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<p>Carboxylated natural rubber-(XNR)/acrylonitrile butadiene rubber (XNBR) reinforced Carbon black (CB)-Silanized Silica (SS) compositions were prepared and cured with sulfur(S) and peroxide (DCP) at 160&#xa0;°C separately. The cure, chemical and mechanical properties etc. were systematically studied. A low content of XNBR in the blend (BL) resulted in better physico-mechanical properties. The best composition KC3 (30 phr XNBR and 70 phr XNR-Sulfur cured) recorded a bound rubber content, BR (%) of 37.5% with lower <i>t</i><sub><i>90</i></sub>(high cure rate) compared to KC6(50phr XNBR and 50phr XNR-DCP cured), which recorded BR (%) ~ 17.5%. Interestingly, KC6 recorded the highest crosslinking density (<i>N</i>), torques (M<sub>H</sub> and ∆M) and hardness. For instance, KC6 recorded over 109, 98, 230, 35 and 1151% increments in M<sub>H</sub>, ∆M, modulus at 300% (M300), hardness (Shore A) and <i>N</i> respectively compared to KC3. However, KC3 exhibited 28, 68, 240%, and 1,399,900% increments in wear resistance, stress, strain (%) and fatigue respectively, as compared to KC6. While the improvement in KC3 was due to the presence of stronger network structures like —BL—S<sub>x</sub>—BL—CB—S—SS—BL in addition to interactions like hydrogen (—C ≡ N----H—O) and polar (<sup>ẟ+</sup>C ≡ N----O<sup>ẟ+</sup>—H)), that of KC6 was mainly linked to weak and physical networks.</p>

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Preparation and characterization of High-Performance Carboxylated-NR/NBR reinforced with silanized Silica-Carbon black: A potential material for automobile tire tread design

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Bismark Mensah,
  • Elsie Effah Kaufmann,
  • Maxwell KariKari,
  • Ebenezer Annan,
  • Kutu Precious Yao,
  • Emmanuel Essien,
  • Samuel Younge,
  • Tsatsu Nukunya

摘要

Carboxylated natural rubber-(XNR)/acrylonitrile butadiene rubber (XNBR) reinforced Carbon black (CB)-Silanized Silica (SS) compositions were prepared and cured with sulfur(S) and peroxide (DCP) at 160 °C separately. The cure, chemical and mechanical properties etc. were systematically studied. A low content of XNBR in the blend (BL) resulted in better physico-mechanical properties. The best composition KC3 (30 phr XNBR and 70 phr XNR-Sulfur cured) recorded a bound rubber content, BR (%) of 37.5% with lower t90(high cure rate) compared to KC6(50phr XNBR and 50phr XNR-DCP cured), which recorded BR (%) ~ 17.5%. Interestingly, KC6 recorded the highest crosslinking density (N), torques (MH and ∆M) and hardness. For instance, KC6 recorded over 109, 98, 230, 35 and 1151% increments in MH, ∆M, modulus at 300% (M300), hardness (Shore A) and N respectively compared to KC3. However, KC3 exhibited 28, 68, 240%, and 1,399,900% increments in wear resistance, stress, strain (%) and fatigue respectively, as compared to KC6. While the improvement in KC3 was due to the presence of stronger network structures like —BL—Sx—BL—CB—S—SS—BL in addition to interactions like hydrogen (—C ≡ N----H—O) and polar (ẟ+C ≡ N----Oẟ+—H)), that of KC6 was mainly linked to weak and physical networks.