Plasticized or Flexible PVC (Density: 1.1-1.35 g/cm3): Flexible PVC is formed by the addition of compatible plasticizers to PVC which lower the crystallinity. Name a natural fibre. By observing whether a reaction takes place, chemical properties of some plastics can be identified. Available in many colors and in transparent form, plastics can be rubbery or rigid. Performance & security by Cloudflare, Please complete the security check to access. 6 PROPERTIES OF CONCRETE USED BY DESIGNERS, Design procedures for a Building Foundation (Step by Step), 10 PRACTICAL PROBLEMS TO THINK BEFORE DESIGNING A FOUNDATION. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. The versatility of plastic materials comes from the ability to mold, laminate or shape them and to tailor them physically and chemically. Properties of Materials. ASTM's plastics standards are instrumental in specifying, testing, and assessing the physical, mechanical, and chemical properties of a wide variety of materials and products that are made of plastic and its polymeric derivatives. Plastics are nothing but synthetic organic high polymers. Students who are in Class 8 or preparing for any exam which is based on Class 8 Science can refer NCERT Science Book for their preparation. To know more about me just visit AboutMe, How to make plastic powder for the project about partial replacement of sand with plastic powder.we dont have any machines for making of plastic powder…please explain the solution for my problem, you should also mention the graph of plastic material. It is important to know the general outstanding properties of plastics to make best use of this an engineering material. Thermoplastic : Plastics that can be deformed easily upon heating and can be bent easily. Please enable Cookies and reload the page. The plastics posses excellent electric insulating properties. Following are the general properties of plastics. Characteristics of synthetic fibres. But the resistance to fire temperatue depends upon the plastic structure. Your email address will not be published. Plastic material is essential for any construction. Class 8 Science Chapter 3 LearnFatafat. And much more. Sorry, your blog cannot share posts by email. Your article have all the details and I appreciate you for this. Discuss safety procedures specific to each test. 2. 9._____ can be recycled, reused, melted and rolled into sheets. Plastics are also known as polymers. In addition to above properties, plastics have following qualities. It should also be noted that each plastic material has its own peculiar properties to suit the various uses. The numbers, reflecting the 7 different types of plastic available in the market, are found on the 299 million tons of plastic that is produced annually to make water bottles, sports equipment, medical devices, DVD's and basically any other plastic you can think of. Living Science Solutions for Class 8 Science Chapter 3 Synthetic Fibres And Plastics are provided here with simple step-by-step explanations. large molecule or a macromolecule which essentially is a combination of many subunits They are light weight, smooth and soft than any other fibre. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. CBSE 8 Science. Plastics are used to convey chemicals. Many plastics are found to possess excellent corrosion resistance. Synthetic fibres are cheaper than natural fibre. 4. HYDROMETER ANALYSIS OF SOIL – WHAT, WHY & HOW? Normally thermo-plastics have low melting point and cannot be used where temperature or heat condition persists. The maximum amount of light to pass through the material, therefore, they are transparent materials. […] Hence the success of plastic as an engineering material for a particular purpose will depend upon the correct choice of the variety. 11. Properties of Plastics as a Construction Material. 16. CBSE Science Class 8. I think this because of many reasons, these include the flexibility, hardness, density. Polyamides or Nylon is the major engineering and high performance thermoplastics class because of its good balance of properties. Name some artificial fibres. Working Conditions. Synthetic fibres possess following unique characteristics: They are durable and inexpensive. They are poor conductors of heat and electricity. Plastics, generally, have low ductility and hence plastic structural members may fail without prior warning. Metals and Non Metals Class 8 Science Chapter 4 as per NCERT Book used in CBSE and other Schools. NCERT Book for Class 8 Science Chapter 3 Synthetic Fibers and Plastics is available for reading or download on this page. Phenol formaldehyde and urea formaldehyde plastics are used as fire proofing materials. It is formed by condensing identical units, copolymers for different units. You may need to download version 2.0 now from the Chrome Web Store. 1. Linear polymers and a combination of linear and cross-linked polymers come under thermoplastics. FINENESS OF CEMENT BY BLAINES AIR PERMEABILITY METHOD (IS-4031-PART-2). Transparency/Opaque: The amount of light material allow passing through it is transparency of the material. Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. Plastics are clean, light and shining, so they need not be given any finish such as painting, polishing etc. Plastic materials consist of long chain molecules (polymers). Required fields are marked *, Notify me of follow-up comments via e-mail address. Video what are the properties of plastic ? Your email address will not be published. Plastic is a synthetic material made from a wide range of organic polymers such as polyethylene, PVC, nylon, etc., that can be moulded into shape while soft, and then set into a rigid or slightly elastic form. 8. Plastics easily maintain its shape and do not go under plastic deformations. Chrome web Store to the web property by property group, sort, or semicrystalline solids ( )... And artificial fibres the plastics, have low melting point and can be bent easily these... ( IS-4031-PART-2 ) for different units amorphous solids, crystalline solids, or semicrystalline (! Be deformed easily upon heating and can be rubbery or rigid and the processing of! Resistance to fire temperatue depends upon the correct choice of the following resins and in... 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