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SEMI-CONTINUOUS PLASMA POLYMERIZATION OF A FILM TO ENHANCE THE TEXTURE PROPERTIES OF AN ELASTOMER

CHASE, JENNIFER E.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin975349091

Abstract Details

2000, MS, University of Cincinnati, Engineering : Materials Science.
The texture of a styrene butadiene rubber (SBR) film was enhanced by the deposition of a plasma-polymerized, siloxane-like coating. This improvement in texture was quantified as a reduction in the coefficient of friction of the SBR film, from approximately 1.2 for the uncoated material to 0.3 for the coated material. The adhesional forces in the elastomer that result in SBR film having a high coefficient of friction were masked upon the application of the coating. However, the desirable bulk properties of the elastomer such as the extensibility and modulus were retained. A dual-mode reactor, in which both low frequency (LF) and microwave (MW) power were applied to the plasma, was used to yield a deposition rate of approximately 280 nm min-1. During deposition, carrier gases (Ar and O2) were flowed through the reactor, along with the monomer (hexamethyldisiloxane, HMDSO). Batch depositions were performed to determine the reactor parameters that yielded the maximum deposition rate and the minimum coefficient of friction. Semi-continuous depositions were also performed by inserting an unwind and rewind mechanism into the reactor to produce a moving web that simulated an industrial coating process. The molecular structure of the deposited films was determined using attenuated total reflectance (ATR) infrared spectroscopy and found to consist of mainly Si-O-Si and Si-CH3 groups. The thicknesses of the films, and hence the deposition rates, were determined by variable angle spectroscopic ellipsometry (VASE). The coefficient of friction values for the films were determined by tribometry. A film thickness of approximately 100 nm usually resulted in a reduction in coefficient of friction of the SBR material to approximately 0.30. The SBR film was extremely sensitive to increases in the temperature of the LF electrode, due to the applied LF power. However, when the LF power was reduced to 15 W and the MW power was increased to 500 W, the SBR film was processed for a semi-continuous deposition lasting approximately 15 min. Approximately 10 ft of coated material with a low coefficient of friction were produced prior to the web failing due to heating. For the continuous processing of SBR film, the heating of the LF electrode must be controlled.
F. James Boerio (Advisor)
1 p.
Engineering, Materials Science
thin film; surface engineering

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Citations

  • CHASE, J. E. (2000). SEMI-CONTINUOUS PLASMA POLYMERIZATION OF A FILM TO ENHANCE THE TEXTURE PROPERTIES OF AN ELASTOMER [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin975349091

    APA Style (7th edition)

  • CHASE, JENNIFER. SEMI-CONTINUOUS PLASMA POLYMERIZATION OF A FILM TO ENHANCE THE TEXTURE PROPERTIES OF AN ELASTOMER. 2000. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin975349091.

    MLA Style (8th edition)

  • CHASE, JENNIFER. "SEMI-CONTINUOUS PLASMA POLYMERIZATION OF A FILM TO ENHANCE THE TEXTURE PROPERTIES OF AN ELASTOMER." Master's thesis, University of Cincinnati, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin975349091

    Chicago Manual of Style (17th edition)

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