10 Questions
Which of the following is NOT mentioned as a polymer for electrical and electronic applications?
Polypropylene
Which property is NOT mentioned as a classification criterion for polymers?
Electrical conductivity
What is the process called by which polymers are formed by linking monomers through chemical reaction?
Polymerization
What is the functionality of a polymer?
The number of reactive sites that the monomer possesses
Which molding technique is mentioned in the text?
Injection molding
Match the following polymers with their applications:
Polyethene (LDPE, HDPE) = General-purpose polymer Poly(vinyl chloride) = Used in electrical and electronic applications Teflon = Used in non-stick cookware Bakelite = Used in electrical insulators
Match the following terms related to polymers with their definitions:
Polymer = A large molecule having high molecular mass formed by joining a repeating unit of smaller molecules Monomer = Small individual repeating unit or molecules Polymerization = Process by which polymers are formed by linking monomers through chemical reaction Functionality = The number of reactive sites that the monomer possesses
Match the following molding techniques with their definitions:
Injection Molding = A manufacturing process for producing parts by injecting molten material into a mold Compression Molding = A method of molding in which the molding material is first placed in an open, heated mold cavity
Match the following types of rubber with their definitions:
Vulcanised Rubber = A type of rubber that has been chemically modified to improve its properties Ebonite = A hard, dark-coloured material made by vulcanising natural rubber EPDM = A type of synthetic rubber that is used in many applications
Match the following conducting polymers with their applications:
Polyaniline = Used in electronic devices Polyacetylene = Used in solar cells Poly(phenylene vinylene) = Used in light-emitting diodes
Study Notes
Polymers for Electrical and Electronic Applications
- Polyimides, polyurethanes, and silicone resins are mentioned as polymers for electrical and electronic applications.
Classification of Polymers
- Polymers are classified based on their source, structure, and molecular forces.
Polymer Formation
- The process by which polymers are formed by linking monomers through chemical reactions is called polymerization.
Functionality of a Polymer
- The functionality of a polymer refers to the number of reactive groups present in a monomer molecule.
Molding Techniques
- Injection molding is mentioned as a molding technique.
Polymer Applications
- Polyimides are used in microelectronics and electrical insulation.
- Polyurethanes are used in electrical insulation and coatings.
- Silicone resins are used in electrical insulation and encapsulation.
Polymer-Related Terms and Definitions
- Thermoplastic: a type of polymer that can be melted and reformed multiple times.
- Thermoset: a type of polymer that cannot be melted and reformed.
Molding Techniques and Definitions
- Injection molding: a molding technique in which molten plastic is forced into a mold to form the desired shape.
Types of Rubber and Definitions
- Natural rubber: a type of rubber derived from natural sources.
- Synthetic rubber: a type of rubber derived from petroleum products.
Conducting Polymers and Applications
- Polyacetylene is used in batteries and photosensors.
- Polypyrrole is used in biosensors and electrochromic displays.
- Polythiophene is used in solar cells and electrochromic displays.
Test your knowledge on polymers used in electrical and electronic applications. Learn about the classification, properties, and applications of various polymers such as polyethene, poly(vinyl chloride), PMMA, polycarbonate, and more. Explore the world of conducting polymers like polyaniline, polyacetylene, and poly(phenylene vinylene).
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