NR1

NR2

NR3

Natural rubber

100

100

100

Stearic acid

1

1

1

Zinc oxide

4

4

4

Processing oil

10

10

10

Filler (Fs, CNTs, GNPs)

2

6

10

MBTS^a

2

2

2

TMTD^b

1

1

1

Vulkanox 4020^c

1

1

1

Sulphur

2

2

2