Living Science Solutions for Class 8 Science Chapter 3 Synthetic Fibres And Plastics are provided here with simple step-by-step explanations. Geotechnical-Material Engineer. Each plastic material has its own peculiar properties to suit its particular uses. The plastics, prepared from phenolic resins, are only good in resisting weather effects. 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! Your IP: 45.62.196.10 I believe that the mystery plastic, which for me was orange, was the same type of plastic as the green plastic. 8.Plastics arrangement is _____ (a)Linear (b)Cross linked (c)Linear as well as cross linked (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. Synthetic fibres possess following unique characteristics: They are durable and inexpensive. Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. large molecule or a macromolecule which essentially is a combination of many subunits Transparency/Opaque: The amount of light material allow passing through it is transparency of the material. Class 8 Science Chapter 3 LearnFatafat. The plastics are sufficiently strong and can be used for load bearing structural members. Polyvinyl chloride (PVC) plastics are non-inflammable. Working Conditions. 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. 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. 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. 6. Answer: Nylon, terylene, PET, acrylic, teflon, etc. 01 Crop Production and Management. Synthetic fibres are cheaper than natural fibre. 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. 2) They are softer than nylon fibres. Plastics come from polymers, hence all plastics are polymers, but not all polymers are plastic. […] The versatility of plastic materials comes from the ability to mold, laminate or shape them and to tailor them physically and chemically. 7. Plastic, polymeric material that has the capability of being molded or shaped. 9. Plastics are clean, light and shining, so they need not be given any finish such as painting, polishing etc. 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. Characteristics of synthetic fibres. Depending on physical properties, plastics are divided into two types: Thermoplastic and thermosetting. Your email address will not be published. Answer: Cotton Question 2. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Also, you may want to use our Plastic Material Selection Guide or Interactive Thermoplastics Triangle to assist with the material selection process based on your application requirements. 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. HYDROMETER ANALYSIS OF SOIL – WHAT, WHY & HOW? Required fields are marked *, Notify me of follow-up comments via e-mail address. Name some artificial fibres. Plastics possess excellent insulating property, so used as electric insulators. Class-8 » Science. 3. Properties of Plastics as a Construction Material. Plastics, being organic in nature, are combustible. 10.Name the plastic, which deformed easily on heating and can be bent easily. You can follow me on Instagram. 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. 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 plastics, have low specific gravity, the average being 1.3 to 1.40. explains properties like plastic is nonreactive, plastic is light strong & durable, etc for CBSE Class 8 Science. The name Plastic is derived from the Greek word plastikos, which means able to be shaped. Properties of Materials. Plastic materials consist of long chain molecules (polymers). Following are the general properties of plastic. CBSE Science Class 8. 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. Please enable Cookies and reload the page. 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. PLASTIC 1. Plastics, generally, have low ductility and hence plastic structural members may fail without prior warning. 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. But the resistance to fire temperatue depends upon the plastic structure. This property depends upon variety of plastics used, for example, cellulose plastics are considerably affected by the presence of moisture, whereas polyvinyl chloride plastics offer high resistance to moisture. You may need to download version 2.0 now from the Chrome Web Store. Your email address will not be published. Metals and Non Metals Class 8 Science Chapter 4 as per NCERT Book used in CBSE and other Schools. Polyamides or Nylon is the major engineering and high performance thermoplastics class because of its good balance of properties. Cotton is a natural polymer known as cellulose which is composed of large number of glucose units. 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. Save my name, email, and website in this browser for the next time I comment. Your article have all the details and I appreciate you for this. Firstly, both the green and orange were very flexible, this … Polyamides contain repeating amide linkages i.e. Short Q&A: Q1: Differentiate between natural and artificial fibres. 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. Plastics easily maintain its shape and do not go under plastic deformations. Linear polymers and a combination of linear and cross-linked polymers come under thermoplastics. Prepared by :- MOHAMMAD SIDDIQ SALIM III SEM - II YR B-arch POORNIMA UNIVERSITY, jaipur 2. The properties of plastic are numerous. 1. 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 A) It is non-reactive. Polymer: The term polymer id derived from two greek words POLY meaning many and MER meaning units.Therefore polymer refers to combination of repeating units. Characteristics of Synthetic Fibres. Performance & security by Cloudflare, Please complete the security check to access. All operations like drilling, sawing, punching, clamping etc are carried out easily … Answer: Protein Question 3. (a)Thermoplastics (b)Thermosetting All operations like drilling, sawing, punching, clamping etc are carried out easily on plastics, just like wood. 3. This property of plasticity, often found in combination with other special properties such as low density, low electrical conductivity, transparency, and toughness, allows plastics to be made into a great variety of products. Cloudflare Ray ID: 60766ad3e945f999 11. Plastic material is essential for any construction. Name a natural fibre. https://www.youtube.com/watch?v=Tnvd9OUPu3A, Being subjected to creep under constant load. Hence the success of plastic as an engineering material for a particular purpose will depend upon the correct choice of the variety. Plastic is lighter than metals so they are also used in Aircrafts and Cars CBSE 8 Science. • FINENESS OF CEMENT BY BLAINES AIR PERMEABILITY METHOD (IS-4031-PART-2). –CO-NH–. HOW TO INCREASE REPETITION VALUE OF PLYWOOD? Typical reactions for chain assembling are polyaddition (continuous or step wise) and condensation polymer-ization (polycondensation) [1] (Figure 1.1).. Plastics don't corrode, though they can degrade in UV, a component of sunlight, and can be … Following are the general properties of plastics. • The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. Properties of plastics vary depending on the chemical composition, arrangements and the processing method of its subunits. By observing whether a reaction takes place, chemical properties of some plastics can be identified. I think this because of many reasons, these include the flexibility, hardness, density. 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