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Updated: Jan 26, 2026

Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
Phase Morphology of NR/SBR Blends: Effect of Curing Temperature and Curing Time
Darja Klat1, Hossein Ali Karimi-Varzaneh2, Jorge Lacayo-Pineda3
1Continental Reifen Deutschland GmbH, Jaedekamp 30, 30419 Hanover, Germany. darja.klat@conti.de.
Abstract:
The morphology of natural rubber/styrene⁻butadiene rubber blends (NR/SBR) was characterized by atomic force microscopy (AFM), with regard to curing temperature and curing time. The changes in blend morphology were directly visualized by AFM which confirmed the results of indirect experiments like differential scanning calorimetry (DSC). Comparing the phase morphologies at different curing temperatures indicated that the domain size of SBR increases with temperature at lower curing temperatures, but domain growing stops at the latest scorch time. This effect is explained by longer scorch times at low curing temperatures which facilitate phase separation, while the short scorch times at higher temperatures meant that the coalescence of SBR phases was hindered by cross-linking between polymer chains.
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