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Impact of recovered carbon black inorganic impurities on crosslinking and in-rubber performance

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Project progress (in years): 0 20 40 0 4 8 Tor que / dN M Time/ min

Torque increase indicates

curing/crosslinking of compound.

Impact of recovered carbon black inorganic impurities

on crosslinking and in-rubber performance

Cluster 06: Composites, project T16005a

University of Twente Department of Elastomer Technology and Engineering,

7522LW Enschede, The Netherlands.

06.09

A. Anjum

1

, A. Burkhart

2

, K. Efimov

2

, C. Recker

2

, W. Dierkes

1

, A. Blume

1

1

University of Twente, Enschede, The Netherlands

2

Continental Reifen Deutschland GmbH, Hannover, Germany

Contact: a.anjum@utwente.nl

Hardness

Pyrolysis 0 250 500 750 0 4 8 12 Str e s s / MPa Strain/ % Truck Car Mix 0 20 40 60 0 4 8 Tor que / dN m Time/ min Similar stress-strain

properties Different curing behavior

Carbon, Silica,

Sulfur

Oil

Use

Waste

Recycling

with sulfur

Elemental mapping indicated sulfur present on silica surface

For the first time, the active sulfur presence in recovered carbon black was shown by the torque increase indicating curing of

compounds without curing agent (sulfur)

Different cure behavior by varying ash content is elucidated as

synergistic effect of silica and active sulfur attached to its surface

Most sulfur is attached to silica surface

Recovered

carbon black

+ Carbon black

Influence on in-rubber properties ???

Truck Car Mix

15% 25% 20%

Gas

Conclusion

Elemental mapping Stress- strain behavior

Curing behavior

Active sulfur

from

inorganics?

Inorganics

(Silica, Sulfur, Zinc)

Tire manufacturing

without sulfur 1http://www.parkerliveonline.com/2019/08/08/road-works/ 1 Fillers Carbon black Silica Rubber Additives inorganic organic Curing agent Sulfur

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