Effect of air plasma treatment on the mechanical properties of polyphenylene sulfide/glass fiber cloth composites

Abstract

In this research study, air plasma-treated polyphenylene sulfide film was used to prepare polyphenylene sulfide/glass fiber cloth composites for improving interfacial adhesion and mechanical properties. The effect of air plasma treatment on the properties of polyphenylene sulfide films was investigated by X-ray photoelectron spectroscopy and water contact angle analysis. According to the X-ray photoelectron spectroscopy analysis, it was found that plasma treatment led to the emergence of oxygen-containing polar groups on the film surface. The intensity of sulfide oxides (S = O and O = S = O) on the surface of polyphenylene sulfide films increased to 79.03% after it was modified by air plasma. Water droplet contact angle analysis indicated that plasma treatment significantly increased the hydrophilicity of the polyphenylene sulfide film. The contact angle was 38 degrees for plasma-treated polyphenylene sulfide film, compared to 78.5 degrees for untreated polyphenylene sulfide film. Tensile strength and notched impact strength of plasma-treated polyphenylene sulfide/glass fiber cloth (50/50) composite increased by 11% (from 248.49 MPa to 275.70 MPa) and 18% (from 52.26 KJ/m2 to 61.43 KJ/m2), respectively, compared with the raw specimen, which was consistent with the morphology analysis result. Meanwhile, the mechanical properties of the composites were improved with the increased discharge power density and treatment time.

Effect of air dielectric barrier discharge plasma treatment on the adhesion property of sanded polyphenylene sulfide

“…The atomic percentages of C, S, O, and N on the PPS film surface are shown in Table 1. A small amount of oxygen was detected due to the inherent oxidation 16 or absorbed water 33 on the untreated PPS surface. The concentrations of C, S, O, and N were 89.41%, 6.78%, 3.81%, and 0%, respectively (Table 1).…”

“…Physical surface modification is more suitable for surface treatment of polymeric materials than chemical modification due to its advantages such as high efficiency and low environmental impact. 16 Plasma treatment has attracted more and more interest in the field of polymer surface modification. The most important merit of plasma treatment is that it is confined only to the surface of the materials without interfering with their bulk properties.…”

“…The most important merit of plasma treatment is that it is confined only to the surface of the materials without interfering with their bulk properties. 14,16,17 Also this surface treatment can induce the formation of various organic functional groups by using different carrier gases. [18][19][20][21][22] In GA Wade et al's research, 23 unidirectional glass fiber-reinforced plastic nylon 6,6 thermoplastic composites were treated in argon (Ar), oxygen (O 2 ), nitrogen (N 2 ), or ammonia (NH 3 ) plasma, respectively, for improving the surface adhesion with epoxy adhesive.…”

“…24,25 As an alternative to traditional low-pressure plasma treatments, the atmospheric pressure discharge, dielectric barrier discharge (DBD) plasma treatment, has been developed to operate near ambient temperature and atmospheric pressure, which could eliminate the expense of vacuum system. 16,24 Besides, compared with enclosed plasma system using other types of carrier gases, this open air-type plasma technique reduces the cost associated with carrier gas and makes the treatment of large objects and continuous production line feasible. 26 Up to now, only a few research studies focus on the influence of air DBD plasma treatment to improve the adhesion strength of PPS.…”

Thermally stable and high impact toughness chopped PI fiber-reinforced PEEK composites

“…With the rapid development of the aerospace industry, special engineering plastics have attracted increasing research interest due to their low densities, high specific strengths and moduli, and other excellent features compared to metals. These special engineering plastics mainly include polyether ether ketone (PEEK), polyphenylene sulfide, 1 –4 polyethersulfone, 5–6 polyetherimide, 7 –9 and polyphenylene sulfone. 10 –12 Among them, PEEK, a type of semicrystalline thermoplastic, has attracted significant attention over the past few decades because of its high glass transition temperature, excellent heat and radiation resistance, high strength, and high modulus.…”