Session: 17-01-01: Research Posters

Paper Number: 150725

150725 - Characterization of Carbon Fiber Reinforced Polyphenylene Sulfide (Cf/pps) Composites. 

This research focuses on characterizing Carbon Fiber Reinforced Polyphenylene Sulfide (CF/PPS) thermoplastic composites, emphasizing their potential for high-performance applications in the aerospace and automotive sectors. The CF/PPS thermoplastic composites were formed using a hot press technique, and the influence of changing processing parameters like temperature, pressure, and duration on the composite's mechanical and thermal properties was studied to determine ideal circumstances that maximize performance. Our findings demonstrate that specific combinations of high temperature and pressure considerably improve the mechanical characteristics of the formed CF/PPS composites. High-temperature processing promotes better interfacial bonding between the carbon fibers and the PPS matrix, while elevated pressure ensures more efficient fiber impregnation and reduced void content. The optimal hot press conditions identified in our study resulted in composites exhibiting superior tensile strength, flexural strength, and impact resistance compared to those processed under suboptimal conditions.

X-ray diffraction (XRD) examination played a crucial role in elucidating the structural enhancements achieved under these optimal conditions. The XRD analysis revealed higher crystallinity within the PPS matrix, indicating more orderly and tightly packed polymer chains. This increased crystallinity aligns with the observed improvements in mechanical properties, as a more crystalline matrix provides better load transfer and overall stiffness to the composite. Furthermore, phase analysis corroborated these findings, showing the formation of a more homogenous and stable composite structure, which is critical for maintaining consistent performance under mechanical stress.Microstructural analysis utilizing Scanning Electron Microscopy (SEM) provided vital insights into the internal structure of the composites. SEM images of the optimized samples revealed greater fiber dispersion and enhanced fiber-matrix adhesion. This improved adhesion is attributed to the optimal processing conditions, which facilitate better wetting of the fibers by the molten PPS. Additionally, the SEM analysis indicated a notable reduction in void content, which is often a critical factor in determining the mechanical performance of composite materials. The presence of voids can act as stress concentrators, leading to premature failure; hence, their minimization is crucial.

The significance of careful control over hot press conditions cannot be overstated. By fine-tuning the processing parameters, we can efficiently tailor the characteristics of CF/PPS composites to meet specific performance requirements. The significant gains in mechanical and thermal properties achieved through optimization underscore the promise of these composites for applications in challenging environments. In high-speed aerospace contexts, where materials are subjected to extreme mechanical loads and temperature variations, the enhanced properties of optimized CF/PPS composites can lead to increased safety and performance. Similarly, in the rugged automotive sector, these composites can offer improved durability and fuel efficiency due to their lightweight and high-strength nature.

The present work enhances the understanding of CF/PPS composite behavior under diverse processing circumstances and establishes the framework for future developments in high-performance composite materials. This study not only identifies the critical processing parameters but also highlights the potential of CF/PPS composites in advancing the capabilities of aerospace and automotive applications.

Keywords: hot-press, thermoplastic, crystallinity, adhesion.

Presenting Author: Nitin More North Carolina Agricultural And Technical State University

Presenting Author Biography: I Nitin More third year graduate student pursuing PHD. in Nanoengineering in Joint School of Nanoscience & Nanoengineering. My research interest includes thermoplastic composites & design manufacturing. I have completed my master's in design engineering & bachelor's in mechanical engineering. I have hands on experience on characterization tools like Scanning Electron Microscope, Nikon X-Ray CT scan, KLA Zeta Optical Profiler & XRD. I am deterministic, dedicated & hardworking student.

Authors:

Nitin More North Carolina Agricultural And Technical State University
Ram Mohan North Carolina Agricultural And Technical State University