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http://dx.doi.org/10.7317/pk.2015.39.2.240

Observation of Interfacial Adhesion in Silica-NR Compound by Using Bifunctional Silane Coupling Agent  

Lee, Jong-Young (Dong Ah Tire & Rubber Co., Ltd.)
Kim, Sung Min (Dong Ah Tire & Rubber Co., Ltd.)
Kim, Kwang-Jea (Dong Ah Tire & Rubber Co., Ltd.)
Publication Information
Polymer(Korea) / v.39, no.2, 2015 , pp. 240-246 More about this Journal
Abstract
Formation of a strong 3-dimensional interfacial network structure via chemical reaction between hydroxyl group on silica surface and NR chain by the addition of bis(triethoxysilylpropyl)tetrasulfide (TESPT) into silica-filled NR compound was observed by using Py-GC/MS and SEM. Addition of TESPT into silica-filled NR compound decreased scorch time ($t_{10}$) due to increased sulfur content, and reduced cure rate index (CRI) via continuous reaction between sulfur atoms in TESPT, which acted as a sulfur donor, and activators and/or accelerators. Addition of TESPT in the compound improved processability and mechanical properties of the compound. Overall, we observed that the addition of TESPT into the silica-filled NR compound formed a silica-TESPT-NR network, and thus the degree of crosslinking was increased resulting in improved mechanical properties.
Keywords
interfacial adhesion observation; silica-silane-NR network; mechanical properties; Py-GC/MS;
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