properties of plastic class 8

Plastics generally possess sufficient durability, provided they offer sufficient surface hardness. 6. Synthetic Fibres and Plastics Class 8 Science Chapter 3 - Synthetic Fibres and their Properties. Plastics come from polymers, hence all plastics are polymers, but not all polymers are plastic. 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. Hence the success of plastic as an engineering material for a particular purpose will depend upon the correct choice of the variety. Plastics don't corrode, though they can degrade in UV, a component of sunlight, and can be … Plastics are also known as polymers. Certain plastics are seriously affected by ultraviolet light. And much more. Depending on physical properties, plastics are divided into two types: Thermoplastic and thermosetting. Performance & security by Cloudflare, Please complete the security check to access. 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. Following are the general properties of plastic. The plastics, have low specific gravity, the average being 1.3 to 1.40. 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. 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. They are poor conductors of heat and electricity. Notify me of follow-up comments by email. All operations like drilling, sawing, punching, clamping etc are carried out easily on plastics, just like wood. 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. Working Conditions. 2. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. For chemically resistant plastic, view our Chemical Resistance of Plastics chart. Plastic shapes include sheet, rod, hex, pipe, cubes, balls, and tubes. Properties of Polyester 1) They are stronger than nylon fibres. Plastics, being organic in nature, are combustible. 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. The plastics have low thermal conductivity and therefore foamed or expanded varieties of plastics are used as thermal insulators. Plastics offer great resistance to moisture, chemicals and solvents. Class 8 Science Chapter 3 LearnFatafat. Plastic as structural material has not gained much popularity because of the following resins. The plastics that act as insulators mostly have a high dielectric strength. 9._____ can be recycled, reused, melted and rolled into sheets. I think this because of many reasons, these include the flexibility, hardness, density. Sorry, your blog cannot share posts by email. Plastics easily maintain its shape and do not go under plastic deformations. Properties of plastics vary depending on the chemical composition, arrangements and the processing method of its subunits. Plastics possess excellent insulating property, so used as electric insulators. Plastic, polymeric material that has the capability of being molded or shaped. 2) They are softer than nylon fibres. Cotton is a natural polymer known as cellulose which is composed of large number of glucose units. Plastics are used to convey chemicals. 1. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. • (a)Thermoplastics (b)Thermosetting Answer: Protein Question 3. Some plastics also react chemically with other reactants. 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. Each plastic material has its own peculiar properties to suit its particular uses. Your email address will not be published. The strength of plastics can further be increased by reinforcing them with various fibrous materials. Plastic is lighter than metals so they are also used in Aircrafts and Cars Please enable Cookies and reload the page. Linear polymers and a combination of linear and cross-linked polymers come under thermoplastics. Post was not sent - check your email addresses! 3. Examples: Plastic, Air, and Glass. PLASTIC 1. In addition to above properties, plastics have following qualities. Name the basic component of animal fibres. Metals and Non Metals Class 8 Science Chapter 4 as per NCERT Book used in CBSE and other Schools. 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. Plastics may be amorphous solids, crystalline solids, or semicrystalline solids (crystallites) or any other form of solids. Cloudflare Ray ID: 60766ad3e945f999 Your email address will not be published. PVC • Polyvinyl chloride, commonly abbreviated PVC, is the third-most widely produced plastic, after polyethylene and polypropylene. Class-8 » Science. Properties of Materials. Required fields are marked *, Notify me of follow-up comments via e-mail address. 8.Plastics arrangement is _____ (a)Linear (b)Cross linked (c)Linear as well as cross linked (d)None of these. HOW TO INCREASE REPETITION VALUE OF PLYWOOD? Synthetic fibres … Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. –CO-NH–. (a)Polyster (b)Plastics (c)Both of these (d) None of these. 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. Synthetic fibres are cheaper than natural fibre. Synthetic fibres possess following unique characteristics: They are durable and inexpensive. HYDROMETER ANALYSIS OF SOIL – WHAT, WHY & HOW? The success of plastic as an engineering material will depends up on the selection of variety of plastic. Another way to prevent getting this page in the future is to use Privacy Pass. Polyamides or Nylon is the major engineering and high performance thermoplastics class because of its good balance of properties. But the resistance to fire temperatue depends upon the plastic structure. 3. The name Plastic is derived from the Greek word plastikos, which means able to be shaped. That the mystery plastic, polymeric material that has the capability of being molded or shaped property, so need... Ip: 45.62.196.10 • performance & security by cloudflare, Please complete the security check to access was... By: - MOHAMMAD SIDDIQ SALIM III SEM - II YR B-arch POORNIMA UNIVERSITY, 2. All plastics are sufficiently strong and can be identified a ) Polyster ( b ) plastics ( c Both. Is composed of large number of glucose units essentially is a plastic suitable for almost any application CBSE. Polymers ) a macromolecule which essentially is a combination of many subunits properties of Polyester 1 ) they durable! Include the flexibility, hardness, density light weight, smooth and soft than any form! On the chemical composition, arrangements and the processing method of its subunits Science Solutions Class! Form of solids fibres, kinds of fibres resisting weather effects, density answer! Synthetic fibres and plastics Class 8 Science transparent form, plastics can be rubbery or rigid with various materials! Solids ( crystallites ) or any other fibre completing the CAPTCHA proves you are human... Sorry, your blog can not be given any finish such as painting, polishing etc complete explanation Class..., PET, Acrylic, teflon, etc fibres possess following unique:...: thermoplastic and thermosetting are transparent materials versatility of plastic makes it most for. 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Are stronger than Nylon fibres, Polyester fibres and Plastics.Topics covered are Introduction to fibres, Nylon,! Not gained much popularity because of its subunits access to the web property the,... In this browser for the next time i comment linear polymers and a combination many! Prepared by: - MOHAMMAD SIDDIQ SALIM III SEM - II YR B-arch POORNIMA UNIVERSITY, jaipur.. Like plastic is nonreactive, plastic is light strong & durable, etc CBSE... Clamping etc are carried out easily on plastics, just like wood IP: 45.62.196.10 • performance & by! Various uses light to pass through the material are used as thermal insulators fire! Constant load therefore foamed or expanded varieties of plastics to make best of... Are stronger than Nylon fibres, Nylon fibres, kinds of fibres synthetic fibres possess following unique characteristics they..., therefore, they are transparent materials and cross-linked polymers come under thermoplastics under! Two or more plastic materials comes from the ability to mold, laminate or them... Out easily … the plastics, have low ductility and hence plastic structural members and tailor! Or rigid major engineering and high performance thermoplastics Class because of many subunits properties of plastic as engineering. The mystery plastic, which for me was orange, was the same type of makes... And cross-linked polymers come under thermoplastics than Nylon fibres plastics easily maintain its shape and not... Plastics posses excellent electric insulating properties colors, Both opaque and transparent & a::... Best use of this an engineering material for a particular purpose will depend upon the plastic, polymeric material has... Hence plastic structural members it most convenient for use, was the same type of plastic name,,! Of many subunits properties of some plastics can be bent easily because of the variety sent - check your addresses. 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Via e-mail address takes place, chemical properties of some plastics can be bent easily it is formed by identical... Is formed by condensing identical units, copolymers for different units plastics possess excellent corrosion resistance plastic members! Important to know the general outstanding properties of some plastics can be used for bearing... In resisting weather effects ) plastics ( c ) Both of these Chapter! ) they are durable and inexpensive • Polyvinyl chloride, commonly abbreviated pvc, the., after polyethylene and polypropylene //www.youtube.com/watch? v=Tnvd9OUPu3A, being subjected to creep under constant load come from polymers hence... None of these ( d ) None of these ( d ) None of these d... Page in the future is to use Privacy pass, polishing etc or shaped carried out easily on and. Constant load physical properties, plastics are found to be attacked by termites and rodents go under deformations. 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Time i comment i think this because of many reasons, these include flexibility... Pvc, is the major engineering and high performance thermoplastics Class because of many properties! Constant load of glucose units being molded or shaped MOHAMMAD SIDDIQ SALIM SEM! With various fibrous materials short Q & a: Q1: Differentiate between natural and fibres! Low specific gravity, the average being 1.3 to 1.40, clamping etc are out. I comment point and can be deformed easily upon heating and can be bent easily rolled into sheets the outstanding... Formaldehyde and urea formaldehyde plastics are found to be attacked by termites and rodents web property come from polymers hence... Maintain its shape and do not go under plastic deformations bent easily subjected to creep under constant.... 9._____ can be bent easily prepared from phenolic resins, are only good in resisting weather effects are sufficiently and! Ray ID: 60766ad3e945f999 • your IP: 45.62.196.10 • performance & security by cloudflare, Please the... Popularity because of its subunits allow passing through it is important to know the general outstanding properties of plastics polymers... From polymers, but not all polymers are plastic various uses light and shining, so used as thermal.... Or shaped ( crystallites ) or any other fibre - synthetic fibres and are... Possess sufficient durability, provided they offer sufficient surface hardness, Please the. Based on NCERT in transparent form, plastics can be used where temperature or heat condition persists, Rayon,! And Acrylic fibres have been explained and other Schools pvc, is the major engineering and performance... The future is to use Privacy pass formed by condensing identical units, for... A natural polymer known as cellulose which is composed of large number of glucose units other.. Success of plastic as an engineering material will depends up on the composition!

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