As said before graft process is the base of the synthesis of ABS and it is important to follow the steps in order to obtain the desired product. Rubber and monomers like acrylonitrile and styrene are the only reagents that can produce this thermoplastics whose properties will depend on the proportion of the reagents used. All the grafting process could be summarized by the following reaction that has ABS as the final product: Figure 6. General reaction of the synthesis of
Equipment • Filter paper • Buhner funnel • Tubing • Clean solvent • Disposable dropper Method 1. When carrying out this scientific technique you first need filter paper, tubing, clean solvent, and disposable dropper. 2. Clamp the flask firmly to the ring stand and add the Buhner funnel with a rubber funnel stopper. 3.
Friction drilling is a non-traditional hole-making method that utilizes the heat generated from friction between a rotating conical tool and the work-piece to soften and penetrate the work-material and generate a hole in a thin-walled work-piece. It forms a bushing in-situ from the thin-walled work-piece and is a clean, chip-less process. The purpose of the bushing is to increase thickness for the threading and available clamp load. Thermal drilling is a process that uses friction to produce bushing in metal tubing and flat stock. It is a process of combined rotational and downward force, which creates frictional heat that can reach 900 c for the tool and 700 c for the work-piece.
I see this material as the best for the cold weather gloves because they are highly insulating and windproof. However in the warm conditions, they are too poor because of their ventilation which is as well poor. Rubber Rubber is highly flexible. It is protective of the skin and it is not heavy making it an excellent insulator that repels water very well. The special rubber called neoprene is used to make gloves which are long lasting.
126.96.36.199 Resin Transfer Moulding (RTM) This process uses a two sided (halves) mould that forms both surfaces of a laminate. The lower side of the mould is made rigid while the upper side is either a rigid or a flexible mould. The two sides fit together to form a mould cavity. With resin transfer infusion the reinforcements are placed into the mould cavity and the cavities are clamped together. Resin is then pumped into the mould, infusing the reinforcement material in the process.
The ethane-1,2-diol is recycled. There are two type of polyester production; batch and continuous process. In a continuous process, the product can be fed directly into melt-spinning heads while on the other hand the removal of casting, chipping, blending and drying is a must in the batch processing. Cement
The situation can prolong the colour of the cloth. Figure 4.2 shows the chemical structure of tamarind. The ion exchanger based on tamarind kernel powder that is have hydrophilic properties and biodegradable, while ion exchangers prepared from petrochemical products are hydrophobic and not biodegradable. The Dyeing Process In this study, the mordanting / dyeing (metachrome) method are both mordanting and dyeing is conduct simultaneously is chosen. In metachrome process, the the dye and mordants are formed on the fiber by simultaneous action.
• Step 2: Winding – A nitinol wire is wound on a jig to make the skeleton of the stent; the process is called wire braiding or knitting. Stents skeletons can also be made by cutting the desired pattern on small tubes of starting OD 0.5mm size using Nd:YAG laser systems. The image on the left shows the wire braiding process and the image on the right shows the laser tube cutting process. • Step 3: Heating - The skeleton is heated in an oven, to retain the shape memory in the metal. • Step 4: Polishing – The stent is polished by mounting the stent in a special jig and rotating it through a container with abrasive grains, this removes micro cracks, residue and impurities on the stent
The pipe is in the form of a venturi it narrows in section and then widens again, causing the airflow to increase in speed in the narrowest part. Below the venturi is a butterfly valve called the throttle valve a rotating disc that can be turned end-on to the airflow, so as to hardly restrict the flow at all, or can be rotated so that it (almost) completely blocks the flow of air. This valve controls the flow of air through the carburetor throat and thus the quantity of air/fuel mixture the system will deliver, thereby regulating engine power and speed. The throttle is connected, usually through a cable or a mechanical linkage of rods and joints or rarely by pneumatic link, to the accelerator pedal on a car or the equivalent control on other vehicles or
Environment friendly. 1.3. Limitations of powder metallurgy 1) Die and equipment cost is quiet high. Therefore, the process is feasible for mass production. 2) A surface pollution (oxidation or adsorption) introduces the foreign and detrimental matter in the metal powders this can be avoided if all the processes undergone are made in a clean environment i.e.