Degassing Process Influence on Tensile Strength of Neat E132 Epoxy Polymeric Materials

2021 ◽  
Vol 1026 ◽  
pp. 129-135
Author(s):  
Dominick Wong ◽  
Mahmood Anwar ◽  
Sujan Debnath ◽  
Abdul Hamid Abdullah ◽  
Sudin Izman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Polymeric Materials ◽  
Hot Water ◽  
Fabrication Process ◽  
Limiting Behavior ◽  
Vacuum Degassing ◽  
Ultrasonic Bath ◽  
Average Tensile Strength ◽  
Common Defect

During the composite’s fabrication process, one of the most common defect occurs is void. Numerous literatures have suggested that the presence of void negatively affect its mechanical properties and effective degassing process is one the solutions for such issue. In this study, experiments were carried out using neat E132 epoxy to investigate the effects of different degassing process (hot water, ultrasonic bath, and vacuum) on its tensile strength. The duration of its process was carried out from 5 – 9 minutes for hot water and ultrasonic bath where vacuum process was extended until 10 minutes to observed limiting behavior. It is found that the vacuum degassing method is the most effective. Vacuum degassing process displayed the least formation of bubble and micro voids even for 10 minutes. It is also revealed that vacuum degassing process resulted the highest average tensile strength at 48.8MPa. Such findings would facilitate the well bonded effective nanocomposite fabrication process.

PENGARUH LAMA WAKTU PENGGETARAN ULTRASONIC BATH TERHADAP SIFAT MEKANIK DAN MORFOLOGI PATAHAN BIOKOMPOSIT PATI TAPIOKA/SERAT RAMI (BOEHMERIA NIVEA)

ROTOR ◽  
2017 ◽  
Vol 10 (2) ◽  
pp. 23
Author(s):  
Mochamad Asrofi ◽  
Hairul Abral ◽  
Anwar Kasim ◽  
Adjar Pratoto ◽  
Herwin Gevin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fracture Surface ◽  
Tensile Test ◽  
Dry Weight ◽  
Ramie Fiber ◽  
Compact Structure ◽  
Tapioca Starch ◽  
Ultrasonic Bath ◽  
Vibration Time

This study reported about mechanical properties and fracture surface of ramie fiber reinforced tapioca starch based biocomposites. The amount of fibers in matrix was kept constant at 10% from dry weight starch basis. Fabrication of biocomposites was solution casting. The effect of vibration duration from ultrasonic bath was 0, 15, 30, and 45 min. This treatment was applied to biocomposites while gelatinized. Tensile test was carried out to determine the mechanical properties of biocomposites. Fracture surface of biocomposites after tensile test was observed by using scanning electron microscopy (SEM). The result shows that, tensile strength increased when vibration time was added. The maximum tensile strength was obtained at 45 min vibration time with 2,84 MPa. This phenomenon was supported by SEM observation which indicate compact structure. Keywords: Tapioca starch, ramie fiber, biocomposites, mechanical properties, SEM

scholarly journals Improvement The Mechanical Properties of Styrene Butadiene Rubber By Using Silica Fume

2017 ◽  
Vol 2 (12) ◽  
pp. 31
Author(s):  
Ali Abed Salman
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Silica Fume ◽  
Polymeric Materials ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Materials Used ◽  
Styrene Butadiene

Styrene butadiene rubber (SBR) is considered to be one of the greatest important polymeric materials used as a bond, so we discussed in this study to improve its properties .This study covers the effect of silica fume on mechanical properties of styrene butadiene rubber reinforced with silica fume. The composites were prepared with (1 to 3 wt. %) of silica fume particles .The results had indicated  that the tensile strength and flexural strength are improved by (11.6% and 13.5%) respectively at 2 wt% and the hardness is  improved by (9.3%) at 3wt%.

scholarly journals Investigating mechanical properties of 3D printed parts manufactured in different orientations on Multijet printer

2021 ◽  
Author(s):  
Ramesh Chand ◽  
Vishal S Sharma ◽  
Trehan Rajeev
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Mechanical Behavior ◽  
Polymer Material ◽  
Polymeric Materials ◽  
Tensile Behavior ◽  
Jet Printing ◽  
3D Printed

Abstract Polymer material based products in the engineering field are most widely produced by the multi jet printing (MJP). These products impart inherent benefits in manufacturing intricate contours and shapes at less additional expenses. This emphasizes the importance of studying the mechanical behavior of the manufactured parts, using polymeric materials in different orientations. In this investigation density, tensile behavior & hardness were studied for 3D-printed parts produced in four different orientations (A, B, C and D). It is found that for the best mechanical properties part should be fabricated using orientation ‘A’. Furthermore, for density and tensile strength part should not be fabricated using orientation ‘C’. Also in case of hardness part should not be fabricated in orientation ‘B’.

scholarly journals Synthesis and Characterization of Polysulfone (PSU)/Philippine Halloysite (PH-HAL) Nanostructured Membrane via Electrospinning

2018 ◽  
Vol 213 ◽  
pp. 03001 ◽  
Author(s):  
Ruth R. Aquino ◽  
Marvin S. Tolentino ◽  
Niel Karl G. Arcamo ◽  
John Patrick N. Gara ◽  
Blessie A. Basilia
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fibrous Composite ◽  
Polymeric Materials ◽  
Composite Membranes ◽  
Electrospinning Process ◽  
Synthesis And Characterization ◽  
Separation Processes ◽  
Wide Range

Membrane technology is widely used in many separation processes because of its multi-disciplinary characteristics. One of the techniques that is used in the fabrication of membranes is the electrospinning process which can create nanofibers from a very wide range of polymeric materials. In this study, electrospun nanostructured fibrous composite membranes of polysulfone (PSU), commercial halloysite (COM-HAL), and Philippine halloysite (PH-HAL) were synthesized. The concentrations of COM-HAL and PH-HAL were both varied from 0.5%, 1%, and 2%. The FTIR results showed that there were changes in the intensity of the PSU-IR spectra which confirmed the presence of COM-HAL and PH-HAL in the synthesized membranes. The SEM revealed that nanofibers can be successfully produced by the addition of LiCl salt in PSU with varying HAL concentrations. Also, it was observed that the addition of HAL with varying concentrations have no significant effect on wettability due to the strong hydrophobic character of the PSU membrane. Moreover, it was found from the analysis of mechanical properties that the tensile strength of the membranes weakened by the addition of HAL due to its weak interaction with PSU.

Mechanical Properties of Single and Double-Layered PVA Nanofibers

2013 ◽  
Vol 586 ◽  
pp. 261-264 ◽  
Author(s):  
Pavel Tesárek ◽  
Pavla Ryparová ◽  
Zuzana Rácová ◽  
Vlastimil Králík ◽  
Jiří Němeček ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Unit Area ◽  
Number Of Layers ◽  
Average Tensile Strength ◽  
The Individual

Multi-layered nanofiber textiles can be utilized in many applications. In such case the individual layers are laid in more stages and the question arises whether the connection is perfect. Two kinds of samples of PVA nanotextiles having the weight of 1.3 g/m2 (single-layered, AI) and 2.8 g/m2 (double-layered, AII), respectively. It was shown that mechanical properties, in particular the average tensile strength (24 N/mm for AI and 51 N/mm for AII) and stiffness (950 N/mm for AI and 1600 N/mm for AII), are independent of the number of layers, only their weight per unit area matters. This indicates that the bond between the individual layers is perfect.

scholarly journals Investigating the Effects of Annealing on the Mechanical Properties of FFF-Printed Thermoplastics

2020 ◽  
Vol 4 (2) ◽  
pp. 38 ◽  
Author(s):  
Javaid Butt ◽  
Raghunath Bhaskar
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Surface Finish ◽  
Ultrasonic Testing ◽  
Tensile Testing ◽  
Amorphous Materials ◽  
Microstructural Analysis ◽  
Polymeric Materials ◽  
Fused Filament Fabrication ◽  
Manufacturing Method

Fused filament fabrication (FFF) is a cost-effective additive manufacturing method that makes use of thermoplastics to produce customised products. However, there are several limitations associated with FFF that are adversely affecting its growth including variety of materials, rough surface finish and poor mechanical properties. This has resulted in the development of metal-infused thermoplastics that can provide better properties. Furthermore, FFF-printed parts can be subjected to post-processes to improve their surface finish and mechanical properties. This work takes into consideration two commonly used polymeric materials, i.e., ABS (acrylonitrile butadiene styrene) and PLA (polylactic acid) and compares the results with two metal-infused thermoplastics i.e., copper-enhanced PLA and aluminium-enhanced ASA (acrylonitrile styrene acrylate). The four different materials were subjected to a post-process called annealing to enhance their mechanical properties. The effect of annealing on these four materials was investigated through dimensional analysis, ultrasonic testing, tensile testing, microstructural analysis and hardness testing. The results showed that annealing affects the materials differently. However, a correlation among ultrasonic testing, tensile testing and microstructural analysis was observed for all the materials based on their crystallinity. It was found that the semi-crystalline materials (i.e., PLA and copper enhanced PLA) showed a considerable increase in tensile strength post-annealing. However, the amorphous materials (ABS and aluminium-enhanced ASA) showed a comparatively lower increase in tensile strength, demonstrating that they were less receptive to annealing. These results were supported by higher transmission times and a high percentage of voids in the amorphous materials. The highest hardness values were observed for the ASA material and the lowest for the ABS material. This work provides a good comparison for the metal-infused thermoplastics and their applicability with the commonly used PLA and ABS materials.

Hot Water Extraction of Corncob Hemicelluloses to Prepare Composite Films

2014 ◽  
Vol 989-994 ◽  
pp. 412-415
Author(s):  
Qing Xue Yu ◽  
Guang Yu ◽  
Yue Dong Zhang ◽  
Ye Fei Liu ◽  
Hai Song Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Phase Separation ◽  
Cross Section ◽  
Composite Films ◽  
Thermal Characteristics ◽  
Hot Water ◽  
Hot Water Extraction ◽  
Elongation At Break ◽  
Continuous Surface

In this study, corncob hemicelluloses were extracted by hot water to investigate its potential for film production. Extracted hemicelluloses were mixed with PVA 30 wt%, the prepared films had a smooth、uniform and continuous surface and dense cross section without the phase separation, as characterized by SEM. Besides, the mechanical properties and thermal characteristics tests showed that the films had a tensile strength of 4.6 MPa, elongation at break of 6.4%, and a nice thermally stability.

A Preliminary Study: Influence of Alkali Treatment on Physical and Mechanical Properties of Agel Leaf Fiber (Corypha gebanga)

2016 ◽  
Vol 842 ◽  
pp. 61-66 ◽  
Author(s):  
Hendri Hestiawan ◽  
Jamasri ◽  
Kusmono
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Alkali Treatment ◽  
Fiber Surface ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Tensile Tests ◽  
Hydroxyl Groups ◽  
Plant Fibers ◽  
Removal Of Impurities

The aim of this research is to investigate the alkali treatment influence on tensile strength physical and mechanical properties of agel leaf fibers (ALF). The presence of surface impurities and the large amount of hydroxyl groups make plant fibers less attractive for polymeric materials reinforcement. ALF were subjected to alkali treatments with 2 and 4% NaOH solutions for different soaking times of 1, 12, and 24 hours at room temperature. The tensile test of single fiber was done according to ASTM D3379-75 standard. The chemical changes and the fiber surface after alkali treatment were investigated by using Fourier transform-infrared (FTIR) and scanning electron microscopy (SEM), respectively. Tensile tests showed the alkali treatment of ALF results in different tensile strength compared to untreated ALF. The highest tensile strength (1464 MPa) is found for ALF immersed in 4% NaOH for 1 hour. FTIR showed that the hemicellulose and lignin components in the ALF are removed by NaOH treatment. SEM observation of the treated ALF showed the removal of impurities and the increase of roughness on the ALF surface with alkalization. These results show that alkali treatment can increase the tensile strength of ALF.

Mechanical properties of vapor-grown carbon fibers prepared from benzene in Linz–Donawitz converter gas by floating catalyst method

1992 ◽  
Vol 7 (11) ◽  
pp. 3019-3022 ◽  
Author(s):  
Munehiro Ishioka ◽  
Toshihiko Okada ◽  
Kenji Matsubara
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Young’S Modulus ◽  
Carbon Fibers ◽  
Young's Modulus ◽  
Average Tensile Strength ◽  
Converter Gas

Tensile strength and Young's modulus were determined for vapor-grown carbon fibers (VGCF's) prepared from benzene in Linz–Donawitz converter gas (LDG) by the floating catalyst method. The tensile strength decreased with increasing diameter and volume and depended strongly on whether the fiber was straight or crooked. The average tensile strength of straight fibers was 2.05 GPa, while that of crooked fibers was 1.09 GPa. The latter broke at bends in the fiber where they acted as defects. The average Young's modulus of straight fibers was 163 GPa, while that of crooked fibers was a little higher at 197 GPa. VGCF's prepared in LDG appeared to have comparable mechanical properties to those grown in hydrogen.

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

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