MatE 454 Jeopardy

Definitions

Polymer Solubility and

Thermo

$100 $100 $100$100$100

$200 $200 $200$200$200

$300 $300$300$300$300

$400 $400$400$400

$500 $500$500$500

Multi-component Materials

Polymer Transitions

Phase Continuity and

Diagrams

$400

$500

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Category:

Fracture Behavior

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A plot of compliance to this power versus crack length will result in a straight line for a

double cantilever beam specimen.

What is ...

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• 1/3 power

Cube root of specimen compliance plotted versus crack length

G 3P2ba

a* = a +

Correction for both shear deformation and root rotation by adding a length to a, where can be determined experimentally by plotting C1/3

Data Reduction (3)

E8P

Ba

h

3

E8P

Ba

h

3

G 12a2

EB2h3

C

2

3 2Eh3

16a4G 12a2

EB2h3

C

2

3 2Eh3

16a4

C P

8

EB

a

h

3

Eq. (2) = ...

C P

8

EB

a

h

3

Eq. (2) = ...

G 12a2

EB2h3 P 2

Eq. (1) G(C(a))= ...

G 12a2

EB2h3 P 2

Eq. (1) G(C(a))= ...

G 3P2aB

G 3P2aB

Polymers that are covalently linked end to

end.

What are ...

Definitions For $100

Block co-Polymers

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A material having two or more distinct constituent materials or phases with properties that are noticeably different from the

constituent properties

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A composite material

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List three types of composites based

on form of the reinforcement

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•Continuous Fiber•Short fibers or whiskers•Particulates•Flakes•Nanocomposites

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A technique that measures the difference in heat flow to a sample

and to a reference sample as a direct function of time or temperature under

heating cooling or isothermal conditions.

What is ...


Differential Scanning

Calorimetry

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In polymer blends, the shape and arrangement of the

phases

What is ...


Morphology

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This staining agent for TEM is often used to improve

contrast between the polymer phases

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Multicomponent Polymer Materials For $100

Osmium Tetroxide (OsO4)

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This scattering technique is useful for studying domain sizes in block copolymers,

blends, and nanocomposites from 5-100 nm

What is ...


Small-angle X-Ray Scattering

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The main assumption in the rule of mixtures for modulus

and

The main assumption in the inverse rule of mixtures

What are ...


For rule of mixtures: Iso-strain assumption (longitudinal load produces

equal strain in both fiber and matrix)

For inverse rule of mixtures: Iso-stress assumption (stress is the same in each

component)

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In the following Takayanagi Model, this is

the volume fraction of phase A

What is ...


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Volume Fraction of Phase A =

This equation defines a reinforcement efficiency to obtain a better estimate than the inverse rule of mixtures.

What is ...


Halpin-Tsai Equation

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f

fm

V

VPP

1

1

mf

mf

PP

PP

These are the two types of DSCs

What are ...

Polymer Transitions For $100

Power compensated and

Heat Flux

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Names of the five regions of viscoelastic behavior illustrated

below

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(1) Glassy state

(2) Glass transition

(3) Rubbery Plateau

(4) Rubbery Flow

(5) Liquid Flow Back toGame

Number of material constants to define elastic behavior for

an isotropic material

What is ...


2

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If two polymers are mixed forming one phase, then one sharp glass transition will be

observed at a temperature governed by this equation.

What is ...


Fox’s Equation

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2

2

1

11

ggg T

W

T

W

T

In dynamic mechanical analysis, tan δ, is defined by

this ratio.

What is ...


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E

E

tan

Out of phase modulus (loss modulus)

In phase modulus (storage modulus)

Some of the common morphologies in immiscible polymer blends and block

copolymers.

What are ...

Phase Continuity and Diagrams

For $100

•Spheres of Phase I in Phase II

•Cylinders of Phase I in Phase II

•Dual Phase Continuity

•Alternating Lamella

•Phase within a phase within a phase

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The relationship between viscosity and concentration

for phase continuity?

What is ...


For $200

Decreasing viscosity and increasing concentration of phase 1 relative to

phase 2 favors phase I being the continuous phase:

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X1

2

2

1

where if X>1, phase 1 is continuousX~1, dual phase continuity or phase inversionX<1, phase 2 is continuous

This type of phase behavior is most common for polymer

blends

What is ...


For $300

Lower Critical Solution Temperature

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The microstructure of blends in this region of the phase diagram will evolve following nucleation and

growth kinetics

What is ...


For $400

Area between spinodal and

binodal curves

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Spinodal (represents stability)

Binodal (represents equilibrium)

Blend will evolve following nucleation and growth kinetics

Blend will evolve following spinodal decomposition kinetics.

What is ...


For $500Consider the phase diagram below. This is the relationship between VI, VII, xI, xII, x

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)(

)(

1xx

xx

V

V II

II

I

)(

)(

1xx

xxV

II

III

)(

)(

III

III xx

xxV

Polymerization of monomer II in presence of monomer I

What is ...

Polymer Solubility and ThermoFor $100

Reaction Induced Phase Separation (RIPS)

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Represented by the circled terms in the Flory-Huggins Equation Below

What is ...


)1()1ln(

)1(ln AAA

B

AA

A

AM

NNkT

G

Entropy of Mixing ΔSm

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Given two polymers (and their solubility parameters), their molecular weights, their

composition in a blend, and the temperature of mixing; these equations would be used

to estimate miscibility.

What are ...


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)1()1ln(

)1(ln AAA

B

AA

A

AM

NNkT

G

RT

Vr2

211

)(

Molar volume

This technique can be used to estimate the solubility

parameter of a polymer based on the molecular formula of

the polymer repeat unit

What is ...


Small’s Method

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In a block co-polymer system, this is the effect of varying

composition

What is ...


Shape and packing of the microstructure (see below)

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MatE 454 Jeopardy

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