Class 8 Exam > Class 8 Videos > What are Thermoplastics? - Synthetic Fibres and Plastics, Class 8 Science
What are Thermoplastics? - Synthetic Fibres and Plastics, Class 8 Science Video Lecture
FAQs on What are Thermoplastics? - Synthetic Fibres and Plastics, Class 8 Science Video Lecture
| 1. What are thermoplastics? |  |
Ans. Thermoplastics are a type of synthetic materials that can be melted and re-molded multiple times without any significant change in their properties. They are polymers composed of long chains of molecules that can be easily softened by heating and hardened by cooling.
| 2. What are the characteristics of thermoplastics? | |
Ans. Thermoplastics have several characteristics that make them useful in various applications. They have a high strength-to-weight ratio, are flexible, have good impact resistance, and are resistant to chemicals and moisture. Additionally, thermoplastics can be easily processed using methods like injection molding, extrusion, and blow molding.
| 3. Give examples of commonly used thermoplastics. | |
Ans. Some commonly used thermoplastics include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), and polyethylene terephthalate (PET). These thermoplastics are widely used in industries such as packaging, automotive, construction, and electronics.
| 4. How are thermoplastics different from thermosetting plastics? | |
Ans. Thermoplastics and thermosetting plastics differ in their behavior when exposed to heat. Thermoplastics can be melted and re-molded multiple times without any significant change in their properties. In contrast, thermosetting plastics undergo a chemical reaction when heated and harden irreversibly. Once thermosetting plastics are molded and hardened, they cannot be re-melted or re-shaped.
| 5. What are the advantages of using thermoplastics? | |
Ans. There are several advantages of using thermoplastics. They can be easily recycled, which helps in reducing waste and promoting sustainability. Thermoplastics also have a lower processing temperature compared to thermosetting plastics, resulting in energy savings during manufacturing. Additionally, their versatility, lightweight nature, and resistance to chemicals make them suitable for a wide range of applications.
Text Transcript from Video
force category of plastics is called the
thermoplastics
when we add hot water to a plastic
bottle it gets deformed
such plastic which gets deformed easily
on heating and can be bent easily are
known as thermoplastics polythene and
PVC are examples of thermoplastics
polythene is the most widely used
plastic its primary use is in packaging
PVC is used for making plumbing gutters
house siding enclosures for computers
and other electronic gear
these are used for manufacturing toys
combs
and various types of containers
thermoplastics generally have a linear
or branched macromolecular structure
one of the characteristic features of
thermoplastic is that it can be molded
again after being molded once a
thermoplastic may be repeatedly heated
and cooled upon heating the plastic
softens upon cooling the plastic hardens
thermoplastics
when we add hot water to a plastic
bottle it gets deformed
such plastic which gets deformed easily
on heating and can be bent easily are
known as thermoplastics polythene and
PVC are examples of thermoplastics
polythene is the most widely used
plastic its primary use is in packaging
PVC is used for making plumbing gutters
house siding enclosures for computers
and other electronic gear
these are used for manufacturing toys
combs
and various types of containers
thermoplastics generally have a linear
or branched macromolecular structure
one of the characteristic features of
thermoplastic is that it can be molded
again after being molded once a
thermoplastic may be repeatedly heated
and cooled upon heating the plastic
softens upon cooling the plastic hardens
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Nov 24, 2024 Last updated |
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