Electrical conductivity of carbon black/fibres filled glass-fibre-reinforced thermoplastic composites

Glass fibre reinforced polyamide 6 (GFPA6) thermoplastic composites (TPCs) are promising materials with excellent properties, but due to their low surface free energy they are usually difficult to wet, and therefore, possesses poor adhesion properties. μPlasma modification offers potential solutions to this problem through functionalisation of the GFPA6 surface. In this study, the effect of μPlasma on the wetting behaviour of GFPA6 surfaces was investigated. Following single μPlasma treatment scans of GFPA6 samples, a substantial enhancement in wettability was observed. However, the effect of the μPlasma modification was subject to an ageing (hydrophobic recovery) phenomenon, although the enhancement was still partially maintained after 4 weeks. The ageing process was slower when the GFPA6 material was pre-dried and stored in low humidity conditions, thereby demonstrating the importance of the storage environment to the rate of ageing. Orientation of the fibres to the observed contact angle was found to be crucial for obtaining reproducible measurements with lower deviation. The influence of testing liquid, droplet volume and surface texture on the repeatability of the measured contact angle were also investigated.

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Effect of Processing Method on Conductivity and Mechanical Properties of Glass Fibre Reinforced Carbon Black Filled Polyethylene

Frontiers in Materials Science and Technology - Advanced Materials Research ◽

10.4028/0-87849-475-8.131 ◽

2008 ◽

pp. 131-136

Author(s):

Qiang Yuan ◽

Dong Yang Wu ◽

Stuart Bateman ◽

Shirley Zhiqi Shen ◽

C. Gloria-Esparza ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Black ◽

Glass Fibre ◽

Processing Method ◽

Glass Fibre Reinforced

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The effect of fibre length and matrix modification on the fire performance of thermoplastic composites: The behaviour of PP as an example of non-charring matrix

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705720925134 ◽

2020 ◽

pp. 089270572092513

Author(s):

Yousof Ghazzawi ◽

Andres F Osorio ◽

Darren Martin ◽

Asanka P Basnayake ◽

Michael T Heitzmann

Keyword(s):

Glass Fibre ◽

Fibre Composite ◽

Fibre Length ◽

Thermoplastic Composites ◽

Fibre Reinforcement ◽

Fire Performance ◽

Cone Calorimetry ◽

Continuous Glass ◽

Time To Ignition ◽

Glass Fibre Reinforced

The fire performance of fibre-reinforced polypropylene (PP) was investigated with respect to fibre length and modification of the matrix. Fibre lengths of 3 mm, 12 mm, and continuous fibres were used as reinforcements. E-glass continuous fabrics were melt impregnated with PP and consolidated via compression moulding. E-glass fibre-reinforced PP pellets of 3 and 12 mm were compression moulded. Cone calorimetry tests with incident radiant fluxes of 20, 30 and 35 kW m−2 were used to investigate the fire properties of PP glass fibre composites. Results showed that continuous glass fibre reinforced PP exhibits the best fire performance at 20 kW m−2, while 3-mm fibre has the best performance at 35 kW m−2; 12-mm fibre-reinforced PP exhibitedthe lowest performance in comparison with 3-mm and continuous glass fibre reinforcement. Melic-anhydride (MA)-modified PP was found to increase the heat release rate (HRR) by up to 44% and time to ignition by up to 10% depending on the heat flux applied in comparison with unmodified PP. The glass fibre-reinforced composite made with MA-modified PP has 5–12% lower mean HRR and similar time to ignition in comparison with glass fibre composite made by unmodified PP. This suggests improved fibre adhesion plays a role of the fire performance of glass fibre-reinforced PP.

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Effect of Processing Method on Conductivity and Mechanical Properties of Glass Fibre Reinforced Carbon Black Filled Polyethylene

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.32.131 ◽

2008 ◽

Vol 32 ◽

pp. 131-136 ◽

Cited By ~ 1

Author(s):

Qiang Yuan ◽

Dong Yang Wu ◽

Stuart Bateman ◽

Shirley Zhiqi Shen ◽

C. Gloria-Esparza ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Black ◽

Glass Fibre ◽

Conductive Filler ◽

Processing Method ◽

Screw Extruder ◽

Single Screw ◽

Single Screw Extruder ◽

Glass Fibre Reinforced ◽

Twin Screws

The conductivity and mechanical properties of carbon black (CB) filled polyethylene (PE) composites depend on the conductive filler, molecular structure of polymer matrix, and the processing methods which are applied. CB filled high density polyethylene without and with glass fibre (GF) composites have been manufactured using single and twin screws extruder. The composite made from the single screw extruder showed a much higher conductivity than that made from twin screws extruder for CB/PE composites with and without glass fibre. The conductive paths are formed at very low CB content (1wt% CB for GF/CB/PE) when using single screw extruder to manufacture. The microstructure of these composites were analysed using SEM.

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