There is a plastic suitable for almost any application. 11. It is important to know the general outstanding properties of plastics to make best use of this an engineering material. Available in many colors and in transparent form, plastics can be rubbery or rigid. 2. 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. Each plastic material has its own peculiar properties to suit its particular uses. Living Science Solutions for Class 8 Science Chapter 3 Synthetic Fibres And Plastics are provided here with simple step-by-step explanations. Polyamides or Nylon is the major engineering and high performance thermoplastics class because of its good balance of properties. Many plastics are found to possess excellent corrosion resistance. 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. I believe that the mystery plastic, which for me was orange, was the same type of plastic as the green plastic. Video what are the properties of plastic ? The versatility of plastic materials comes from the ability to mold, laminate or shape them and to tailor them physically and chemically. 9._____ can be recycled, reused, melted and rolled into sheets. A) It is non-reactive. Characteristics of synthetic fibres. These solutions for Synthetic Fibres And Plastics are extremely popular among Class 8 students for Science Synthetic Fibres And Plastics Solutions come handy for quickly completing your homework and preparing for exams. Synthetic Fibres and Plastics. It should also be noted that each plastic material has its own peculiar properties to suit the various uses. Filed Under: Class 8, Synthetic fibres and Plastics Tagged With: artificial silk, rayon, semi-synthetic fibre, uses of rayon, viscose About Mrs Shilpi Nagpal Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. Some properties of plastics include their light weight, high resistance to various chemicals, thermal and electrical insulation and their wide range of colors, characteristics and potential uses. You can follow me on Instagram. Polyvinyl chloride (PVC) plastics are non-inflammable. Examples: Plastic, Air, and Glass. Plastics are clean, light and shining, so they need not be given any finish such as painting, polishing etc. The maximum amount of light to pass through the material, therefore, they are transparent materials. Plastics possess excellent insulating property, so used as electric insulators. 4. Class-8 » Science. Plastic material is essential for any construction. The name Plastic is derived from the Greek word plastikos, which means able to be shaped. Phenol formaldehyde and urea formaldehyde plastics are used as fire proofing materials. List and explain four properties of plastic give one use of plastic linked to each of these properties This question has not been answered yet! Distribute materials and worksheets to students. Synthetic Fibres and Plastics Class 8 Science Chapter 3 - Synthetic Fibres and their Properties. Use our interactive properties table below to explore by property group, sort, or compare two or more plastic materials. I think this because of many reasons, these include the flexibility, hardness, density. Linear polymers and a combination of linear and cross-linked polymers come under thermoplastics. NCERT Book for Class 8 Science Chapter 3 Synthetic Fibers and Plastics is available for reading or download on this page. Working Conditions. By observing whether a reaction takes place, chemical properties of some plastics can be identified. They are poor conductors of heat and electricity. –CO-NH–. Properties of Plastics as a Construction Material. In addition to above properties, plastics have following qualities. Save my name, email, and website in this browser for the next time I comment. Short Q&A: Q1: Differentiate between natural and artificial fibres. Plastics easily maintain its shape and do not go under plastic deformations. large molecule or a macromolecule which essentially is a combination of many subunits CBSE 8 Science. Notify me of follow-up comments by email. Answer: Cotton Question 2. Prepared by :- MOHAMMAD SIDDIQ SALIM III SEM - II YR B-arch POORNIMA UNIVERSITY, jaipur 2. Plastics, being organic in nature, are combustible. And much more. 3. Synthetic fibres … They are light weight, smooth and soft than any other fibre. Plastics are nothing but synthetic organic high polymers. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. Metals and Non Metals Class 8 Science Chapter 4 as per NCERT Book used in CBSE and other Schools. HOW TO BLEND AGGREGATE USING FINENESS MODULUS VALUE? Name a natural fibre. 3) They are strong,wrinkle resistant,easy to wash and dry,not attacked by moths,has high abrasion resistance,suitable for making dress material. For the most part, they are: Lightweight with a high strength-to-weight ratio; Can be manufactured inexpensively and mass produced; Water resistant; Shock resistant; Thermally and electrically insulating; Metal vs Plastic Which of the following properties of plastic makes it most convenient for use? 8.Plastics arrangement is _____ (a)Linear (b)Cross linked (c)Linear as well as cross linked (d)None of these. 01 Crop Production and Management. Properties of plastics vary depending on the chemical composition, arrangements and the processing method of its subunits. PLASTIC 1. 8. The plastics have low thermal conductivity and therefore foamed or expanded varieties of plastics are used as thermal insulators. Your email address will not be published. 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. (a)Polyster (b)Plastics (c)Both of these (d) None of these. The lesson covers the complete explanation of class 8 Chapter 4 Metals and Non Metals.Topics covered are Introduction to metals, physical and chemical properties of metals. Some plastics also react chemically with other reactants. Certain plastics are seriously affected by ultraviolet light. 9. The success of plastic as an engineering material will depends up on the selection of variety of plastic. Answer: Protein Question 3. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Please enable Cookies and reload the page. Material Properties of Plastics 1.1 Formation and Structure The basic structure of plastics (or polymers) is given by macromolecule chains, formulated from monomer units by chemical reactions. Sorry, your blog cannot share posts by email. 16. explains properties like plastic is nonreactive, plastic is light strong & durable, etc for CBSE Class 8 Science. 7. Plastic shapes include sheet, rod, hex, pipe, cubes, balls, and tubes. Another way to prevent getting this page in the future is to use Privacy Pass. Name some artificial fibres. But the resistance to fire temperatue depends upon the plastic structure. https://www.youtube.com/watch?v=Tnvd9OUPu3A, Being subjected to creep under constant load. CBSE Science Class 8. 6. Class 8 Science Chapter 3 LearnFatafat. Plastics generally possess sufficient durability, provided they offer sufficient surface hardness. 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. All operations like drilling, sawing, punching, clamping etc are carried out easily … Hence the success of plastic as an engineering material for a particular purpose will depend upon the correct choice of the variety. Synthetic Fibres and Plastics Class 8 Science Chapter 3 as per NCERT Book used in CBSE and other Schools. 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