Temperature dependent elastic–plastic behaviour of polystyrene studied using AFM force–distance curves

Kaliappan, Senthil Kumar; Cappella, Brunero

doi:10.1016/j.polymer.2005.09.066

Cited by 49 publications

(52 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The elastic moduli of PnBMA and PS measured in this experiment are larger than 1 GPa and 3 GPa, i.e., the values previously found by Cappella et al for bulk polymers [17,18,20], but are in agreement with the measured values of thin films of PnBMA [19,37,38]. Such larger Young's moduli are comprehensible, when the sample preparation and the constraints of the polymers are accounted for.…”

Section: Resultssupporting

confidence: 91%

See 1 more Smart Citation

Mechanical Properties and Adhesion of a Micro Structured Polymer Blend

Cappella

2011

Polymers

Self Cite

View full text Add to dashboard Cite

Abstract:A 50:50 blend of polystyrene (PS) and poly(n-butyl methacrylate) (PnBMA) has been characterized with an Atomic Force Microscope (AFM) in Tapping Mode and with force-distance curves. The polymer solution has been spin-coated on a glass slide. PnBMA builds a uniform film on the glass substrate with a thickness of ≅200 nm. On top of it, the PS builds an approximately 100 nm thick film. The PS-film undergoes dewetting, leading to the formation of holes surrounded by about 2 µm large rims. In those regions of the sample, where the distance between the holes is larger than about 4 µm, light depressions in the PS film can be observed. Topography, dissipated energy, adhesion, stiffness and elastic modulus have been measured on these three regions (PnBMA, PS in the rims and PS in the depressions). The two polymers can be distinguished in all images, since PnBMA has a higher adhesion and a smaller stiffness than PS, and hence a higher dissipated energy. Moreover, the polystyrene in the depressions shows a very high adhesion (approximately as high as PnBMA) and its stiffness is intermediate between that of PnBMA and that of PS in the rims. This is attributed to higher mobility of the PS chains in the depressions, which are precursors of new holes.

show abstract

Section: Resultssupporting

confidence: 91%

“…The mechanical behavior of PnBMA, both in bulk [17,18] and as thin or ultrathin films [19], and of PS [18,20] is well known and was examined in detail by means of force-displacement curves in our previous experiments.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties and Adhesion of a Micro Structured Polymer Blend

Cappella

2011

Polymers

Self Cite

View full text Add to dashboard Cite

show abstract

“…Further, as the cantilever probe assembly can be treated as a spring, it can be used to measure surface stiffness and adhesive properties. Previous studies have explored the visco-elastic and nano-mechanical properties of polymer films (Bliznyuk et al, 2002;Cappella et al, 2005;Kaliappan and Cappella, 2005;Torres et al, 2009;Tsui et al, 2000;Yang et al, 2006), polymer electrospun fibres (Wang and Barber, 2012) and rubber (Tranchida et al, 2009) using AFM with increasing temperature. However, AFM based nanoindentation analysis on polymeric materials can become problematic * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Nano-scale temperature dependent visco-elastic properties of polyethylene terephthalate (PET) using atomic force microscope (AFM)

Grant

Alfouzan

Gough

et al. 2013

Micron

View full text Add to dashboard Cite

“…However, the situation changes above the T g . There, due to significant decrease of the Young modulus of the amorphous polymers above the T g [24], the length scale associated with plastic polymer deformations and a viscous matter transport around the wearing scar become comparable with the spacing between windings used in our experiment. Then, our model is expected to break down, and the correlation coefficients are expected to drop.…”

Section: Resultsmentioning

confidence: 68%