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Process Optimization for Compression Molding of Carbon Fiber-Reinforced Thermosetting Polymer.
Jiuming Xie1,2,3, Shiyu Wang4, Zhongbao Cui5
1School of Mechanical Engineering, Tianjin University; Tianjin 300072, China. xiejiuming@tsguas.edu.cn.
Materials (Basel, Switzerland)
|August 2, 2019
Summary
Optimizing compression molding of polyacrylonitrile (PAN)-based carbon fiber-reinforced thermosetting polymer (CFRTP) significantly improves mechanical properties. Key parameters like temperature and pressure-holding time are crucial for enhanced tensile, bending, and interlaminar shear strength.
Area of Science:
- Materials Science
- Polymer Engineering
- Composite Materials
Background:
- Carbon fiber-reinforced polymers (CFRPs) are advanced materials with excellent properties.
- Enhancing the mechanical performance of CFRPs is critical for their wider application.
- Polyacrylonitrile (PAN)-based carbon fiber-reinforced thermosetting polymers (CFRTPs) offer a promising route for high-performance composites.
Purpose of the Study:
- To investigate the influence of compression molding parameters on CFRTP mechanical properties.
- To optimize the compression molding process for improved quality and performance of CFRTP workpieces.
- To determine the optimal combination of process parameters for superior mechanical strength.
Main Methods:
- Preparation of PAN-based CFRTP laminated boards via compression molding.
- Orthogonal and single-factor tests to evaluate the impact of process parameters.
- Analysis of effects of compression temperature, pressure, holding time, and cooling rate.
- Optimization of compression molding parameters based on experimental results.
Main Results:
- Compression temperature, pressure-holding time, compression pressure, and cooling rate significantly impact CFRTP mechanical properties.
- The optimal parameters identified were: 150 °C compression temperature, 20 min pressure-holding time, 50 T compression pressure, and 3.5 °C/min cooling rate.
- Optimal mold-opening temperature was determined to be 80 °C.
Conclusions:
- The optimized compression molding process yields CFRTP workpieces with enhanced mechanical properties.
- Achieved tensile strength of 785.28 MPa, bending strength of 680.36 MPa, and interlaminar shear strength (ILSS) of 66.15 MPa.
- This study provides valuable insights for the efficient manufacturing of high-performance CFRTP composites.
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