Size effect on mechanical properties of micron-sized PS–DVB polymer particles

He, Jianying; Zhang, Z.L.; Midttun, M.; Fonnum, Geir; Modahl, Grete; Kristiansen, Helge; Redford, Keith

doi:10.1016/j.polymer.2008.07.015

Cited by 52 publications

(47 citation statements)

References 35 publications

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“…For each set of experimental conditions, flat punch test was replicated on different single particles in order to check the repeatability of the results. It has previously been shown that the polymer particles from the same manufacturing batch display remarkably consistent behaviour [8,9]. This indicates a homogeneous material microstructure and a uniform particle size, as well as highly reproducible test setup.…”

Section: Methodsmentioning

confidence: 57%

“…The Ni/Au coating with the Ni inner layer of about 50 nm thick and the Au outer layer of about 30 nm was deposited on the acrylic particle surface through an electroless plating process. The dispersion process previously established for polymer particles was used to obtain isolated particles [9]. Based on a nanoindentation device (TriboIndenter ® , Hysitron Inc., MN, USA), the compression test was performed by using a diamond flat punch of 100 !m in diameter rather than a sharp tip commonly used for nanohardness measurement [16,17].…”

Section: Methodsmentioning

confidence: 99%

“…However, mechanical characterization of single micronsized particles has to cope with the challenges of small volume, spherical geometry, composite structure and large deformation. A nanoindentationbased flat punch method has been developed to measure mechanical properties of single micronsized polymer particles by the authors [8][9][10][11]. In a previous study, we have identified a three-stage deformation process of single Ni/Au coated acrylic particles under compression [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Loading rate effects on the fracture of Ni/Au nano-coated acrylic particles

He¹,

Nagao²,

Kristiansen³

et al. 2012

Express Polym. Lett.

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Abstract. Mechanical failure of monodisperse Ni/Au coated acrylic particles has been investigated by individual compression tests using nanoindentation-based technique equipped with a flat diamond punch. We have found that both fracture property and morphology of particles depend on the compression loading rate. The breaking strain of the metal coating decreases with increasing loading rate, while the breaking stress increases. Two obvious fracture patterns with cracking in meridian or latitude direction are identified according to the loading rate, and attributed respectively to tension-or bendingdominated deformation of the coating. The findings reported here give a significant guiding to the manufacture design of metal coated polymer particles for Anisotropic Conductive Adhesive (ACA) packaging.

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Section: Methodsmentioning

confidence: 57%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Loading rate effects on the fracture of Ni/Au nano-coated acrylic particles

He¹,

Nagao²,

Kristiansen³

et al. 2012

Express Polym. Lett.

Self Cite

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show abstract

“…Another common way to analyze mechanical strength of particles with sizes down to 2 µm in diameter is via compressing a single particle between two plates and measuring the deformation [294][295][296][297] by several ways such as microscopy [298] or weighing [299]. This technique is more suitable for monodisperse spherical particles since the measurement is generally performed on a single particle.…”

Section: Mechanical Strengthmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

446

309

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“…6 Mechanical characterization of individual polymer particles and MPS have been performed by He et al using a custom nanoindentation set-up with a flat punch. 7 The influence of factors such as particle size, 8 polymer cross-linking density, 9 loading rate, 10 and chemical composition on the mechanical behavior has been quantified. Furthermore, the fracture behavior of MPS has been studied.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical characterization of individual micron-sized metal coated polymer particles

Bazilchuk

Pettersen

et al. 2016

Journal of Applied Physics

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Micron-sized polymer particles with nanoscale metal coatings are essential in conductive adhesives for electronics assembly. The particles function in a compressed state in the adhesives. The link between mechanical properties and electrical conductivity is thus of the utmost importance in the formation of good electrical contact. A custom flat punch set-up based on nanoindentation has been developed to simultaneously deform and electrically probe individual particles. The set-up has a sufficiently low internal resistance to allow the measurement of sub-Ohm contact resistances. Additionally, the set-up can capture mechanical failure of the particles. Combining this data yields a fundamental understanding of contact behavior. We demonstrate that this method can clearly distinguish between particles of different sizes, with different thicknesses of metal coating, and different metallization schemes. The technique provides good repeatability and physical insight into the behavior of these particles that can guide adhesive design and the optimization of bonding processes.

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Size effect on mechanical properties of micron-sized PS–DVB polymer particles

Cited by 52 publications

References 35 publications

Loading rate effects on the fracture of Ni/Au nano-coated acrylic particles

Loading rate effects on the fracture of Ni/Au nano-coated acrylic particles

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Electromechanical characterization of individual micron-sized metal coated polymer particles

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