scholarly journals Experimental Study, Characterization and Performance Test of Epoxy Cyclohexane-Based Transparent Polyurethane Material

2021 ◽  
Vol 27 (1) ◽  
pp. 63-67
Author(s):  
Xuemei WANG ◽  
Xiang GUI ◽  
Yingping QI ◽  
Yongfeng SHEN ◽  
Hua LI
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Performance Test ◽  
Membered Ring ◽  
Molecular Chain ◽  
Optical Transparency ◽  
Synthesis Process ◽  
R Value ◽  
And Performance ◽  
Weather Resistance

A novel epoxy cyclohexane-based polyurethane material was synthesized from a self-made epoxy cyclohexane-tetrahydrofuran (CHO-THF) co-polyether. Due to the special rigid six-membered ring skeleton in the polyether molecular chain, the polyurethane materials have excellent mechanical properties, good optical transparency and weather resistance. In this paper, the synthesis process of the epoxy cyclohexane-based polyurethane material was studied and the properties of the material were tested. The results showed that curing parameters R value had effects on the mechanical properties and optical transparency of the material.

Feasibility Study on Composition and Mechanical Properties of Marine Clay Based Geopolymer Brick

2013 ◽  
Vol 594-595 ◽  
pp. 401-405
Author(s):  
S.M. Tamizi ◽  
Abdullah Mohd Mustafa Al Bakri ◽  
Hussin Kamarudin ◽  
C.M. Ruzaidi ◽  
J. Liyana ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Compressive Strength ◽  
Feasibility Study ◽  
Inorganic Polymer ◽  
Synthesis Process ◽  
Local Production ◽  
Marine Clay ◽  
X Ray ◽  
Alkaline Activator

Geopolymer is an inorganic polymer performed in synthesis process of an aluminosilicate material which activated by alkaline activator solution. Marine clay, considered to be a waste substance which have an important aluminosilicate sources in developing geopolymer synthesis since it contains sufficient amounts of alumina and silica. In this experimental study, local marine clay composition was been identified to determine the amount of alumina and silica. The raw sample compositions were identified by using X-ray fluorescence (XRF). Incorporated with it composition, compressive strength of brick were been tested in aged of 1, 2 and 3 day and compared with local production of cement brick (CB). This research is aimed at determining the properties of Kuala Perlis marine clay in order to verify its suitability as a pozzolana materials as well as the sufficient amount of Al and Si to enhance the properties of geopolymer brick.

Experimental Study on Properties of a Kind of New Concrete

2011 ◽  
Vol 250-253 ◽  
pp. 3475-3478
Author(s):  
Mei Xiong
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Performance Test ◽  
Coarse Aggregate ◽  
High Strength ◽  
Paper Study ◽  
Self Compacting Concrete ◽  
Performance Gap ◽  
Dry Mixing ◽  
Concrete Materials

Dry-mixing self-compacting concrete (DSCC) is a kind of new concrete composite materialswhich based on self-compacting concrete vibration. DSCC was prepared with the cement, the coarse aggregate and sand of high strength and some cement replacement materials that had the better crack resistance. And it has the characteristics of filling performance, gap trafficability and anti- segregating like self-compacting concrete. The paper study on the basic mechanical properties and anti-carbonization ability of DSCC through concrete performance test, the results indicate that the basic mechanical properties and durability of DSCC better significantly than common concrete materials.

scholarly journals Preparation and Characterisation of Polyurethane Acrylate-Based Titanium Dioxide Pigment for Blue Light-Curable Ink

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3977
Author(s):  
Chenglong Wang ◽  
Luyang Qiao ◽  
Qiang Zhai ◽  
Kai Yan ◽  
Lili Wang ◽  
...  
Keyword(s):  
Synthesis Process ◽  
Tio2 Content ◽  
Step Method ◽  
The Core ◽  
Polyurethane Acrylate ◽  
Tensile Performance ◽  
R Value ◽  
And Performance ◽  
Polyurethane Prepolymer ◽  
Hyperbranched Structure

Herein, a polyurethane acrylate-based TiO2 (PU-TiO2) was fabricated using a two-step method. First, a polyurethane prepolymer was prepared. Second, PU-TiO2 was prepared using amino-modified TiO2 (A-TiO2). The best synthesis process of the polyurethane prepolymer was when the reaction temperature was 80 °C, the reaction time was 3 h and the R-value of the polyurethane acrylate was 2. Next, the influence of the A-TiO2 content on the structure and performance of PU-TiO2 was examined. The analysis of the rheological properties of the PU-TiO2 ink indicated that its viscosity gradually increased as the A-TiO2 content increased. The tensile performance of film improved because of the presence of A-TiO2. The photo-polymerisation and photo-rheological performance indicated that the PU-TiO2 structure changed from a hyperbranched structure with TiO2 as the core to a segmented structure, as the A-TiO2 content was 3%.

Rancang Bangun Alat Olahan Minyak Kelapa

2016 ◽  
Vol 10 (1) ◽  
pp. 70-77
Author(s):  
Jantri Sirait ◽  
Sulharman Sulharman
Keyword(s):  
Electric Motor ◽  
Performance Test ◽  
Production Capacity ◽  
Coconut Oil ◽  
Heating Time ◽  
Design Tool ◽  
Coconut Milk ◽  
Heating Process ◽  
And Performance ◽  
Time Required

Has done design tool is a tool of refined coconut oil coconut grater, squeezer coconut milk and coconut oil heating, with the aim to streamline the time of making coconut oil and coconut oil increase production capacity. The research method consists of several stages, among others; image creation tool, procurement of materials research, cutting the material - the material framework of tools and performance test tools. The parameters observed during the performance test tools is time grated coconut, coconut milk bleeder capacity, the capacity of the boiler and the heating time of coconut oil. The design tool consists of three parts, namely a tool shaved coconut, coconut milk wringer and coconut milk heating devices. Materials used for the framework of such tools include iron UNP 6 meters long, 7.5 cm wide, 4 mm thick, while the motor uses an electric motor 0.25 HP 1430 rpm and to dampen the rotation electric motor rotation used gearbox with a ratio of round 1 : 60. the results of the design ie the time required for coconut menyerut average of 297 seconds, coconut milk wringer capacity of 5 kg of processes and using gauze pads to filter coconut pulp, as well as the heating process takes ± 2 hours with a capacity of 80 kg , The benefits of coconut oil refined tools are stripping time or split brief coconut average - average 7 seconds and coconut shell can be used as craft materials, processes extortion coconut milk quickly so the production capacity increased and the stirring process coconut oil mechanically.ABSTRAKTelah dilakukan rancang bangun alat olahan minyak kelapa yaitu alat pemarut kelapa, pemeras santan kelapa dan pemanas minyak kelapa, dengan tujuan untuk mengefisiensikan waktu pembuatan minyak kelapa serta meningkatkan kapasitas produksi minyak kelapa. Metode penelitian terdiri dari beberapa tahapan antara lain; pembuatan gambar alat, pengadaan bahan-bahan penelitian, pemotongan bahan - bahan rangka alat dan uji unjuk kerja alat. Parameter yang diamati pada saat uji unjuk kerja alat adalah waktu parut kelapa, kapasitas pemeras santan kelapa, kapasitas tungku pemanas serta waktu pemanasan minyak kelapa. Rancangan alat terdiri dari tiga bagian yaitu alat penyerut kelapa, alat pemeras santan kelapa dan alat pemanas santan kelapa. Bahan yang dipergunakan untuk rangka alat tersebut  yaitu besi UNP panjang 6 meter, lebar 7,5 cm, tebal 4 mm, sedangkan untuk motor penggerak menggunakan motor listrik 0,25 HP 1430 rpm dan untuk meredam putaran putaran motor listrik dipergunakan gearbox  dengan perbandingan putaran 1 : 60. Hasil dari rancangan tersebut yaitu waktu yang dibutuhkan untuk menyerut kelapa rata-rata 297 detik, kapasitas alat pemeras santan kelapa 5 kg sekali proses dan menggunakan kain kassa untuk menyaring ampas kelapa, serta Proses pemanasan membutuhkan waktu ± 2 jam dengan kapasitas 80 kg. Adapun keunggulan alat olahan minyak kelapa ini adalah waktu pengupasan atau belah kelapa singkat rata – rata 7 detik dan tempurung kelapa dapat digunakan sebagai bahan kerajinan, proses pemerasan santan kelapa cepat sehingga kapasitas produksi meningkat dan proses pengadukan minyak kelapa secara mekanis. Kata kunci : penyerut, pemeras, pemanas,minyak kelapa,olahan minyak kelapa.

Metallic Nanoneedles Arrays for TEM Sample Preparation “Lift-Out”

2012 ◽  
Author(s):  
Romaneh Jalilian ◽  
David Mudd ◽  
Neil Torrez ◽  
Jose Rivera ◽  
Mehdi M. Yazdanpanah ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Sample Preparation ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Beam System ◽  
Transmission Electron ◽  
Nanoneedle Array ◽  
Superior Mechanical Properties ◽  
And Performance

Abstract The sample preparation for transmission electron microscope can be done using a method known as "lift-out". This paper demonstrates a method of using a silver-gallium nanoneedle array for a quicker sharpening process of tungsten probes with better sample viewing, covering the fabrication steps and performance of needle-tipped probes for lift-out process. First, an array of high aspect ratio silver-gallium nanoneedles was fabricated and coated to improve their conductivity and strength. Then, the nanoneedles were welded to a regular tungsten probe in the focused ion beam system at the desired angle, and used as a sharp probe for lift-out. The paper demonstrates the superior mechanical properties of crystalline silver-gallium metallic nanoneedles. Finally, a weldless lift-out process is described whereby a nano-fork gripper was fabricated by attaching two nanoneedles to a tungsten probe.

scholarly journals Design and performance test of variable diameter threshing drum of combine harvester

2021 ◽  
Author(s):  
Zhan Su ◽  
Zhao Ding ◽  
Liquan Tian ◽  
Xue Lin ◽  
Zhiming Wang
Keyword(s):  
Performance Test ◽  
Variable Diameter ◽  
Combine Harvester ◽  
And Performance
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