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Polybutadiene Rubber UBEPOL VCR®

Synthetic Rubber

1. Raw Polymer Properties

Grade VCR412 VCR617 VCR450 VCR800
Mooney viscosity ML1+4 ,100°C 45 62 39 40
n-Hexane insoluble *1 (wt%) 12 17 3.8 5.3
Microstructure *2 Cis (wt%) 98 98 98 98
Trans (wt%) 1 1 1 1
Vinyl (wt%) 1 1 1 1
Specific gravity (g/cm3) 0.91 0.91 0.91 0.91
Anti-Oxidant non-staining
Package 35kg bale
*1
SPB content in VCR
*2
Microstructure of matrix polymer

2. Compound Properties

Recipe : ASTM D3189
Grade VCR412 VCR617 VCR450 VCR800 BR150
Compound mooney viscosity ML1+4 ,100°C 71 98 60 61 62
Curing Characteristic ML (dN•m) 2.8 3.9 2.0 2.1 2.0
MH (dN•m) 13.8 15.7 10.1 10.1 10.1
Ts1 min. 1.9 1.6 3.0 3.0 3.0
Tc(50) min. 8.3 7.6 8.8 8.8 8.5
Tc(90) min. 12.2 10.8 12.4 12.6 11.7

3. Vulcanizate Propertie

Curing time ; 50 minutes
Grade VCR412 VCR617 VCR450 VCR800 BR150
Hardness Type A 75 81 66 66 64
100% modulus   MPa 4.6 6.3 2.8 2.9 2.4
200% modulus   MPa 11.0 13.7 7.2 7.4 6.5
300% modulus   MPa - - 12.9 13.1 12.5
Tensile strength   MPa 16.4 16.2 17.0 16.7 16.0
Elongation   % 290 250 390 380 380
Tear resistance   kN/m 62 65 59 61 56
Rebound BS % 50 46 52 49 57
Compression set   % 25 24 24 25 22
Heat build up ΔT °C 33 36 29 30 27
P.S % 12 13 9 9 8
Pico abrasion
resistance
  INDEX 249 260 238 230 209
Lambourn abrasion
resistance
slip rate
20%
INDEX 72 62 93 90 100
slip rate
60%
INDEX 67 59 92 88 100
Cut growth resistance
(Cut length ; from 2mm to 15mm)
cycles 28000 37000 12800 14000 4700
Cut generation *104cycles 14 7.7 >30 >30 27