scholarly journals EMI shielding of ABS composites filled with different temperature-treated equal-quantity charcoals

RSC Advances ◽  
2019 ◽  
Vol 9 (41) ◽  
pp. 23718-23726
Author(s):  
Krishna Kamal Halder ◽  
V. K. Sachdev ◽  
Monika Tomar ◽  
Vinay Gupta
Keyword(s):  
Acrylonitrile Butadiene Styrene ◽  
Hot Compression ◽  
Emi Shielding ◽  
Different Temperatures ◽  
Dry Mixing ◽  
Butadiene Styrene

Acrylonitrile-butadiene-styrene (ABS) composites were prepared by dry mixing equal-quantity (20 wt%) charcoals treated at different temperatures followed by hot compression.

scholarly journals Migration from acrylonitrile butadiene styrene (ABS) polymer: swelling effect of food simulants compared to real foods

2021 ◽  
Author(s):  
Valeria Guazzotti ◽  
Annika Ebert ◽  
Anita Gruner ◽  
Frank Welle
Keyword(s):  
Acrylonitrile Butadiene Styrene ◽  
Polymer Swelling ◽  
Food Simulants ◽  
Diffusion Parameters ◽  
Compliance Testing ◽  
Diffusion Migration ◽  
Different Temperatures ◽  
Effect Of Food ◽  
High Concentrations ◽  
Butadiene Styrene

AbstractMaterials and articles made of acrylonitrile–butadiene–styrene (ABS) intended for contact with food must comply with the requirements of the European Plastic Regulation (EU) 10/2011, which lays down the food simulants and the time/temperature conditions to be applied for migration testing. Previous studies indicated that high concentrations of ethanol at temperatures above ambient may lead to swelling of ABS polymers resulting in increased migration. In this study migration kinetic data for a set of model substances at different temperatures were obtained using both food simulants stipulated in EU regulations and real food (milk, cream and olive oil). At the same time, the extent of polymer swelling was gravimetrically characterized after contact with simulants and different foods tested at several conditions to cover the majority of foreseeable applications of ABS. The obtained results confirmed that the use of high concentrations of ethanol–water, especially at high temperatures, causes the swelling of ABS polymers and results in significantly higher migration values compared to the tested foods as well as Tenax®. None of the real foods studied cause significant swelling of ABS. The widely used simulant 95% (v/v) aqueous ethanol proves not be suitable for compliance testing of ABS under the recommended conditions of Regulation (EU) 10/2011. Swelling of the polymer results in artificially higher diffusion coefficients or lower activation energies of diffusion. Migration prediction using polymer-specific diffusion parameters should therefore be considered to avoid over-conservative risk assessment for food contact materials and articles made of ABS.

Effect of Polymer Matrix in Polymer/trGO Nano-Composite for EMI Shielding Application in Microwave and Infrared Region

2021 ◽  
Vol 875 ◽  
pp. 153-159
Author(s):  
Khadija Zubair ◽  
Muhammad Fayzan Shakir
Keyword(s):  
Composite Films ◽  
Acrylonitrile Butadiene Styrene ◽  
Infrared Region ◽  
Network Analyzer ◽  
Shielding Effectiveness ◽  
Interconnected Network ◽  
Emi Shielding ◽  
Nano Composite ◽  
Reduced Graphene ◽  
Butadiene Styrene

Thermally reduced graphene oxide (trGO) was successfully prepared and confirmed by XRD then dispersed in polystyrene (PS) and Acrylonitrile-Butadiene-Styrene (ABS) polymers and evaluated for EMI shielding in microwave and infrared (IR) region. Thickness of prepared polymer/trGO composite films were 200-250 micron. It was observed that trGO has more compatibility with PS then ABS and dispersed more easily and uniformly in PS than ABS. This effect was also observed in IR shielding as ABS+15trGO have 3% transmission and PS+1% trGO have 1.5% transmission. Maximum 29 dB and 25 dB shielding effectiveness was measured by vector network analyzer (VNA) in microwave region (9-18 GHz) of PS+2% trGO and ABS+2% trGo composite respectively. These results clearly indicating that trGO is more compatible with PS than ABS and form more stable and mature interconnected network structure in PS at lower concentrations.

scholarly journals Rheological Investigation of Relaxation Behavior of Polycarbonate/Acrylonitrile-Butadiene-Styrene Blends

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1916
Author(s):  
Jae Sik Seo ◽  
Ho Tak Jeon ◽  
Tae Hee Han
Keyword(s):  
Yield Stress ◽  
Low Frequency ◽  
Acrylonitrile Butadiene Styrene ◽  
Blend Ratio ◽  
Internal Structures ◽  
Internal Network ◽  
Different Temperatures ◽  
Higher Temperature ◽  
Blend Ratios ◽  
Butadiene Styrene

The rheological properties of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blends with various blend ratios are investigated at different temperatures to determine the shear dependent chain motions in a heterogeneous blend system. At low frequency levels under 0.1 rad/s, the viscosity of the material with a blend ratio of 3:7 (PC:ABS) is higher than that of pure ABS polymer. As the temperature increases, the viscosities of ABS-rich blends increase rather than decrease, whereas PC-rich blends exhibit decrease in viscosity. Results from the time sweep measurements indicate that ordered structures of PC and the formation and breakdown of internal network structures of ABS polymer occur simultaneously in the blend systems. Newly designed sequence test results show that the internal structures formed between PC and ABS polymers are dominant at low shear conditions for the blend ratio of 3:7 and effects of structural change and the presence of polybutadiene (PBD) become dominant at high shear conditions for pure ABS. The results of yield stress and relaxation time for PC/ABS blends support this phenomenon. The specimen with a blend ratio of 3:7 exhibited the highest value of yield stress at high temperature among others, which implies that the internal structure become stronger at higher temperature. The heterogeneity of ABS-rich blends increases whereas that of PC-rich blends decreases as temperature increases.

scholarly journals Tensile Behavior of Acrylonitrile Butadiene Styrene at Different Temperatures

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Jiquan Li ◽  
Yadong Jia ◽  
Taidong Li ◽  
Zhou Zhu ◽  
Hangchao Zhou ◽  
...  
Keyword(s):  
Mechanical Response ◽  
Glassy State ◽  
Quantitative Relationship ◽  
Acrylonitrile Butadiene Styrene ◽  
Tensile Behavior ◽  
Fitting Method ◽  
Wide Range ◽  
Different Temperatures ◽  
Good Agreement ◽  
Butadiene Styrene

Temperature greatly influences the mechanical response of acrylonitrile butadiene styrene (ABS). The tensile behavior of ABS was explored in this study. The tensile experiments were conducted at a wide range of temperatures (from 40°C to 130°C). A model was established to reveal the quantitative relationship between temperature and tensile behavior of ABS. The results of tensile experiments showed that tensile behavior of ABS exhibited glassy state and high-elastics state. The model was also divided into two parts that rely on the boundary of glass transition temperature, in which the parameters of the model were calculated by the fitting method. The model predictions showed a good agreement with the results of the experimental tensile test. This study provides the quantitative relationship between temperature and tensile behavior of ABS, which saves time and experimental costs.

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