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 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.

Effects of NR and Liquid NR Loading on Swelling Behaviour of TPU/NR Blends

2013 ◽  
Vol 795 ◽  
pp. 133-136
Author(s):  
Nor Azwin Ahad ◽  
Sahrim Haji Ahmad ◽  
Norazwani Muhammad Zain
Keyword(s):  
Natural Rubber ◽  
Thermoplastic Polyurethane ◽  
Swelling Behavior ◽  
Melt Blending ◽  
Swelling Behaviour ◽  
Blend Ratio ◽  
Equilibrium Swelling ◽  
Liquid Natural Rubber ◽  
Higher Temperature ◽  
Blend Ratios

The blends of thermoplastic polyurethane (TPU) with natural rubber (NR) at four different blend ratios were prepared via melt blending at 180°C and 190°C, with addition of liquid natural rubber (LNR) as compatibilizer. The effect of blend ratio and temperature swelling index was studied. The equilibrium swelling index of TPU and its blend increase with increasing of NR, because of the easiness for solvent to diffuse into the gap between rubber molecules. The temperatures of blending also give effect to swelling behavior. Swelling index of all samples was higher when mixed the blends at higher temperature.

Sonochemically Synthesis of Antimonite Nanoparticles and Its Influence on the Thermal Stability of the ABS Terpolymer

2013 ◽  
Vol 32 (4) ◽  
pp. 339-343 ◽  
Author(s):  
Siyamak Bagheriyan
Keyword(s):  
Thermal Stability ◽  
Acrylonitrile Butadiene Styrene ◽  
X Ray Diffraction ◽  
Limiting Oxygen Index ◽  
X Ray ◽  
Sonochemical Reaction ◽  
Ft Ir ◽  
Higher Temperature ◽  
Thermal Stability Of ◽  
Butadiene Styrene

AbstractSb2S3 nanoparticles were synthesized via a simple sonochemical reaction between SbCl3 and thioacetamide. The effect of different parameters such as power and time of pulsation on the morphology of the product has been investigated. The Sb2 S3 nanostructures were then added to acrylonitrile-butadiene-styrene terpolymer. The effect of Sb2 S3 nanostructures on the thermal stability of the polymeric matrix has been examined. The thermal decomposition of the nanocomposite shifts towards higher temperature in the presence of the Sb2 S3 . Nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), photoluminescence (PL) spectroscopy, thermogravimetric analysis (TGA), UL-94 and limiting oxygen index (LOI) analysis.

scholarly journals Print Velocity Effects on Strain-Rate Sensitivity of Acrylonitrile-Butadiene-Styrene Using Material Extrusion Additive Manufacturing

Polymers ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 149
Author(s):  
Wilco M. H. Verbeeten ◽  
Rob J. Arnold-Bik ◽  
Miriam Lorenzo-Bañuelos
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Strain Rate ◽  
Yield Stress ◽  
Strain Rate Sensitivity ◽  
Molecular Orientation ◽  
Activation Volume ◽  
Rate Sensitivity ◽  
Acrylonitrile Butadiene Styrene ◽  
Butadiene Styrene

The strain-rate sensitivity of the yield stress for Acrylonitrile-Butadiene-Styrene (ABS) tensile samples processed via material extrusion additive manufacturing (ME-AM) was investigated. Such specimens show molecular orientation and interstitial voids that affect the mechanical properties. Apparent densities were measured to compensate for the interstitial voids. Three different printing speeds were used to generate ME-AM tensile test samples with different molecular orientation. Printing velocities influenced molecular orientation and stretch, as determined from thermal shrinkage measurements. Likewise, infill velocity affected the strain-rate dependence of the yield stress. The ABS material manifests thermorheollogically simple behavior that can correctly be described by an Eyring flow rule. The changing activation volume, as a result of a varying print velocity, scales linearly with the molecular orientation, as captured in an estimated processing-induced pre-strain. Therefore, it is suggested that ME-AM processed ABS shows a deformation-dependent activation volume. This paper can be seen as initial work that can help to improve quantitative predictive numerical tools for ME-AM, taking into account the effects that the processing step has on the mechanical properties.

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 Melt Flow Index of Recycle ABS for Fused Deposition Modeling (FDM) Filament

2015 ◽  
Vol 773-774 ◽  
pp. 3-7 ◽  
Author(s):  
Nasuha Sa'ude ◽  
Khairu Kamarudin ◽  
Mustaffa Ibrahim ◽  
Mohd Halim Irwan Ibrahim
Keyword(s):  
Material Properties ◽  
Fused Deposition Modeling ◽  
Acrylonitrile Butadiene Styrene ◽  
Melt Flow Index ◽  
Flow Index ◽  
Melt Flow ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
Higher Temperature ◽  
Butadiene Styrene

This paper presents the melt flow index (MFI) of acrylonitrile butadiene styrene (ABS) and recycle ABS filament wire for Fused Deposition Modeling (FDM) machine. In this study, the effect of MFI on recycle ABS material was investigated experimentally based on the melting temperature, density, screw speed and material properties. The MFI result on ABS recycle in wire filament was investigated using Melt Indexer Machine (MIM). Based on the result obtained, it was found that, ABS recycle was increase the density and MFI results. It can be observed that, the higher temperature was melt the recycle ABS material through the MIM and extruder machine.

Modification of polypropylene properties through additivation and formulation improvements

2019 ◽  
Vol 52 (3) ◽  
pp. 239-252 ◽  
Author(s):  
Kien-Mun Tang ◽  
Chui-Ping Ooi ◽  
Raj Batlaw
Keyword(s):  
Cycle Time ◽  
Flexural Modulus ◽  
Acrylonitrile Butadiene Styrene ◽  
Disodium Salt ◽  
Nucleating Agents ◽  
Blend Ratio ◽  
Engineering Plastics ◽  
Very High ◽  
Better Than ◽  
Butadiene Styrene

Nucleators (nucleating agents) have improved the properties of commodity plastics such as polypropylene (PP), where its properties are now comparable with those of engineering plastics such as polycarbonate and acrylonitrile butadiene styrene. 1 This has enabled commodity plastics to be used in more demanding applications such as baby feeding bottles that need to be sterilized by boiling water and disposable food containers that need very high flow and fast cycle time during production. In order to achieve the targeted performance of the various applications, a higher dosage of nucleator can be used to further enhance the nucleation of PP. However, this would come at the expense of add-on costs since the nucleator is probably the most expensive ingredient (in dollars per kg) in PP stabilization. In this research a non-nucleating coadditive, sodium myristate (NaMy), added into a DHT4A-stabilized homopolypropylene with Milliken Chemical’s Hyperform® HPN68L nucleator (disodium salt of bicycle (2.2.1) heptane-2,3-dicarboxylic acid 2 ) via dry blending was found to be able to boost the nucleation efficiency of HPN68L in PP, thus improving the polymer’s physical properties without increasing the HPN68L concentration. Subsequent tests showed that the optimum blend ratio of 300 ppm HPN68L and 200 ppm NaMy had improved the 300 ppm HPN68L-nucleated PP peak crystallization temperature ( T c) by 2.3°C, clarity by 20.3%, cycle time by 8.9%, heat deflection temperature by 4°C and flexural modulus by 60 MPa. It was discovered that the improvements were due to improved dispersion of the nucleator in PP. Further investigation also demonstrated that coating of NaMy onto HPN68L via a novel coating technique was better than the dry blend method in improving dispersion of the nucleator, resulting in the best nucleation performance.

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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