Some microwave and mechanical properties of carbon fiber-polypropylene and carbon black-polypropylene composites

1996 ◽  
Vol 31 (10) ◽  
pp. 1195-1206 ◽  
Author(s):  
Akif Kaynak ◽  
Andan Polat ◽  
Ulku Yilmazer
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Carbon Black ◽  
Polypropylene Composites

Investigation of thermal and mechanical properties of synthetic graphite and recycled carbon fiber filled polypropylene composites

2019 ◽  
Vol 6 (6) ◽  
pp. 065312 ◽  
Author(s):  
Metehan Atagur ◽  
Orhan Akyuz ◽  
Kutlay Sever ◽  
Yoldas Seki ◽  
Ozgur Seydibeyoglu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Thermal And Mechanical Properties ◽  
Polypropylene Composites ◽  
Synthetic Graphite

Evaluating the Effect of Carbon Black—A Short Carbon Fiber Hybrid Filler on the Electro-Activated Shape Memory Cyanate Ester/Epoxy Composites

2020 ◽  
Vol 12 (5) ◽  
pp. 652-658 ◽  
Author(s):  
Yong-Kun Wang ◽  
Liang-Chao Wang ◽  
Yu-Ting Zhang ◽  
Jun-Jie Ye ◽  
Yang Shi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Carbon Black ◽  
Shape Memory ◽  
Storage Modulus ◽  
Synergistic Effects ◽  
Cyanate Ester ◽  
Short Carbon Fiber ◽  
And Storage ◽  
Short Carbon

An electro-activated type shape memory cyanate ester-epoxy (CE-EP) composites containing short carbon fiber (SCF) and carbon black (CB) were fabricated, where SCF linked among CB particles to make the superior conductivity network in compositions. In the compositions, the content of CB was fixed at 5 wt%, while the amount of SCF was ranged from 0 to 0.9 wt%. The synergistic effects of SCF and CB on the mechanical properties test, electrical properties, SEM, DMA and the electro-activated type shape memory experiment was reviewed. The outcomes showed that when the parts of SCF is less than 0.9%, the mechanical properties and storage modulus of required compositions expand with the content of the SCF growth. But, when the SCF content reaches 0.9 wt%, the flexural strength and storage modulus of the compositions decrease slightly. With the growth of SCF content, the glass transformation temperature increases from 89 °C to 103 °C and the resistivity of the composites decreases gradually. The resistivity of the composites is only 7.37 Ω/cm with 0.9 wt% of SCF. Further, the thermal response speed and shape convalescence rate of the compositions increase greatly with the growth of SCF content.

Effect of carbon fiber amount and length on flame retardant and mechanical properties of intumescent polypropylene composites

2017 ◽  
Vol 52 (4) ◽  
pp. 519-530 ◽  
Author(s):  
Lemiye Atabek Savas ◽  
Aysenur Mutlu ◽  
Ali Sinan Dike ◽  
Umit Tayfun ◽  
Mehmet Dogan
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Carbon Fiber ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Mechanical Test ◽  
Mechanical Analysis ◽  
Limiting Oxygen Index ◽  
Polypropylene Composites ◽  
Index Value

The effects of carbon fiber amount and length were studied on the flame retardant, thermal, and mechanical properties of the intumescent polypropylene composites. The flame retardant properties of the intumescent polypropylene-based composites were investigated using limiting oxygen index, vertical burning test (UL-94), and mass loss calorimeter. The mechanical properties of the composites were studied using tensile test and dynamic mechanical analysis. According to the flammability tests results, the antagonistic interaction was observed between carbon fiber and ammonium polyphosphate. The limiting oxygen index value reduced steadily as the added amount of carbon fiber increased. Mechanical test results revealed that the addition of carbon fiber increased the tensile strength and the elastic modulus as the added amount increased. No effect of carbon fiber length was observed on the flammability, fire performance, and tensile properties of composites, whereas the elastic modulus increased as the carbon fiber initial length increased.

Mechanical properties of vapor-grown carbon fiber composites with thermoplastic matrices

1999 ◽  
Vol 14 (7) ◽  
pp. 2871-2880 ◽  
Author(s):  
Gary G. Tibbetts ◽  
John J. McHugh
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Carbon Fiber ◽  
Surface Preparation ◽  
Fiber Surface ◽  
Three Dimensions ◽  
Injection Molding Process ◽  
Carbon Fiber Composites ◽  
Molding Process ◽  
Polypropylene Composites

This article discusses the mechanical properties of vapor-grown carbon fiber (VGCF)/nylon and VGCF/polypropylene composites. Fibers in the as-produced condition yielded composites with marginally improved mechanical properties. Microscopic examination of these composites clearly showed regions of uninfiltrated fibers, which could account for the unsatisfactory mechanical properties. The infiltration of the fibers by both polymers was improved by carefully ball milling the raw fiber so as to reduce the diameter of the fiber clumps to less than 300 μm. Properties of composites made with ball-milled material were improved in every respect. VGCF reinforcement in nylon slightly improved the tensile strength and doubled the modulus, while VGCF in polypropylene doubled the tensile strength and quadrupled the modulus compared to unreinforced material. Moreover, the composites were sufficiently improved that differences in fiber surface preparation became important. For example, air-etched fibers and fibers covered with low concentrations of aromatics produced polypropylene composites with significantly better mechanical properties than did fibers whose surfaces were heavily coated with aromatics. Both the tensile strength and the modulus of the composites fabricated with clean fibers exceeded theoretical values for composites made with fibers randomly oriented in three dimensions, indicating that the injection-molding process oriented the fibers to some extent.

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