Logarithm of the relaxation modulus versus temperature for crystalline isostatic (curve A), lightly crosslinked atactic (curve B), and amorphous (curve C) polystyrene is depicted at the figure below. Relaxation modulus, E,(10) (MPa) 104 103 10² 10 1 10-1 10-2 10-3 50 Temperature (°F) 150 200 250 300 350 400 450 To 100 150 Temperature (°C) A B C 200 106 105 104 10³ 10² 10 1 250 Relaxation modulus (psi) With the help of this figure choose schematic strain-time plots for the following polystyrene materials at the specified temperature: Amorphous at 180°C
Logarithm of the relaxation modulus versus temperature for crystalline isostatic (curve A), lightly crosslinked atactic (curve B), and amorphous (curve C) polystyrene is depicted at the figure below. Relaxation modulus, E,(10) (MPa) 104 103 10² 10 1 10-1 10-2 10-3 50 Temperature (°F) 150 200 250 300 350 400 450 To 100 150 Temperature (°C) A B C 200 106 105 104 10³ 10² 10 1 250 Relaxation modulus (psi) With the help of this figure choose schematic strain-time plots for the following polystyrene materials at the specified temperature: Amorphous at 180°C
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:Logarithm of the relaxation modulus versus temperature for crystalline isostatic (curve A), lightly
crosslinked atactic (curve B), and amorphous (curve C) polystyrene is depicted at the figure below.
Relaxation modulus, E,(10) (MPa)
104
10³
10²
10
10-1
10-2
10-3
50
Temperature (°F)
150 200 250 300 350 400 450
Tg!
100
150
Temperature (°C)
A
B
C
200
T
106
105
104
10³
10
%
1
250
O
Relaxation modulus (psi)
With the help of this figure choose schematic strain-time plots for the following polystyrene
materials at the specified temperature: Amorphous at 180°C
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