SHORT ANSWER TYPE QUESTION
1. why is nylon used to make swimsuits?
LONG ANSWER TYPE QUESTION
1. why is rayon called artificial silk?
2. What r the sources of raw materials for synthetic fibres?
3. why r ropes made of nylons used in fishing nets and cranes?
4. differentiate between thermosetting plastics and thermoplastic.
Answers
Answer:
SHORT ANSWER TYPE QUESTION
Because of its strength nylon is by far the most popular swimwear fabric. Swimwear made out of nylon is very lightweight and dry fast, which makes it ideal for aquatic use.
LONG ANSWER TYPE QUESTION
1. Rayon is called artificial silk because it is produced from naturally occurring polymers and looks like silk. It is woven like silk fibers but is man-made, unlike silk. It is prepared from the natural raw material called cellulose. The kind of rayon fibers which imitate the feel and texture of natural silk is therefore termed as 'artificial silk'.
2. Synthetic fibers are made from synthesized polymers of small molecules. The compounds that are used to make these fibers come from raw materials such as petroleum-based chemicals or petrochemicals. These materials are polymerized into a chemical that bonds two adjacent carbon atoms.
3. Ropes made of nylon and polyester are commonly used in cranes and elevators because It is very strong, fairly elastic and lightweight.
4. Thermoplastic plastics Thermosetting plastics
1. Thermoplastic can be easily bent. 1. Thermosetting plastics cannot 2. Softens on heating be easily bent. If forced to bend,
3. Can be moulded and reshaped they will break.
2. Do not soften on heating
3. Cannot be moulded and
reshaped.
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Answer:
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