Non Metallic Eng Materials-Polymer

Multiple Choice

Which of the following is a NATURAL POLYMER?

• Rubber (latex)

• Polystyrene

• Polyethylene

• Nylon

Multiple Select

Which of the following is a SYNTHETIC POLYMER?

• cellulose

• latex

• polyethylene

• polystyrene

Multiple Select

Which of the following statements about homopolymers and copolymers is/are correct?

• Homopolymers are made from one type of monomer.

• Copolymers are made from two or more types of monomers.

• Homopolymers have a non-uniform structure.

• Copolymers are made from a single type of monomer.

Multiple Choice

Which type of copolymer has monomers arranged in a regular alternating pattern?

• Random Copolymer

• Block Copolymer

• Alternating Copolymer

• Graft Copolymer

Multiple Choice

Which of the following are examples of block copolymers?

• Polystyrene-b-Polybutadiene

• Polyethylene

• Nylon-6,6

• High-Impact Polystyrene (HIPS)

Drag and Drop

In the ​ ​

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stage, a reactive species is generated using an initiator.
In the propagation step, the active chain end continues to add ​

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, extending the ​

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.
In the ​

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step, the chain growth stop when two active chain ​

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.

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initiation

termination

combined

monomer

polymer chain

elastomer

latex

polystyrene

Multiple Select

Which aspects differentiate chain-growth polymerization from step-growth polymerization? Select all that apply.

• Reaction Mechanism

• Growth Pattern

• Molecular Weight Formation

• Reaction Speed

Multiple Choice

Which of the following is a correct classification of polymers based on their origin?

• Natural polymers and synthetic polymers

• Thermoplastics and thermosets

• Linear and branched polymers

• Elastomers and cross-linked polymers

Multiple Select

Which of the following are examples of natural polymers?

• Starch

• PVC

• Cellulose

• Nylon

Drag and Drop

​

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consists of long, straight chain of monomers.

​

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consists of chains with side branches.​
​

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is the polymers with covalent bonds between chains, formimg a network.

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Linear polymers

Branched polymers

Cross-linked polymers

monomer

elastomer

Multiple Choice

Match the following types of polymers with their correct characteristics:
1. Thermoplastics 2. Thermosets 3. Elastomers.
A. Stretchable and return to original shape B. Harden permanently after shaping C. Soften when heated, harden when cooled

• 1-C, 2-B, 3-A

• 1-A, 2-B, 3-C

• 1-B, 2-C, 3-A

• 1-C, 2-A, 3-B

Open Ended

List two common applications for thermoplastics :

Multiple Select

Which of the following are limitations of thermosets? Select all that may apply:

• Non-recyclable due to permanent cross-linked structure

• Often brittle, limiting use in flexible applications

• Can be reshaped and remelted multiple times

• Low resistance to deformation under heat

Multiple Choice

Which of the following statements best describes the main difference between thermoplastics and thermosets?

• Thermoplastics can be reshaped multiple times, while thermosets cannot be reshaped after curing.

• Thermoplastics are always brittle, while thermosets are always flexible.

• Thermoplastics are non-recyclable, while thermosets are easily recyclable.

• Thermoplastics harden permanently upon heating, while thermosets soften when heated.

Multiple Choice

What define the characteristic of elastomers?

• They are hard and brittle at room temperature

• They can stretch significantly and return to original shape

• They dissolve easily in solvents

• They have high load-bearing capacity

Multiple Choice

Which of the following are applications of silicone rubber?

• Medical devices

• Automotive tires

• Footwear

• Packaging materials

Drag and Drop

​ ​

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determine how a polymer behaves under physical forces, such as tension, compression, or bending.

​

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​ determine how a polymer behaves when exposed to an electric field.

​

​

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determine the polymer's resistance to environmental factors, chemicals, and solvents.

​

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describe how polymers behave when exposed to heat or temperature changes.

​

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determine how a polymer interacts with light.

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Mechanical Properties

Electrical Properties

Chemical Properties

Thermal Properties

Optical Properties

Multiple Choice

Which of the following is NOT an advantage of engineering polymers?

• Good mechanical and wear properties

• Chemical resistance

• Stable at moderate temperatures (100–250 °C)

• Highly brittle and easily fractured under load

Multiple Select

Which of the following are examples of engineering polymers? (Select all that apply)

• Polyethylene (PE)

• Polyether Ether Ketone (PEEK)

• Polystyrene (PS)

• Nylon (Polyamide)

Well done!