Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (11): 84-88.doi: 10.13475/j.fzxb.20201004005

• Textile Engineering • Previous Articles     Next Articles

Mechanical properties of carbon fiber/polypropylene/polylactic acid reinforced composites

SONG Xueyang1, ZHANG Yan1, XU Chenggong2, WANG Ping1(), RUAN Fangtao2   

  1. 1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215000, China
    2. School of Textile and Garment, Anhui Polytechnic University, Wuhu, Anhui 241000, China
  • Received:2020-10-20 Revised:2021-08-11 Online:2021-11-15 Published:2021-11-29
  • Contact: WANG Ping E-mail:pingwang@suda.edu.cn

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Abstract:

In order to reduce the content of polypropylene (PP) in carbon fiber/PP composites and reduce the environmental degradation pressure without changing the mechanical properties of carbon fiber/PP composites, the carbon fiber/PP composite resin system was doped with degradable polylactic acid (PLA) to form a blended resin system, and the carbon fiber reinforced blended resin composites were prepared by hot pressing. The effects of the mass ratio of PLA toPP blends on the impact, bending and tensile properties of the composites were investigated. The results show that with the increase of mass fraction of PLA in resin system, the impact and bending strength of carbon fiber composites decrease first and then increase, while the tensile strength increases first and then decreases. When the PLA mass fraction is 60%, the impact strength and flexural strength of the composites are the highest at 21.8 kJ/m2 and 112.5 MPa, and the tensile strength is 37.2 MPa, which has the optimal comprehensive physical and mechanical properties, which is similar to the mechanical properties of the composites without PLA.

Key words: carbon fiber, composite, hot pressing, polypropylene, polylactic acid, mechanical property

CLC Number: 

  • TB332

Tab.1

Melt index of PLA/PP blends with different PLA content"

PLA质量分数/% 0 20 40 60 80 100
熔融指数/(g·(10 min)-1) 7.7 8.2 18 44 55 >60

Fig.1

Manufacturing process of continuous carbon fiber reinforced composites"

Fig.2

Impact strength of composites with different PLA mass fraction"

Fig.3

Bending properties of composites with different PLA mass fraction. (a) Bending strength; (b) Bending stress and strain curves"

Fig.4

Tensile properties of composites with different PLA mass fraction. (a) Tensile strength; (b) Tensile stress and strain curves"

Fig.5

Tensile fracture surface morphology of composite with different PLA mass fraction (×40)"

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