Multiscale thermal study of virgin and aged polyphenylene sulfide reinforced by glass fiber

Abstract

In this study, virgin and thermal aged PPS samples were prepared and tested using different techniques such as thermogravimetric analysis (TGA), coupled TGA-Fourier transform infrared spectroscopy (FTIR), and FTIR as well as optical microscopy. Some interesting research results can be summarized as follows: TGA results prove the PPS composite samples aged at 180 and 200 C have been degraded obviously during the aging period in oven. Moreover, accelerated aging leads to the degradation of PPS composite with the observation of increased thermal oxidation layer from outside to inside. There is a plateau standing at about 350 μm for the thermal oxidation layer at oxidation temperature of 200 C. Some thermal decomposition models are applied to clarify the degradation kinetics of PPS composite. According to the activation energy value, it appears degradation more easily at the beginning of the heating process in the atmosphere of oxygen than that of nitrogen. Moreover, the related products of PPS composites during pyrolysis are fully discussed with the combined analysis of TGA-FTIR techniques.

Thermal aging performance of glass fiber/polyphenylene sulfide composites in high temperature

“…However, the smooth surface of glass fibers is observed in GF/PPS composites aged for above 168 h. It indicates that there are obvious separation between fiber and matrix in the GF/PPS composites aged for long time in high temperature. Therefore, the reduction of tensile strength of aged GF/PPS composites is attributed to the decreased interfacial adhesion between resin matrix and glass fiber due to the degradation of PPS resin 60–63,65,66 …”

“…However, there are few literatures discussing about the effect of long time in high temperature on the physical, thermal, and mechanical properties of GF/PPS composites. Zuo et al 60–63 systematically investigated the physical, thermal, and mechanical properties of thermally aged GF/PPS composites and observed the obvious degradation of PPS composites aged at 180 and 200°C and the increase in thermal oxidation layer from outside to inside during the aging period in oven. The results of isothermal and non‐isothermal crystallization behaviors and dynamic mechanical properties of thermal aged GF/PPS composites indicated that the thermal aging has an obvious effect on crystallization behaviors of PPS composites.…”

Effect of Thermal Aging on Mechanical Properties and Color Difference of Glass Fiber/Polyetherimide (GF/PEI) Composites

“…In service, failures of glass–fiber-reinforced polymeric composites are commonly attributed to aging of the material in its particular environment, brought about by a combination of the effects of heat, water, and mechanical stresses on the material. Several studies have shown the important effects of absorbed water and aging temperature on the physical and mechanical properties of composite materials [ 20 , 21 , 22 , 23 , 24 , 25 ].…”

Experimental investigation and optimization of printing parameters of 3D printed polyphenylene sulfide through response surface methodology

“…Polyphenylene sulfide (PPS) is one among the HPT material that offers many outstanding properties as well as poly‐ether‐ether‐ketone (PEEK), including superior thermal stability, high mechanical strength, and chemical resistance. [ 10–15 ]…”

“…Polyphenylene sulfide (PPS) is one among the HPT material that offers many outstanding properties as well as poly-ether-etherketone (PEEK), including superior thermal stability, high mechanical strength, and chemical resistance. [10][11][12][13][14][15] During 3D printing, multiple controllable parameters, such as raster angle, infill, and layer thickness, are accounted to produce highly qualified material parts. Most studies reported that the mechanical properties depend strongly on the choice of printing parameters.…”