechanical properties

Borysiak

2012

J of Applied Polymer Sci

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Effects of alkalization, esterification, and c-irradiation of wood on the transcrystalline morphology of wood/polypropylene composites were investigated using X-ray diffraction, hot stage optical microscopy, and scanning electron microscopy. The occurrence of transcrystallization in wood-polypropylene composites is strongly dependent on the type of chemical modification of lignocellulosic materials. A detailed analysis of the results obtained proved that the transcrystallization is strongly influenced by conditions of mercerization process of wood and kind of anhydrides. Moreover, it has been found that amount of cellulose in wood plays a key role in the development of transcrystallinity. The absence of cellulose in wood seems to be unfavorable for the growth of transcrystallinity. A relationship between mechanical properties of composites and the phenomena taking place at the polymer-filler interface, controlled by chemical modifications of lignocellulose components has been evaluated. It has been established that the mechanical properties of wood composites depend on the proper choice of a modifier and are obtained after optimization of the process of modification.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 87%

Fundamental studies on lignocellulose/polypropylene composites: Effects of wood treatment on the transcrystalline morphology and mechanical properties

Borysiak

2012

J of Applied Polymer Sci

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“…Adhesiveness is a characteristic that is close related to the surface morphology, physical characteristics and wettability . In the same fashion, the adhesion in Gecko effect depends on the fibers arrangement and material ability to comply with the surface it is adhered to.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of biomimetic gecko toe pads and their characterization

Lin

2016

Polymer Engineering & Sci

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The mimicking and fabrication of gecko toe pads structures can lead to limitless applications. In this study, polypropylene (PP), polyethylene (PE) and polycaprolactone (PCL) nano‐fibers are fabricated using a porous membrane as template. The surface characteristics and physical properties of the samples yield different geometries, which determine the wetting and adhesive properties of the fabricated samples. Oriented and wave‐like shapes fibers present the Gecko effect, thanks to their ability to comply and hydrophobic asperities that uphold the water droplet when the wetting properties were tested. The samples are also found to be self‐cleaning due to their high contact angles and low contact angle hysteresis. Adhesion tests results prove that the samples are high reversible adhesion with the ability to stick to smooth surface in a dry and underwater environment. The adhesion on the samples can be enhanced with a double fibril layer or buckling property. They adhere better when the surface is not hydrophilic. By behaving in similar way as the real geckos, the results of this study show that the fabricated samples effectively present the Gecko effect. POLYM. ENG. SCI., 57:283–290, 2017. © 2016 Society of Plastics Engineers

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“…The measured contact angles can be used to estimate the SFEs of NR, NR ‐g‐ PAAEM, and NR ‐g‐ P(AAEM ‐co‐ MMA) . According to Young's equation, the relationship between the SFE and the contact angle ( θ ) is as follows :

γ_{normalL} \cos θ = γ_{normalS} - γ_{LS} - π_{normale}

where γ L and γ S are the SFEs (per unit area) of the liquid and the solid phases, respectively, and γ LS is the SFE (per unit area) at the interface between the liquid and solid phases (i.e., interfacial tension).…”

Section: Resultsmentioning

confidence: 99%

Synthesis of modified Natural Rubber with grafted poly(acetoacetoxyethyl methacrylate‐co‐methyl methacrylate) and performance of derived adhesives with GTA crosslinker

Thongnuanchan

Ninjan

Kaesaman

et al. 2017

Polymer Engineering & Sci

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The main objective of this study is to develop wood adhesives that can be cured at room temperature, based on modified natural rubber (NR) latex. Two types of modified NR, namely poly(acetoacetoxyethyl methacrylate)‐grafted NR, NR‐g‐PAAEM, and poly(acetoacetoxyethyl methacrylate‐co‐methyl methacrylate)‐grafted NR, NR‐g‐P(AAEM‐co‐MMA), were synthesized. Emulsion polymerization technique was exploited to synthesize the graft copolymers. The hydrophilicity of NR after grafting modifications was examined by means of contact angle. These results reveal that the NR become more hydrophilic after being modified with poly(acetoacetoxyethyl methacrylate), PAAEM, and/or poly(methyl methacrylate), PMMA. Adhesion properties in terms of lap shear strength were studied for wood adhesives derived from both types of NR graft copolymers, with glutaraldehyde (GTA) as the crosslinking agent. The results show that adhesives based on the NR graft copolymers gave higher lap shear strength than the NR latex adhesive. For the graft copolymers, the NR‐g‐P(AAEM‐co‐MMA) adhesive exhibited much higher lap shear strength than the NR‐g‐PAAEM adhesive. This indicates that the incorporation of PMMA chains into the NR‐g‐PAAEM molecules significantly increased the cohesive strength of the resulting adhesive, which is probably due to increased modulus and hardness of the adhesive film. POLYM. ENG. SCI., 58:1610–1618, 2018. © 2017 Society of Plastics Engineers

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Surface modification of polymers and practical adhesion

Cited by 29 publications

References 63 publications

Fundamental studies on lignocellulose/polypropylene composites: Effects of wood treatment on the transcrystalline morphology and mechanical properties

Fundamental studies on lignocellulose/polypropylene composites: Effects of wood treatment on the transcrystalline morphology and mechanical properties

Fabrication of biomimetic gecko toe pads and their characterization

Synthesis of modified Natural Rubber with grafted poly(acetoacetoxyethyl methacrylate‐co‐methyl methacrylate) and performance of derived adhesives with GTA crosslinker

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