Abstract
As a followup to previous work, experiments with argon and oxygen Radio Frequency plasma treated polyethylene terepthalate (PET) exposed to 100 °C after cold plasma treatment were performed. Tensile tests results in monofilaments treated in oxygen and argon plasma for 5 s, 20 s, 30 s, and 100 s showed a decrease in the average tensile strength compared with the untreated fibers. It was also observed that the reduction in mechanical strength is more significant for argon plasma and very sensitive to the treatment time for oxygen plasma. Experimental data obtained from tensile tests in samples thermal exposed to 100 °C after plasma treatments indicate the same influence of treatment times on mechanical strength, as observed for cold plasma treated fibers. Furthermore, an increase in tensile strength when compared with the samples unexposed to 100 °C was observed. Scanning electron microscopy, used to analyze effects of cold plasma treatment on fibers surfaces, indicates differences in roughness profiles depending on the type of treatment. The distance of roughness interval, Dri, was a parameter introduced to relate the fibers surface condition and average tensile strength. Statistical analysis of experimental data was performed to explain influences of treatment time, and environmental and temperature effects on mechanical properties.
Similar content being viewed by others
References
S. Weidner, G. Kühn, R. Decker, D. Roessner, and J. Friedrich: “Influence of Plasma Treatment on the Molar Mass of Poly(Ethylene Terephtalate) Investigate by Different Chromatographic and Spectroscopy Methods,” J. Appl. Polym. Sci.: Part A: Polym. Chem., 1998, 36, pp. 1639–48.
S.A.C. Gould, D.A. Schiraldi, and M.L. Occelli: “Analysis of Poly(ethylene terephthalate) (PET) Films by Atomic Force Microscopy,” J. Appl. Polym. Sci., 1998, 67(7), pp. 1237–43.
P.J. Herrera-Franco and L.T. Drzal: “Comparison of Methods for the Measurement,” Composites, 1992, 23(1), pp. 2–27.
A. Teishevand and A. Maron: “The Effect of Transcrystallinity on the Transverse Mechanical Properties of Single-Polymer Polyethylene Composites,” J. Appl. Polym. Sci., 1995, 56, pp. 959–66.
K.A. Kodokian and A.J. Kinloch: “Surface Pretreatment and Adhesion of Thermoplastics Fibre Composites,” J. Mater. Sci., 1988, 7, pp. 625–27.
L.Y. Yuan, S.S. Shyu, and J.Y. Lai: “Plasma Surface Treatment of Carbon Fibers. Part 2: Interfacial Adhesion With Poly (Phenylene Sulfide),” Comp. Sci. Technol., 1992, 45, pp. 9–16.
G. Kill, D.H. Hunter, and N.S. McIntyre: “Reactions of Polyethylene Surface With the Downstream Products of an Air Plasma: Gas Phase and Surface Spectroscopic Studies,” J. Polym. Sci.: Part A Polym. Chem., 1996, 34, pp. 2299–310.
N.K Anifantis, P.A. Kakavas, and G.C. Papanicolaou: “Thermal Concentration Due to Imperfect Adhesion in Fiber-Reinforced Composites,” Comp. Sci. Technol., 1997, 57, pp. 687–96.
W.G. Pitt, J.E. Lakenan, and A.B. Strong: “The Influence of Plasma Gas Species on the Adhesion of Thermoplastic to Organic Fibers,” J. Appl. Polym. Sci., 1993, 48, pp. 845–56.
B.R.K. Blackman, A.J. Kinloch, and J.F. Watts: “The Plasma Treatment of Thermoplastics Fibre Composites for Adhesive Bonding,” Composites, 1994, 25(5), pp. 332–41.
B.Z. Jang: “Control of Interfacial Adhesion in Continuous Carbon and Kevlar Fiber Reinforced Polymer Composites,” Comp. Sci. Technol., 1992, 44, pp. 333–49.
S. Gao and Y. Zeng: “Surface Modification of Ultrahigh Molecular Weight Polyethylene Fibers by Plasma Treatment,” J. Appl. Polym. Sci., 1993, 47, pp. 2065–71.
D. Ferrante, S. Iannace, and T. Monetta: “Mechanical Strength of Cold Plasma PET Fibers,” J. Mater. Sci., 1998, 33, pp. 1–5.
B. Chapman: “Glow Discharge Processes—Sputtering and Plasma Etching,” John Wiley & Sons, New York, NY, 1980, pp. 177–343.
E. Occhiello, M. Morra, G.L. Guerrini, and F. Garbassi: “Adhesion Properties of Plasma-Treated Carbon/PEEK Composites,” Composites, 1992, 23(3), pp. 193–200.
M.O.H. Cioffi, H.J.C. Voorwald, V. Ambrogi, T. Monetta, F. Bellucci, and L. Nicolais: “Tensile Strength of Radio Frequency Cold Plasma Treated PET Fibers. Part I: Influence of Environment and Treatment Time,” J. Mater. Eng. Perf., 2002, 11(6), pp. 659–66.
T. Tanaka, H. Nakayama, A. Sakaida, and T. Imamichi: “Evaluation of Weibull Parameters for Static Strengths of Ceramics by Monte Carlo Simulation,” Mater. Sci. Res. Int., 1995, 1(1), pp. 51–58.
C. Lipson and N.J. Sheth: “Statistical Distribution” in Statistical Design and Analysis of Engineering Experiments, McGraw Hill, NY, 1973, pp. 36–45.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cioffi, M.O.H., Voorwald, H.J.C., Ambrogi, V. et al. Mechanical strength of PET fibers treated in cold plasma and thermal exposed. J. of Materi Eng and Perform 12, 279–287 (2003). https://doi.org/10.1361/105994903770343123
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1361/105994903770343123