Answer. PEX is a medium- to high-density polyethylene containing cross-link bonds introduced into the polymer structure, changing the thermoplastic into a thermoset. Is it thermoplastic or thermosetting plastic? Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. Two broad categories of plastic materials exist: thermoplastics and thermosets, which are differentiated based on their behaviors in the presence of heat. Plastic films are used in a wide variety of applications. You see polythene in all shapes and sizes. a) PVC b) Polythene c) Bakelite d) Polystyrene. 38. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Polyethylene (PE) is the most widely used thermoplastic polymer for fabricated parts and components. Polyethylene, light, versatile synthetic resin made from the polymerization of ethylene. It contains long-chain linear polymers and held together by weak Van der Waal forces. A thermoplastic is a material, usually, a plastic polymer, which becomes softer when heated and hard when cooled. Answered By . Polycot, Polywool, Terrycot ,Acrylic State whether the given statements are true or false. Thermosetting Plastic Advantages and Disadvantages. Fill in the blanks. How long will the footprints on the moon last? Thermosetting plastics are types of polymer which can not be remoulded if it gets moulded once. They tend to char and burn when heated, but they are resistant to much higher temperatures than thermosoftening plastics. What does contingent mean in real estate? Copyright © 2020 Multiply Media, LLC. Type of Thermosetting Plastic & Thermosetting Plastic Materials List. Polyethylene (PE), despite having the simplest basic structure of any polymer (a repetition of CH 2 units), is the largest tonnage plastics material. Polycot is made by mixing two types of fibres namely a) Silk + Cotton b) Polythene + cotton c) Silk + Polyester d) Polyester + Cotton. Write the full form of PVC. they can be softened by heating only once i.e. Previous question Next question. Thermoset plastics are frequently used for sealed products due to their resistance to deformation and are also among some of the most impact resistant plastics available. 1 kgf/cm 2 (gage) and 70°C. Correct answer is (a) Melamine Thermosetting polymers are made from various kinds of material that serve key roles and importance in the plastics fabrication industry. softening and hardening can be repeated again and again. An example of thermosetting Plastic is Bakelite. What are some samples of opening remarks for a Christmas party? Less flexible than LDPE. There fore thermosetting polymers cannot be remoulded. Answer. Polyethylene, polypropylene, … It is the most widely used plastic in the world, being made into products ranging from clear food wrap and shopping bags to detergent bottles and fuel tanks. One of the most common thermoset plastics is the laminate counter tops that are commonly found in kitchens or work spaces. Examples of thermoplastics include polythene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), nylons, etc. If you own a recently manufactured aquarium or terrarium, it’s likely made of acrylic plastic. Answer. Hence, option A is correct. Can be moulded into almost any form. These thin plastic membranes are used to separate areas or volumes, to hold items, to act as barriers, or as printable surfaces.. What is meant by polythene is a thermo plastic. It is used to make electrical switches and handles of utensils. Which is a thermosetting plastic? Acrylic – Acrylic is commonly used for consumer goods. Question is ⇒ _____ is a thermosetting plastic., Options are ⇒ (A) PVC, (B) Polythene, (C) Bakelite, (D) polystyrene, (E) , Leave your comments or Download question paper. What are the release dates for The Wonder Pets - 2006 Save the Ladybug? Agricultural Sciences3AMWED / September 20202. Differentiate Novolac and Bakelite on the basis of structure. 22. Thermosetting. d) Polystyrene. Visually speaking, thermoplastic chains are clumped together like a ball of tangled yarn. (a). At room temperature, they are available in the form as liquids. Common salt is generally not produced commonly by _____ method from brine. Answer/Explanation. toppr. Strictly speaking, thermoset polyurethanes are NOT considered a "plastic". plastics may be recycled that means may be moulded into another It is used for plastic bags, stretch films because of its clear and crystalline nature. Answer: (d) 4. Answer: d Explaination: (d) LDP is used for making squeeze bottles, flexible hose pipe. 9. When did organ music become associated with baseball? An example of thermoplastic is Polythene. Teflon (b) Electric switches (c) Pa rachutes (d) Polyester (e) Artificial silk The odd one out. The polymer which is used in manufacture of squeeze bottles is (a) Polystyrene (b) Teflon (c) Polypropene (d) Low density polythene. The main physical difference is how they respond to high temperatures. 7 kgf/cm 2 and 700°C. shape on melting. Q1. Why don't libraries smell like bookstores? Signs: a notice, warning, or advertisement, that is displayed for public view. such plastics may be recycled that means may be moulded into another shape on melting. High-density polyethylene or polyethylene high-density is a thermoplastic polymer produced from the monomer ethylene. Thermoplastics are 100% recyclable. Plastics are a wide range of synthetic or semi-synthetic materials, that usually use a polymers as a main ingredient. 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