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<p>The application of diesel, which is a key energy source, in cold climates is limited by its poor low-temperature flowability. Addressing this critical issue, this study designed and synthesized a series of novel comb shaped pour point depressants. This work showed how to synthesize and characterize three innovative copolymers: binary systems comprising tetradecyl methacrylate (C<sub>14</sub>MC) with either dioctyl maleate (DOM) or vinyl benzoate (VB), and C<sub>14</sub>MC-DOM, C<sub>14</sub>MC-VB and C<sub>14</sub>MC-DOM-VB were synthesized by integrating the three structural units mentioned above. The outcomes of the experiment show that adding the ternary copolymers(C<sub>14</sub>MC-DOM-VB), particularly with a molar composition of 15:1:1 and the addition amount of 2000&#xa0;ppm, improves the cold flow characteristics of diesel significantly, as shown by a decrease of 21&#xa0;°C in solidification point and 12&#xa0;°C in cold filter plugging point, respectively. Mechanistic investigations suggest that the comb-like structure and inclusion of benzene rings within the ternary copolymers furnish a multitude of nucleation sites, thereby more effectively disrupting the formation of extensive wax crystals. These mechanistic insights are substantiated by an array of analytical techniques, including rheologic analysis, differential scanning calorimetry and polarizing optical microscopy.</p>

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Effects of comb polyester copolymers on the cold performance of diesel

  • 期刊论文

  • 发表日期：

    2025年1月11日

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  • Wen-jing Zhu,
  • Jia-hao Chen,
  • Zong-qing Bai,
  • Wen-tong Zang,
  • Yu-ze Mao,
  • Hua-lin Lin,
  • Sheng Han

摘要

The application of diesel, which is a key energy source, in cold climates is limited by its poor low-temperature flowability. Addressing this critical issue, this study designed and synthesized a series of novel comb shaped pour point depressants. This work showed how to synthesize and characterize three innovative copolymers: binary systems comprising tetradecyl methacrylate (C14MC) with either dioctyl maleate (DOM) or vinyl benzoate (VB), and C14MC-DOM, C14MC-VB and C14MC-DOM-VB were synthesized by integrating the three structural units mentioned above. The outcomes of the experiment show that adding the ternary copolymers(C14MC-DOM-VB), particularly with a molar composition of 15:1:1 and the addition amount of 2000 ppm, improves the cold flow characteristics of diesel significantly, as shown by a decrease of 21 °C in solidification point and 12 °C in cold filter plugging point, respectively. Mechanistic investigations suggest that the comb-like structure and inclusion of benzene rings within the ternary copolymers furnish a multitude of nucleation sites, thereby more effectively disrupting the formation of extensive wax crystals. These mechanistic insights are substantiated by an array of analytical techniques, including rheologic analysis, differential scanning calorimetry and polarizing optical microscopy.