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The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
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SBR Vulcanizates Filled with Modified Ground Tire Rubber
Katarzyna Klajn1, Tomasz Gozdek1, Dariusz M Bieliński1
1Institute of Polymer & Dye Technology, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland.
Materials (Basel, Switzerland)
|July 24, 2021
Summary
Surface modification of ground tire rubber (GTR) improves vulcanizate properties. Modified GTR enhances stiffness and crosslink density, but can increase abrasive wear while reducing friction.
Area of Science:
- Materials Science
- Polymer Chemistry
Background:
- Ground tire rubber (GTR) is a cost-effective filler for rubber vulcanizates.
- Poor interfacial adhesion between unmodified GTR and rubber matrices compromises mechanical properties.
Purpose of the Study:
- To evaluate novel surface modification methods for GTR.
- To investigate the impact of modified GTR on vulcanizate properties.
Main Methods:
- GTR surface modification via sulfuric acid (A), silane (M), or hybrid (H) treatments.
- Analysis of GTR surface properties (energy, area, morphology).
- Characterization of vulcanizates (crosslink density, mechanical, tribological).
Main Results:
- Modified GTR significantly enhances vulcanizate stiffness and crosslink density compared to virgin GTR.
- Silane modification (12 phr) and hybrid treatment (25 phr) showed the most pronounced effects.
- Modified GTR addition (10 phr replacement) reduced friction but increased abrasive wear.
Conclusions:
- Surface modification is crucial for improving GTR compatibility in rubber matrices.
- Optimized GTR modification offers a pathway to enhanced vulcanizate performance.
- Trade-offs exist between friction reduction and wear resistance with modified GTR.
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