Fluoropolymer addition to an epoxy: phase inversion and tribological properties

Brostow, Witold; Cassidy, Patrick E.; Hagg, Haley E.; Jaklewicz, Magdalena; Montemartini, Pablo E.

doi:10.1016/s0032-3861(01)00281-6

Cited by 45 publications

(35 citation statements)

References 9 publications

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“…In the usual friction tests, such as we performed in our earlier work, 30 there is an interaction between flat surfaces. Tribological techniques include scratch resistance determination, 31 sliding wear, 32−34 and the surface evaluation techniques such as SEM analyzed in detail by Michler 21 as well as atomic force microscopy used among others by us.…”

Section: Discussionmentioning

confidence: 95%

Polymer tribology in safety medical devices: Retractable syringes

2007

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ABSTRACT:We analyze an example of the application of polymer tribology to create a safety medical device, namely a retractable syringe. In service at various stages either low-or high-dynamic friction is needed. Our work focuses on a VanishPoint ® nonreusable safety syringe manufactured by Retractable Technologies, Inc., Little Elm, TX. Different medical-grade materials strongly affect the performance of this product. Extant tribological testing methods developed for flat surfaces are of little use. A functionality test that provides static and dynamic friction between rounded and cylindrical parts moving one inside the other gives us data not obtainable from the earlier techniques. These results combined with the liquid blowout force results (also for cylindrical surfaces) tell us that a polyolefin elastomer imparts better properties to a polypropylenecontaining resin than does silica as an additive. Data-based selection of appropriate polymeric materials for components of the syringe thus becomes possible.

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Section: Discussionmentioning

confidence: 95%

Polymer tribology in safety medical devices: Retractable syringes

2007

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“…Silica [22], alumina [23], and silicon nitride [24] nano particles have all been incorporated into epoxies with most additions improving both the coefficient of friction and wear resistance. There is also work that has incorporated fluorinated polyaryletherketone into epoxy to create a polymer/ epoxy blend that, in the main, shows roughly 20% reductions in friction coefficient [25]. As mentioned above, PTFE has also been used as filler in epoxy matrixes.…”

Section: Introductionmentioning

confidence: 99%

Wear resistant solid lubricant coating made from PTFE and epoxy

et al. 2005

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A composite coating of polytetrafluoroethylene and epoxy shows 100 · improvements in wear resistance as compared to either of its constituents alone and reduced friction coefficient under testing on a pin-on-disk tribometer. This coating is made by impregnating an expanded PTFE film with epoxy, which provides three unique functions: (1) the epoxy compartmentalizes the PTFE nodes, which is believed to reduce the wear of the PTFE, (2) the epoxy increases the mechanical properties such as elastic modulus and hardness, and (3) the epoxy provides a ready interface to bond the films onto a wide variety of substrates easily and securely. The experimental matrix had normal loads of 1-3 N, sliding speeds from 0.25 to 2.5 m/s, and used a 2.4 mm radius low carbon steel pin in a rotating pin-on-disk tribometer. The skived PTFE films had wear rates on the order of K ¼ 10 )3 mm 3 /Nm and friction coefficients around l ¼ 0.2. Both the high density films (70 wt%PTFE) and low density films (50 wt% PTFE) had wear rates on the order of K ¼ 10 )6 mm 3 /Nm and friction coefficients around l ¼ 0.15. The neat epoxy films showed significant scatter in the tribological measurements with wear-rates on the order of K ¼ 10 )4 mm 3 /Nm and friction coefficients around l ¼ 0.40. The enhanced tribological behavior of these composites is believed to stem from the coatings ability to draw thin PTFE transfer films into the contact from the nodes of PTFE, which act like reservoirs. Nanoindentation mapping of the coatings and the transfer films supports this hypothesis, and accompanies scanning electron microscopy observations of the worn and unworn coatings.

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“…Consequently, fluoropolymers have wide applications in modern technologies ranging from building, automotive and aerospace industries to optics and microelectronics [4][5][6]. In several areas of surface coatings technology, such as antifouling and easily cleaned coatings addition, fluoropolymers have attracted a great deal of attention of researchers [7][8][9][10]. However, the relatively high market prices of such materials restrict their applications to areas where such properties are essential and a comparable performance cannot be achieved using less expensive polymers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and surface properties of semi-interpenetrating fluorine-containing polyacrylate and epoxy resin networks

et al. 2012

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Semi-interpenetrating polymer networks (SemiIPNs) based on fluorine-containing polyacrylate and epoxy resin were synthesized by the simultaneous polymerization of fluorine-containing acrylate and epoxy resin. Fourier transform infrared (FTIR) spectrometry and X-ray photoelectron spectroscopy (XPS) analyses proved that the fluorine-containing groups have been introduced into Semi-IPNs successfully. In addition, XPS analysis intuitively showed that the fluorine content of the film-air interface of the interpenetrating fluorine-containing polyacrylate and epoxy resin networks (FPAER-SIPNs) film was much higher than that of the film-glass interface. It is noted that the introduction of fluorine-containing groups significantly improved the hydrophobic property of polymer networks. Moreover, when the fluorine content increased, the contact angle of water on FPAER-SIPNs film was increased obviously and the water uptake was decreased gradually. These results indicated that introducing fluorine-containing groups to SIPNs has potential advantage for improving the surface properties of epoxy resin.

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Fluoropolymer addition to an epoxy: phase inversion and tribological properties

Cited by 45 publications

References 9 publications

Polymer tribology in safety medical devices: Retractable syringes

Polymer tribology in safety medical devices: Retractable syringes

Wear resistant solid lubricant coating made from PTFE and epoxy

Synthesis and surface properties of semi-interpenetrating fluorine-containing polyacrylate and epoxy resin networks

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