Environmental Nanomechanical Testing of Polymers and Nanocomposites

Chen, Jian; Beake, Ben D.; Dong, Hanshan; Bell, G. A.

doi:10.1007/978-94-007-6919-9_4

Cited by 4 publications

(2 citation statements)

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“…Most of the elastic and plastic deformation during indentation is limited to the vicinity of the indenter and so any large-scale bending or compression of the specimen can be ignored [59,60]. The maximum indentation depth was less than $1100 nm, which was less than 2% of the thickness of the films so any influence of the substrate is minimal.…”

Section: Influence Of Dehydration On Surface Mechanical Propertiesmentioning

confidence: 99%

The influence of dehydration on the interfacial bonding, microstructure and mechanical properties of poly(vinyl alcohol)/graphene oxide nanocomposites

Chen

Gao

Liu

et al. 2015

Carbon

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Section: Influence Of Dehydration On Surface Mechanical Propertiesmentioning

confidence: 99%

The influence of dehydration on the interfacial bonding, microstructure and mechanical properties of poly(vinyl alcohol)/graphene oxide nanocomposites

Chen

Gao

Liu

et al. 2015

Carbon

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“…One of the merits of this technique is that it allows the application of very low loads (ranging from nN to μN) to the sample and measures the small displacements. This technique is very powerful in the sense that it allows one to obtain information on localized material properties and map the mechanical properties with a very high spatial resolution . NI scores over bulk mechanical characterization techniques, since hardness evaluated from NI is much more sensitive to the surface features of the materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Microstructure on the Nanomechanical Properties of Polymorphic Phases of Poly(vinylidene fluoride)

et al. 2018

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Poly(vinylidine fluoride) (PVDF) is a semicrystalline polymer which is known to exist in several polymorphic phases, namely, α, β, and γ. Each one of these polymorphic phases is characterized by unique features such as spherulite formation in the case of the α and γ phases and the presence of large piezoelectric and ferroelectric activity in the β phase. Despite being widely used as thin coatings in sensors, lack of reports on nanomechanical properties suggests that investigation of mechanical properties of PVDF, let alone those of its polymorphic phases, seems to have evaded the sight of the research community. Herein, we report the nanomechanical properties of the α, β, and γ phases of PVDF. The modulus and hardness values were evaluated from nanoindentation experiments; it was found that the electroactive β phase is the softest among the three polymorphic phases. This result was further confirmed by scratch experiments. We have attempted to establish a correlation between the microstructure and nanomechanical properties of these phases. This work sheds light on the mechanisms responsible for the observed mechanical behavior and the role of tie molecules and amorphous content in providing flexibility to the polymer.

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