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BSP3153 POLYMERS CHAPTER 1

Total questions: 51

Worksheet time: 3hrs 33mins

Name
Class
Date
1.

Explain the difference between thermoplastics, thermosets, and elastomers.

4 lines
2.

Hydrocarbon polymers are defined as polymers with which elements in their chain?

4 lines
3.

Explain why polyethylene and polypropylene are classified as hydrocarbon polymers.

4 lines
4.

Explain the difference between homopolymers and copolymers.

4 lines
5.

Describe how copolymers might combine the characteristics and properties of the mixed monomers.

4 lines
6.

Discuss the significance of using mixed monomers in the formation of copolymers.

4 lines
7.

Explain how the properties of polymers are influenced by the details of their chain structure. Include at least three specific structural features that affect polymer properties.

4 lines
8.

List and briefly describe four types of copolymers.

4 lines
9.

What is a random copolymer? Provide an example of its monomer arrangement.

4 lines
10.

Describe the role of stereochemistry or tacticity in determining polymer properties.

4 lines
11.

Explain the significance of geometric isomerization in diene type polymers.

4 lines
12.

Why is the sequence of monomer units important in copolymers?

4 lines
13.

Explain the structural difference between a block copolymer and an alternating copolymer. Use examples in your explanation.

4 lines
14.

Describe the structure of a graft copolymer and explain how it differs from block and alternating copolymers.

4 lines
15.

List and briefly explain three factors that influence the production of graft copolymer architecture.

4 lines
16.

Given the polymer sequence AAAAAAAABBBBBBB, identify the type of copolymer and justify your answer.

4 lines
17.

Given the polymer sequence ABABABABABABABABA, identify the type of copolymer and justify your answer.

4 lines
18.

Explain why the arrangement of monomer segments is important in determining the properties of copolymers.

4 lines
19.

Describe how hydrophobicity and hydrophilicity of monomers can affect the structure and properties of graft copolymers.

4 lines
20.

Polymers can be classified based on their chain structure. What are the three main types of polymer chain structures?

4 lines
21.

Examine the diagram showing linear, branched, and crosslinked polymer chains. Describe one key visual difference between a linear polymer and a crosslinked polymer.

4 lines
22.

Polyethylene (PE) can exist in linear, branched, and crosslinked forms. Based on the chemical structure diagrams, explain how the structure of branched PE differs from linear PE.

4 lines
23.

Refer to the chemical structure diagrams of polyethylene. What structural feature allows crosslinked PE to form a network?

4 lines
24.

When a linear polymer is stretched, what happens to its chains and its ability to return to its original form?

4 lines
25.

How does the behavior of a cross-linked polymer differ from a linear polymer when both are stretched and then released?

4 lines
26.

Explain the role of cross-links in the mechanical properties of polymers.

4 lines
27.

Describe how the chain structure of a polymer affects its physical properties, using examples from linear, branched, and crosslinked polyethylene.

4 lines
28.

Based on the diagrams and explanations, why might crosslinked polymers be preferred for applications requiring shape memory or resilience?

4 lines
29.

Examine the image showing granules of polyethylene (PE) and tubing made from crosslinked polyethylene (PE). Explain the difference between standard PE granules and crosslinked PE tubing in terms of their structure and typical applications.

4 lines
30.

Based on the visual comparison of granules PE and tubing (crosslinked PE), discuss how the process of crosslinking affects the properties and uses of polyethylene.

4 lines
31.

Explain what is meant by chemical bonding and describe the energy change that occurs when two or more atoms attract each other.

4 lines
32.

Analyze the diagram showing bonding energy as a function of distance. Describe what happens to the system energy as two atoms approach each other and form a bond.

4 lines
33.

Define ionic bonding and explain how it occurs between atoms.

4 lines
34.

Using the diagram of sodium and chlorine atoms, explain the process of ionic bond formation between Na and Cl.

4 lines
35.

Describe metallic bonding and the role of electrons in this type of bond.

4 lines
36.

Interpret the diagram showing the formation of metallic bonds in iron. Explain how the sea of electrons contributes to the bonding.

4 lines
37.

Define covalent bonding and explain how electron sharing leads to bond formation.

4 lines
38.

Using the diagram of carbon and hydrogen atoms, describe how covalent bonds are formed in a molecule containing these elements.

4 lines
39.

What is secondary bonding, and how does it differ from ionic, metallic, and covalent bonds? Give examples.

4 lines
40.

Analyze the diagram showing hydrogen bonds and induced dipole bonds. Explain the nature of these secondary bonds and how they form between molecules.

4 lines
41.

Explain the difference between homopolymers and copolymers in terms of the types of repeating units (RUs) present in their molecular chains.

4 lines
42.

List one example of a homopolymer and one example of a copolymer.

4 lines
43.

Describe the possible structures of homopolymers.

4 lines
44.

Describe the possible structures of copolymers.

4 lines
45.

Name and briefly describe the three chemical configurations of repeating units (RU) in polymers.

4 lines
46.

Explain how stereoregularity affects the physical properties of polymers, such as chain folding and crystallinity.

4 lines
47.

Define the terms 'stereo-regular' and 'stereo-irregular' in the context of polymer molecular structure, and state the consequences for polymer morphology.

4 lines
48.

Refer to the diagram showing three polymer structures labeled isotactic, syndiotactic, and atactic. Which type of polymer has all its side groups oriented on the same side of the polymer chain?

4 lines
49.

Based on the diagram of polymer tacticity, which type of polymer has side groups that alternate in orientation along the polymer chain?

4 lines
50.

In the diagram of polymer structures, which type of polymer displays a random orientation of its side groups?

4 lines
51.

Explain how the arrangement of side groups in isotactic, syndiotactic, and atactic polymers affects their physical properties.

4 lines