Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Polymer Engineering > Molecular Origin Of Polymer > Flashcards

Molecular Origin Of Polymer Flashcards

(47 cards)

Start Studying
1
Q

Molecules that have double, and triple covalent bonds that is each carbon atom is not bonded to the maximum (four) other atoms.

A

Unsaturated Molecules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

All bonds are single ones, and no new atoms may be joined without the removal of others that are already bonded.

A

Saturated Molecules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A molecule that combines with other molecules of the same or different type to form a polymer.

A

Monomer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

A low molecular weight polymer that contains at least two monomer units.

A

Oligomer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

It specifies the length of the polymer molecule.

A

Degree of Polymerization

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A dimensionless quantity given by the sum of the atomic weights in the molecular formula.

A

Molecular Weight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Enumeration.
Classification of Polymers.

A
  1. Based on Origin
  2. Based on Polymer Structure
  3. Based on Polymerization Mechanism
  4. According to Thermal Processing Behavior
  5. Based on Preparative Technique
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Enumeration.
Classification of Polymers based on origin.

A
  1. Natural
  2. Synthetic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does PET stands for?

A

Polyethylene Terephthalate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does HDPE stands for?

A

High-density Polyethylene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does PVC stands for?

A

Polyvinyl Chloride

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What does LDPE stands for?

A

Low-density Polyethylene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does PP stands for?

A

Polypropylene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does PS stands for?

A

Polystyrene

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Enumeration.
4 Classification based on Polymer structure.

A
  1. Linear
  2. Branched
  3. Cross-linked
  4. Network
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Comparison.
Linear, Branched, Cross-linked, Network

A
  1. Linear Polymers are those in which the repeat units are joined together end to end in single chains. These long chains are flexible and may be thought of as a mass of “spaghetti”.
  2. Branched Polymers have side chains or branches growing out from the main chain. The side chains or branches are made of the same repeating units as the main polymer chains.
  3. In cross-linked polymers, adjacent linear chains are joined one to another at various positions by covalent bonds. Crosslinks are tend to be permanent in nature.
  4. Network Polymers are multifunctional monomers forming three or more active covalent bonds make three dimensional networks.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Enumeration.
Classification based on Polymer structure.

A
  1. Amorphous
  2. Crystalline
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Comparison.
Amorphous, Crystalline.

A
  1. Amorphous polymers are polymers that have no crystalline regions and no uniformly packed molecules.
  2. Crystalline polymers exhibits a highly-ordered molecular structure, resulting in a repeating three-dimensional arrangement known as crystalline lattice.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

A measure of the degree of order or orientation in a crystal.

Study These Flashcards
A

Degree of Crystallinity

20
Q

Enumeration.
2 Classification Based in Polymer Structure (Monomer Composition).

Study These Flashcards
A
  1. Homopolymer
  2. Copolymer
21
Q

When all of the repeating units along a chain are of the same type.

22
Q

A polymer made up of more than one type of monomer unit.

23
Q

Representing two different mers by A and B.

Study These Flashcards
A

Random Copolymer

24
Q

The two mers alternate in a regular fashion along the polymer chain.

Study These Flashcards
A

Alternating Copolymer

25
A linear polymer with one or more long uninterrupted sequences of each mer in the chain.
Block Polymer
26
A branched copolymer with a backbone of one type of mer and one or more side chains of another mer.
Graft Copolymer
27
Enumeration. 3 Classification based on Polymer structure.
1. Fibers 2. Plastics 3. Elastomers
28
Linear polymers with high symmetry and high intermolecular forces that result usually from the presence of polar groups.
Fibers
29
Molecules with irregular structure, weak intermolecular attractive forces, and very flexible polymer chains.
Elastomers
30
A polymer typically modified with additives which can be molded or shaped under reasonable conditions of pressure and temperature.
Plastic
31
What does O stands for?
Bisphenol A
32
Enumeration. Classification based on Polymerization Mechanism.
1. Condensation Polymers 2. Addition Polymers
33
Formed from a series of reactions, often of condensation type, in which any two species can react at any time leading to a larger molecule.
Condensation Polymers
34
Produced by reactions in which monomers are added one after another to a rapidly growing chain.
Addition Polymers
35
Enumeration. Classification of Polymers according to thermal processing behavior.
1. Thermoplastics 2. Thermosets
36
Comparison. Thermoplastics, Thermosets.
1. Thermoplastics are plastics that soften when heated and become firm again when cooled. The heating and cooling may be repeated and the thermoplastic may be reformed. 2. Thermosets are plastics that soften when heated and can be molded but harden permanently. They decompose when reheated.
37
Enumeration. Classification based on Preparative Technique.
1. Bulk Polymerization 2. Solution Polymerization 3. Suspension Polymerization 4. Emulsion Polymerization
38
Polymerization where only the monomer (and possibly catalyst and initiator, but no solvent) is fed into the reactor.
Bulk Polymerization
39
It involves the polymerization of a monomer in a solvent in which both the monomer (reactant) and the polymer (product) are soluble.
Solution Polymerization
40
It refers to the polymerization in an aqueous medium with the monomer as the dispersed phase.
Suspension Polymerization
41
Similar to suspension polymerization, but the initiator is located in the aqueous phase (continuous phase) in contrast to the monomer (dispersed phase) in suspension polymerization.
Emulsion Polymerization
42
Enumeration. Bulk Properties of Polymers.
1. Tensile Strength 2. Young’s Modulus of Elasticity 3. Transport Properties 4. Pure Component Phase Behavior
43
Quantifies how much stress the material will endure before failing.
Tensile Strength
44
Quantifies the elasticity of the polymer.
Young’s Modulus of Elasticity
45
The ratio of rate of change of stress to strain.
Young’s Modulus of Elasticity.
46
A transition from a crystalline or semi-crystalline phase to a solid amorphous phase.
Melting Point
47
A crucial physical parameter for polymer manufacturing, processing, and use.
Glass Transition

Polymer Engineering (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions