Polymer Solutions

Polymer Solutions

University

9 Qs

quiz-placeholder

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Polymer Solutions

Polymer Solutions

Assessment

Quiz

Other

University

Hard

Created by

Inmaculada García

Used 2+ times

FREE Resource

9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The immiscible blends exhibit_______

Excellent mechanical properties

Poor mechanical properties

Poor chemical properties

Intermediate chemical properties

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1.       For amorphous and semi-crystalline polymers, mixing leads to the formation of____

Mechanical blends

Solution-cast blends

Solution-cast blends

Chemical blends

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Polymers are dissolved in common solvent to give

Chemical blends

Latex blends

Solution-cast blends

Mechanical blends

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1.       The physical mixture of two or more polymers that are not linked by covalent bonds is called

Polymerisation

Dendrimer

Polyblend

Multiblend

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the thermodynamic relation frequently used by chemists to determine if a reaction will be spontaneous?

The Boltzmann Relation

The Gibbs free energy equation

The First Law of Thermodynamics

Go ask Jerry Falwell

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1.       Are most blends of polymers miscible in the absence of strong interactions, such as hydrogen bonds?

Yes

No

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why are most blends of polymers immiscible?

The enthalpy of mixing two polymers is often a large, positive number

There is a large decrease in the entropy of the system

There is a very little entropy gained by mixing two polymers and they often have a positive enthalpy of mixing

The ghost of Paul Flory hates miscible blends and makes most of them immiscible

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What USUALLY happens to the mechanical and optical properties of a polymer blend if the components show a significant degree of immiscibility and there is no compatibilizer?

The properties display a synergistic increase

The properties are often poor

Phase separation does not affect these properties

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

There are several methods of measuring the glass transition(s) of a polymer blend, such as DSC and DMA. How many glass transitions would you expect to see in two component miscible polymer blend? How many glass transitions would you expect to see in a two component immiscible blend (with significant phase separation)?

One broad glass transition in the miscible blend and two glass transitions in an immiscible blend

One broad glass transition in the immiscible blend and two glass transitions in an miscible blend

Two glass transitions, regardless of whether there was phase separation or not