Luo Xue, Li Mengyan, Fu Guliang, Yu Rentong, Liao Jianhe
School of Materials Science & Engineering, Hainan University, Haikou 570228, China.
Int J Mol Sci. 2025 Apr 5;26(7):3410. doi: 10.3390/ijms26073410.
Natural rubber (NR) has long been plagued by inferior oil resistance and poor thermal degradation at high temperatures. Despite these limitations, NR remains the most widely used elastomer to date. Fluorine-containing compounds have demonstrated excellent oil resistance and thermal stability. However, they generally exhibit poor compatibility with non-polar polymers. After blending, macroscopic phase separation cannot be easily suppressed, leading to the deterioration of the material's properties. In this study, fluorination modification was performed using hydroxyl-terminated polybutadiene, and the resulting fluorine-modified polybutadiene (3F-PBu-3F) was incorporated into natural rubber. Following sulfur curing, homogeneous phase morphologies were observed in all vulcanizates, which significantly differed from those of previously reported NR/polybutadiene vulcanizates. Additionally, the oil resistance and thermal stability of the NR/3F-PBu-3F vulcanizates were effectively enhanced.
天然橡胶（NR）长期以来一直受到耐油性差和高温下热降解性能不佳的困扰。尽管存在这些局限性，但迄今为止，NR仍然是使用最广泛的弹性体。含氟化合物已显示出优异的耐油性和热稳定性。然而，它们通常与非极性聚合物的相容性较差。共混后，宏观相分离不易被抑制，导致材料性能恶化。在本研究中，使用端羟基聚丁二烯进行氟化改性，并将所得的氟改性聚丁二烯（3F-PBu-3F）加入天然橡胶中。经过硫磺硫化后，在所有硫化胶中均观察到均匀的相形态，这与先前报道的NR/聚丁二烯硫化胶有显著差异。此外，NR/3F-PBu-3F硫化胶的耐油性和热稳定性得到了有效提高。
