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APPENDIX B:GENERAL PROPERTIES AND DATA ONELASTOMERS AND PLASTICS

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Appendix B: General Properties and Data on Elastomers and Plastics 175Table B.10 True Stress at Break of Selected Melt-Mixed Rubber-Plastic BlendsaRubber Plastic True stress at break (MPa)IIR Polypropylene 26EPDM Polypropylene 26NR Polypropylene 16NBR Polypropylene 23EPDM Polyethylene 27NBR Polyethylene 13NBR Poly(tetramethy1ene terephthalate) 27IIR Polystyrene 2.3BR Polystyrene 4.1IIR S A N 5.0NBR S A N 10.5IIR PMMA 3.6aThe compositions were 6040 nd 5050 rubber-plasticweight ratio. The stress at the break isthe product of the ultimate extension ratio.

EPDM Polystyrene 3.7

Table B.ll Properties of Various Types of Elastomer CompositionsPartially Completelyvulcanized vulcanized Ester-ether

EPDMPoly- EPDMPoly- copolymerpropylene propylene Neoprene thermoplasticblend" blendb vulcanizate elastome?

~~ ~~

Shore A hardnessTensile strength (MPa)

77 80 80 926.6 9.7 9.7 25.5

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