This study explored the effects of two distinct manufacturing processes for carbon fiber-reinforced polymer (CFRP) on the flexural characteristics of frontally polymerized CFRP. We examined two methods of frontal polymerization: UV-induced frontal polymerization and hot press heat triggered frontal polymerization (HPFP). In addition, a hybrid resin system was utilized to produce laminates with high fiber volume fractions (Vf) of 50 and 60% using a combination of West System epoxy resin (WS) and frontal resin in a weight ratio of 0.3:1. This was achieved by the use of HPFP method. For UV-induced samples, the weight content of the photoinitiator in the frontal resin was set at 0.4 wt%. However, for samples produced using the HPFP approach, the weight content of the photoinitiator varied. The results of our study show that UV-induced FP reduces curing times and improves flexural characteristics compared to the traditional oven-cured approach. However, HPFP offers even greater benefits in terms of controlling laminate thickness and polymerization process. The UV-induced approach resulted in a maximum Vf of 45%. The HPFP approach significantly improved the flexural strength, especially at higher Vf. The strength increased by up to 36% at a Vf of 60% compared to the reference samples which are neat frontal resin laminates and laminates based only on WS epoxy resin. This technique is highly effective in addressing the difficulties related to uneven thickness and control polymerization process that are frequently encountered in UV-induced procedures. By manipulating the amount of initiator used, HPFP not only facilitate the fabrication process but also demonstrate many advantages over the UV-induced FP, establishing itself as a dependable and effective method for advanced composite manufacture.

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Efficient Manufacturing of Carbon Fiber-Reinforced Epoxy-Based Resin Composites via Hot Press-Triggered Frontal Polymerization

  • Amirreza Tarafdar,
  • Ian D. Hosein,
  • Yeqing Wang

摘要

This study explored the effects of two distinct manufacturing processes for carbon fiber-reinforced polymer (CFRP) on the flexural characteristics of frontally polymerized CFRP. We examined two methods of frontal polymerization: UV-induced frontal polymerization and hot press heat triggered frontal polymerization (HPFP). In addition, a hybrid resin system was utilized to produce laminates with high fiber volume fractions (Vf) of 50 and 60% using a combination of West System epoxy resin (WS) and frontal resin in a weight ratio of 0.3:1. This was achieved by the use of HPFP method. For UV-induced samples, the weight content of the photoinitiator in the frontal resin was set at 0.4 wt%. However, for samples produced using the HPFP approach, the weight content of the photoinitiator varied. The results of our study show that UV-induced FP reduces curing times and improves flexural characteristics compared to the traditional oven-cured approach. However, HPFP offers even greater benefits in terms of controlling laminate thickness and polymerization process. The UV-induced approach resulted in a maximum Vf of 45%. The HPFP approach significantly improved the flexural strength, especially at higher Vf. The strength increased by up to 36% at a Vf of 60% compared to the reference samples which are neat frontal resin laminates and laminates based only on WS epoxy resin. This technique is highly effective in addressing the difficulties related to uneven thickness and control polymerization process that are frequently encountered in UV-induced procedures. By manipulating the amount of initiator used, HPFP not only facilitate the fabrication process but also demonstrate many advantages over the UV-induced FP, establishing itself as a dependable and effective method for advanced composite manufacture.