Improved interfacial shear strength and durability of single carbon fiber reinforced isotactic polypropylene composites using water-dispersible graft copolymer as a coupling agent

1996 ◽  
Vol 17 (3) ◽  
pp. 375-383 ◽  
Author(s):  
Joung-Man Park ◽  
Jang-Oo Lee ◽  
Tchun-Wook Park
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Graft Copolymer ◽  
Isotactic Polypropylene ◽  
Coupling Agent ◽  
Interfacial Shear Strength ◽  
Interfacial Shear ◽  
Polypropylene Composites ◽  
Water Dispersible ◽  
Strength And Durability

scholarly journals Long discontinuous carbon fibre/polypropylene composites for high volume structural applications

2017 ◽  
Vol 52 (9) ◽  
pp. 1155-1170 ◽  
Author(s):  
LT Harper ◽  
DT Burn ◽  
MS Johnson ◽  
NA Warrior
Keyword(s):  
Tensile Strength ◽  
Shear Strength ◽  
Carbon Fibre ◽  
Coupling Agent ◽  
Interfacial Shear Strength ◽  
High Volume ◽  
Interfacial Shear ◽  
Processing Route ◽  
Polypropylene Composites ◽  
Structural Applications

A processing route is presented to manufacture discontinuous carbon fibre-reinforced polypropylene composites, using much longer fibre lengths (25 mm) and higher volume fractions (up to 45%) than previously reported in the literature. Carbon fibre tows are coated with different ratios of polypropylene, blended with a maleic anhydride coupling agent, to investigate the influence of the interfacial shear strength at the microscale on the macroscale composite properties. Improvements in the tensile performance at the macroscale (70% increase) are not as high as those reported for the interfacial shear strength at the microscale (300%), following the addition of the coupling agent. Consequently, the tensile strength of the carbon fibre-reinforced polypropylene material is only 45% of values reported for carbon fibre/epoxy systems, however, the tensile stiffness is comparable. This demonstrates the potential for using carbon fibre-reinforced polypropylene for structural applications, following further process optimisation to overcome the current high levels of porosity (3.3% at 0.45 Vf) to improve the tensile strength.

Effect of Water Temperature on Interfacial Shear Strength of Resin Particles Added CFRTP

2018 ◽  
Vol 774 ◽  
pp. 7-12
Author(s):  
Hideaki Katogi ◽  
Kenichi Takemura ◽  
Mao Mochizuki
Keyword(s):  
Shear Strength ◽  
Carbon Fiber ◽  
Water Temperature ◽  
Room Temperature ◽  
Interfacial Shear Strength ◽  
Water Immersion ◽  
Interfacial Shear ◽  
Water Penetration ◽  
Resin Particle ◽  
Particle Addition

In this study, interfacial shear strength of resin particles added carbon fiber/maleic acid anhydride grafted polypropylene under water temperature was investigated. Water temperature range was from room temperature to 80 oC. The maximum immersion time was 24 hours. Micro debonding tests of non and resin particles added composites were conducted. Fracture surface of resin particles added composite were observed by Scanning Electron Microscope (SEM). As a result, interfacial shear strengths of non particles added composite monotonously decreased with an increase of water temperature. Interfacial shear strength of resin particles added composite was higher than that of non resin particles added composite under all water temperatures except for 50 oC. From SEM observation, large resin particles on surface of carbon fiber after water immersion at 50 oC were found. And, many matrices and large resin particles on surface of carbon fiber after water immersion at 80 oC were found. Therefore, interfacial shear strength of composite was improved because resin particle addition prevented water penetration into the interface between fiber and matrix under water immersion less than 50 oC. And, interfacial shear strength of composite was probably improved by anchor effect of resin particle under water immersion at 80 oC.

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