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Dependence of nanomechanical modification of polymers on plasma-induced cross-linking
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10.1063/1.2402033
/content/aip/journal/jap/101/1/10.1063/1.2402033
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/1/10.1063/1.2402033
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Tip geometry and pertinent nomenclature, (b) schematic of indentation showing the difference between contact depth and maximum nanoindentation depth , and (c) schematic of nanoscratching showing the average scratch depth .

Image of FIG. 2.
FIG. 2.

Stiffness vs maximum indentation depth of untreated and plasma-treated LDPE for relatively intense and mild plasma conditions and tip radii of (a) and (b) .

Image of FIG. 3.
FIG. 3.

Friction force vs normalized contact radius of untreated and plasma-treated LDPE for relatively intense and mild plasma conditions and tip radii of (a) and (b) .

Image of FIG. 4.
FIG. 4.

Coefficient of friction vs sliding distance of untreated and plasma-treated LDPE for relatively intense and mild plasma conditions and tip radii of (a) and (b) .

Image of FIG. 5.
FIG. 5.

Coefficient of friction vs sample distance from the plasma source and ion energy fluence for tip radii of (◻) and (엯) .

Image of FIG. 6.
FIG. 6.

Coefficient of friction vs average scratch depth of untreated (엯) and plasma-treated LDPE for relatively intense (▵) and mild (◻) plasma conditions and tip radius .

Image of FIG. 7.
FIG. 7.

Surface molecular models of (a) untreated LDPE before scratching, (b) untreated LDPE after scratching, (c) cross-linked LDPE before and after scratching with a blunt tip, and (d) cross-linked LDPE after scratching with a sharp tip. The inset at the bottom of the figure shows a close view of crystalline lamellae. Chain cross-linking in (c) and (d) is denoted by thick solid lines bridging molecular chains in the amorphous phase.

Image of FIG. 8.
FIG. 8.

Surface molecular models of LDPE exposed to relatively (a) intense and (b) mild plasma conditions.

Image of FIG. 9.
FIG. 9.

Coefficient of friction vs average scratch depth of (엯) untreated, (◻) plasma-treated, and (◇) VUV/UV-treated LDPE for tip radius . Both types of treatment were performed under relatively mild plasma conditions .

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/content/aip/journal/jap/101/1/10.1063/1.2402033
2007-01-05
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dependence of nanomechanical modification of polymers on plasma-induced cross-linking
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/1/10.1063/1.2402033
10.1063/1.2402033
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