摘要
根据Friedel-Crafts反应机理,以氧化铝(AlCl_3)作为催化剂,使芳纶纤维(AF)表面与液体橡胶(LIR)的端羟基发生接枝反应,对接枝后的AF及芳纶增强天然橡胶(AF/NR)复合材料进行了SEM、DMA、力学性能等分析。结果表明:AlCl_3/LIR接枝体系处理后,复合材料的界面粘合性能和力学性能有明显提高,定伸应力提高了9.76%,撕裂强度提高了8.08%;随着AlCl_3浓度的增大,300%定伸应力呈逐渐增大的趋势,当浓度为2%时,300%定伸应力达到最大值5.66MPa,DMA结果显示:浓度为2%的AlCl_3处理过的AF较未经AlCl_3处理过的AF对应的AF/NR复合材料的储能模量最大值提高了25.4%,损耗模量峰值提高了14.7%,损耗因子峰值降低了10.0%。
According to the Friedel-Crafts reaction mechanism,AlCl_3 as catalyst was used to make the grafting reaction between the surface of aramid fibers（AF）and terminal hydroxyl groups of liquid rubber.Besides,the grafted AF and AF reinforced natural rubber（NR）composites were tested with SEM,DMA and mechanical analysis.The results showed that interfacial adhesion properties and mechanical properties of the composite were significantly improved after treated with AlCl_3/LIR system.The results of DMA revealed that the value of storage modulus and loss modulus of AF/NR composite was enhanced,whereas the peak of loss factor was reduced.Moreover,300% modulus showed a trend of gradually increase with the increasing concentration of AlCl_3 solution,the 300% modulus reached 5.66 MPa especially when the concentration of AlCl_3 solution was 2%.
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第3期158-160,共3页
New Chemical Materials
基金
贵州省橡胶专项资助(2013)
关键词
接枝改性
傅克反应
芳纶纤维
天然橡胶
液体橡胶
graft modification
Friedel-Crafts reaction
aramid fiber
natural rubber
liquid rubber
