Nanomechanical and surface frictional characteristics of a copolymer based on benzoyl-1,4-phenylene and 1,3-phenylene

Morgan, Sarah E.; Misra, Rahul; Jones, Paul

doi:10.1016/j.polymer.2006.02.025

Cited by 23 publications

(13 citation statements)

References 26 publications

(34 reference statements)

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“…Therefore, it is necessary to find a new testing method that can more conveniently and accurately measure the mechanical properties of the small scale samples of insects such as the cells on the dragonfly wings. The nanoindentation technique is considered as an excellent tool for the study of the mechanical behavior of thin membranes, in particular, when simple tensile tests are very small and difficult to perform [9][10][11][12]. The development of the nanoindentation technique has allowed highly localized hardness and modulus measurements to be performed on very small material volumes.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and nanomechanical properties of the wing membrane of dragonfly

Song

Xiao

Bai

et al. 2007

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Microstructure and nanomechanical properties of the wing membrane of dragonfly

Song

Xiao

Bai

et al. 2007

Materials Science and Engineering: A

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“…However, despite low coefficient of friction and non-sticking properties, the wear resistance achieved by these monomolecular layers is not sufficient to provide long life to the high velocity moving MEMS components [1]. Further, researchers have recently identified that polymer films coated onto Si surface show good improvement in wear durability and friction reduction behavior [6,[10][11][12]. Sidorenko et al [10] have shown that a tri-layer architecture, consisting of poly (meth) acrylate layer on SEBS (poly[styrene-b-(ethylene-co-butylene)-bstyrene]) polymer chemisorbed onto Si via 3-glycidoxypropyltrimethoxysilane SAM, has shown good wear durability characteristics.…”

Section: Introductionmentioning

confidence: 99%

Effect of Molecular Structure on Friction and Wear of Polymer Thin Films Deposited on Si Surface

2007

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In this study, the influence of the molecular structure (linear or with bulky side groups) of polymer films covalently attached to Si surface on tribological properties is investigated. Two polymers, PE (polyethylene) and PS (polystyrene), are selected where PE has simple linear molecular structure whereas PS has linear molecular structure but contains bulky benzene groups located at the sides of the linear chain. PE and PS molecules, both with reactive maleic anhydride groups, are chemisorbed onto Si via an intermediate APTMS SAM (3-aminopropyltrimethoxysilane self-assembled monolayer). Water contact angle measurements, AFM (atomic force microscopy), ellipsometry, and XPS (X-ray photoelectron spectroscopy) are used to identify and characterize the polymer films. Tribological properties are studied using a microtribometer where a 4 mm diameter Si 3 N 4 ball is used as the counterface. Among the two polymer films investigated, Si/APTMS/PE has shown very low coefficient of friction (0.08) and high wear life (~4,400 cycles) than those of Si/APTMS/PS. Surprisingly, Si/APTMS/PS did not show any improvement in tribological properties when compared to that of bare Si. The present study proves that the polymer with linear molecular structure without the bulky side groups show good tribological properties even when it is coated as a thin film and hence such polymers can be used as thin-films for reducing friction and wear of substrates such as Si or other materials.

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“…Poly(para-phenylenes) (PPPs) consist of directly linked repeating phenyl units (benzene rings) resulting in strength and stiffness values much greater than other traditional polymeric biomaterials (Morgan et al, 2006;Pei and Friedrich, 2012;Vuorinen et al, 2008). A recent approach in the polymerization of PPPs has been to add side groups to the aromatic backbone, which allows for increased degree of polymerization (Taylor and Samulski, 2000;Percec et al, 1999;Cianga et al, 2002).…”

Section: Introductionmentioning

confidence: 99%