Journal
KGK-KAUTSCHUK GUMMI KUNSTSTOFFE
Volume 61, Issue 3, Pages 85-91Publisher
DR ALFRED HUTHIG VERLAG GMBH
Keywords
tensile strength; strain-induced crystallization; natural rubber; X-ray diffraction
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The tensile strength of rubber depends on a combination of contributions in particular on the finite extensibility of chain segments between network points and on strain-induced crystallization. In order to achieve high tensile strength at high strain at break, we optimized the composition and processing parameters to gain high molecular flexibility by the cure conditions, to acquire high flexibility of sulfur bridges by the accelerator, and to increase the modulus level without losing rubber molecule flexibility by carbon black. As a result, our formula performed a tensile strength of 42.5 MPa at 25 degrees C under ISO-37, as officially measured by the Society of Rubber Industry, Japan, in 2004.
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