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研究了填充弓弦大麻纤维(BHF)填料和炭黑的天然橡胶(NR)胶料的硫化特性和物理性能。结果表明,随着填料用量增大,硫化胶的焦烧时间和硫化时间缩短,而最大转矩增大;硫化胶的拉断伸长率和回弹值降低,而硬度、定伸应力、耐磨性能及密度提高。当填料用量为40份时,两种硫化胶的拉伸强度达到最大值。填充炭黑的NR硫化胶的拉伸强度约为填充BHF填料硫化胶的1.5倍,这可能是由BHF填料较高的水分含量和较大的粒径所致,但是填充BHF填料的NR硫化胶具有更高的硬度。
The vulcanization and physical properties of a natural rubber (NR) compound filled with bowstring hemp fiber (BHF) filler and carbon black were investigated. The results show that the scorch time and vulcanization time of vulcanizates decrease with the increase of filler content, while the maximum torque increases. The elongation at break and rebound value of vulcanizates decrease, while the hardness, Grinding performance and density increase. When the filler is 40 parts, the tensile strength of the two vulcanizates reaches the maximum value. The tensile strength of the NR vulcanizate filled with carbon black is about 1.5 times that of the BHF filler vulcanizate, which may be due to the higher moisture content and larger particle size of the BHF filler, but the NR vulcanizate filled with BHF filler Has a higher hardness.