摘要
采用硝酸和硫酸由碱法造纸黑液中酸析得到2种木质素,对其进行了粒径分布分析。研究了分别添加这2种木质素和硅烷偶联剂对三元乙丙橡胶(EPDM)性能的影响。结果表明,2种木质素具有较小的中位径和较大的比表面积,加入EPDM橡胶中,比硅烷偶联剂更能改善其力学性能;当加入1.5%(基于100 g橡胶)硝酸盐木质素时,EPDM橡胶的拉伸强度、断裂伸长率和肖A硬度分别提高了21.42%、22.55%和8;傅里叶红外光谱分析(FTIR)和扫描电子显微镜(SEM)结果证实木质素对橡胶有补强作用;而热失重(TG)结果说明木质素和硅烷偶联剂一样均能提高EPDM橡胶的热稳定性;木质素替代硅烷偶联剂用于EPDM橡胶,可改善其性能,降低生产成本,有较好的应用前景。
Two types of lignins were obtained from alkaline pulping black liquors by acidulation using nitric acid and sulphuric acid,and their particle-size distributions were analyzed.A comparative investigation was conducted for the properties of ethylene-propylene-diene-monomer(EPDM)rubbers with the two types of lignins and silane-coupling agent.The results indicated that the two types of lignins exhitibted a smaller value of D 50 and a bigger specific surface area.The incorporation of lignin-coupling agents improved the mechanical performances of EPDM rubber more significantly than the silane-coupling agent.The tensile strength,elongation at break and hardness of EPDM rubbers increased by 21.42%,22.55%and 8 degree with the addition of 1.5 phr nitrate lignin(based 100 g rubber).The Fourier-transform infrared spectroscopy(FTIR)analysis and scanning electron microscopic(SEM)observation indicated that the lignins played a role in the reinforcement of EPDM rubber.Thermogravimetric analysis revealed that the lignins and silane-coupling agents improved the thermal stability of EPDM rubbers.The lignins could be used to replace the silane-coupling agent for modification of EPDM rubbers in a cost-effective way and therefore exhibited good application potential.
作者
严光宇
徐鸽
YAN Guangyu;XU Ge(Changzhou College of Information Technology,Changzhou 213164,China;School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2019年第11期78-82,共5页
China Plastics
关键词
三元乙丙橡胶
造纸黑液木质素
硅烷偶联剂
表征
ethylene-propylene-diene-monomer rubber
lignins from pulping black liquor
silane-coupling agent
characterization
