Materials Selection Deskbook 2011 Part 13 ppt

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Appendix
B:
General
Properties and Data
on
Elastomers and Plastics
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Appendix
B:
General Properties
and
Data on Elastomers and Plastics
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Appendix
B:

General Properties and Data on
Elastomers
and
Plastics
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Appendix
B:
General Properties and Data on Elastomers and Plastics
175
Table
B.10
True Stress at Break
of
Selected Melt-Mixed Rubber-Plastic Blendsa
Rubber Plastic True stress at break (MPa)
IIR
Polypropylene 26
EPDM Polypropylene 26
NR
Polypropylene 16
NBR Polypropylene 23
EPDM Polyethylene 27
NBR Polyethylene 13
NBR Poly(tetramethy1ene terephthalate) 27
IIR Polystyrene 2.3
BR Polystyrene 4.1
IIR

SAN
5.0
NBR
SAN
10.5
IIR PMMA 3.6
aThe compositions were
6040
and
5050
rubber-plastic weight ratio. The stress at the break is
the product
of
the ultimate extension ratio.
EPDM Polystyrene
3.7
Table
B.ll
Properties
of
Various Types
of
Elastomer Compositions
Partially Completely
vulcanized vulcanized Ester-ether
EPDMPoly- EPDMPoly- copolymer
propylene propylene Neoprene thermoplastic
blend" blendb vulcanizate elastome?
~~ ~~
Shore A hardness

Tensile strength (MPa)
Ultimate elongation
(%)
Volume swell in ASTM
No.
3
Oil (74 hr at
100°C)
(%)
Compression set (method
B: 22 hr at l00OC)
(%)
Use temperature ("C)
Type
of
processing"
77
80
80
92
200
400 400
450
Disintegrated 50
35
30
6.6
9.7 9.7 25.5
70 39
35

33
100 125 110 125
TP
TP
cv
TP
aTPR-1700
(Uniroyal).
bSantoprene (Monsanto).
'Hytrel (DuPont).
dTP, thermoplastic;
CV,
conventional vulcanizate.
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Selection
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Appendix
B:
General Properties and Data on Elastomers
and
Plastics
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Appendix
B:
General Properties and Data
on
Elastomers
and
Plastics
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Appendix
B:
General
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Data
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Elastomers
and
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