The Fluidity and AC Impedance of Polypropylene Composites Filled with Activated Carbon Black

2012 ◽  
Vol 217-219 ◽  
pp. 634-643
Author(s):  
Nai Xiu Ding ◽  
Li Li Wang ◽  
Mao Sheng Zhan ◽  
Lei Li ◽  
Shuai Feng Xu
Keyword(s):  
Fourier Transform ◽  
Activated Carbon ◽  
Infrared Spectroscopy ◽  
Carbon Black ◽  
Melt Flow Index ◽  
Ac Impedance ◽  
Flow Index ◽  
Carbon Black Content ◽  
Polypropylene Composites ◽  
Conductive Composites

In this paper, carbon black was activated by grafting and coupling respectively. Then the grafted carbon black, coupled carbon black, together with the unmodified carbon black were filled into polypropylene to prepare three kinds of composites respectively. The measurements of Fourier Transform Infrared Spectroscopy (FTIR), melt flow index, and alternating current (AC) impedance were performed on the composites. From the FTIR spectra, it was shown that different groups are bonded to the surface of carbon black after activating treatment For the corresponding conductive composites，it was found that the variation of fluidity with carbon black content and temperature changed after the carbon black activation. The influence of carbon black activation on the AC impedance and fluidity of the composites was analyzed. The scheme describing the interaction between carbon black and polypropylene in composites was given according to the results mentioned above.

Study on Electrical Properties of Activated Carbon Black Filled Polypropylene Composites Using Impedance Analyzer

2013 ◽  
Vol 712-715 ◽  
pp. 175-181 ◽  
Author(s):  
Nai Xiu Ding ◽  
Li Li Wang ◽  
Pei Yan Zuo ◽  
Yong Li ◽  
Guang Ye Liu
Keyword(s):  
Activated Carbon ◽  
Electrical Properties ◽  
Carbon Black ◽  
Dissipation Factor ◽  
Conductive Network ◽  
Impedance Analyzer ◽  
Polypropylene Composites ◽  
Conductive Composites ◽  
Carbon Black Concentration ◽  
Ac Electrical Properties

Carbon black was activated and then filled into polypropylene to prepare conductive composites, of which the electrical properties, including impedance Z, phase angelθ and dissipation factor tgδ, as a function of frequency and carbon black concentration were investigated using impedance analyzer. The percolation threshold of 5wt% carbon black concentration was obtained. It was found that the variation of AC electrical properties as a function of frequency is dramatic and dependent on the carbon black concentration. It was also found that dependence of the real part and the imaginary part of impedance on frequency decreases with the increased concentration of carbon black, while that of phase angle and dissipation factor increases. Based on the corresponding results, the conductive network model and the corresponding equivalent circuit were constructed.

Characterization of microwave-treated oil palm empty fruit bunch/glass fibre/polypropylene composites

2015 ◽  
Vol 30 (7) ◽  
pp. 986-1002 ◽  
Author(s):  
MR Islam ◽  
A Gupta ◽  
M Rivai ◽  
MDH Beg
Keyword(s):  
Glass Fibre ◽  
Oil Palm ◽  
Melt Flow Index ◽  
Flow Index ◽  
Mechanical And Thermal Properties ◽  
Empty Fruit Bunch ◽  
Scanning Calorimetry ◽  
Fixed Temperature ◽  
Polypropylene Composites ◽  
Degradation Temperature

Composites were prepared from recycled polypropylene (RPP), oil palm empty fruit bunch (EFB) and/or glass fibre (GF) using extrusion and injection moulding techniques. Two types of maleic anhydride-grafted polypropylene such as Polybond 3200 and Fusabond P 613 were used to improve the interfacial adhesion between fibres and matrix. The EFB: GF ratio was fixed as 70:30 and fibre loading was considered as 40 wt%. Microwave was used to treat the EFB fibre, which was soaked in a fixed mass concentration (12.5%) of alkali solution at different temperatures (70, 80 and 90°C) for a fixed period of time (60 min) and for different times (60, 90 and 120 min) at a fixed temperature (90°C). A magnetron controller was developed to control the time and temperature accurately for the treatment of fibre. Various characterization techniques such as density, melt flow index, tensile, Izod impact, flexural, field-emission scanning electron microscopy and water uptake testing were performed for the composites. Besides, thermogravimetric analysis and differential scanning calorimetry were also used to evaluate the thermal and crystalline properties of the composites, respectively. Result analyses revealed that microwave-treated fibre-based composites showed improved mechanical and thermal properties. EFB fibres treated at 90°C for 90 min were found to be suitable for better reinforcement into the composite in terms of mechanical, thermal and crystalline properties. Moreover, onset degradation temperature and water absorption properties were also found to be changed apparently due to treatment.

AC Electrical Properties of Titanate-Linkcoupled Carbon Black Filled Polypropylene Composites

2012 ◽  
Vol 217-219 ◽  
pp. 644-651
Author(s):  
Nai Xiu Ding ◽  
Li Li Wang ◽  
Mao Sheng Zhan ◽  
Liang Liu ◽  
Shuai Feng Xu
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Volume Resistivity ◽  
Dissipation Factor ◽  
Experimental Result ◽  
Filler Concentration ◽  
Polypropylene Composites ◽  
Conductive Composites ◽  
Carbon Black Concentration ◽  
Ac Electrical Properties

In this paper, Carbon black was activated using titanate-type coupling agent, and then filled into polypropylene to prepare conductive composites, whose alternating current (AC) electrical properties, including impendence Z, phase angel θ, dielectric constantε and dissipation factor tgδ that is a function of frequency and carbon black concentration were investigated by AC impedance spectroscopy. The percolation threshold of 5wt% carbon black concentration was obtained from the experimental result of volume resistivity for the conductive composites. It was found that the variation of AC electrical properties, which is a function of frequency, was dramatic and dependent on the filler concentration. It was also found that dependence of the real and the imaginary parts of impendence on frequency decreased with the increased concentration of carbon black, while the phase angle, dielectric constant and dissipation factor increased. The AC electrical properties were given based on the conductive network model and the corresponding equivalent circuit were concluded

Mechanistic Study on Adsorption and Oxidation of NO over Activated Carbon

2014 ◽  
Vol 941-944 ◽  
pp. 939-944
Author(s):  
Bing Li ◽  
Jian Ming Xue ◽  
Chun Yuan Ma ◽  
Jian Min Chen
Keyword(s):  
Fourier Transform ◽  
Activated Carbon ◽  
Infrared Spectroscopy ◽  
Conversion Rate ◽  
Active Sites ◽  
No Oxidation ◽  
Mechanistic Study ◽  
No Adsorption ◽  
Oxidation Of No ◽  
Carbon Micropore

Themechanism of NO adsorption and oxidation over activated carbon at lowtemperature has been studied by NO adsorption and oxidation, NO2adsorption and Fourier transform infrared spectroscopy. The results show thatwhen oxygen is present, activated carbon catalyses NO oxidation into NO2and a stable NO conversion rate is achieved. NO is adsorbed in the form of (NO)2due to the confinement effects of the activated carbon micropore. (NO)2is oxidized into NO2 by oxygen. The disproportionation of NO2gives NO and NO3, that causes the peak of the maximum NOconcentration. When the active sites are saturated by NO3, NO2adsorption and disproportionation gradually diminish, that results in NO2breakthrough and increases the concentration of NO2 to thestationary one. At the same time, the concentration of NO gradually decreasesto the stationary one after the maximum.

scholarly journals Characterization of Polystyrene Wastes as Potential Extruded Feedstock Filament for 3D Printing

Recycling ◽  
2018 ◽  
Vol 3 (4) ◽  
pp. 57 ◽  
Author(s):  
Irina Turku ◽  
Sushil Kasala ◽  
Timo Kärki
Keyword(s):  
Fourier Transform ◽  
Glass Transition ◽  
Transition Temperature ◽  
3D Printing ◽  
Acrylonitrile Butadiene Styrene ◽  
Melt Flow Index ◽  
Flow Index ◽  
Recycled Material ◽  
Butadiene Styrene

The recyclability of polystyrene, acrylonitrile butadiene styrene and polyvinylchloride waste and their use as a source for 3D printing were studied. Filaments of about 3 mm in diameter were extruded successfully with a small-size extruder. The processed filaments were tested on a broad range of parameters-melt flow index, glass transition temperature, tensile properties and a pyrolysis scenario were obtained. The measured parameters were compared with parameters of virgin counterparts presented in the literature. In order to estimate the composition of the recycled material, Fourier Transform Infrared and elemental analysis of the samples was done.

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