中国塑料 ›› 2019, Vol. 33 ›› Issue (11): 78-82.DOI: 10.19491/j.issn.1001-9278.2019.11.015

• 助剂 • 上一篇    下一篇

造纸黑液木质素作为EPDM橡胶偶联剂的研究

严光宇1,徐鸽2   

  1. 1. 常州信息职业技术学院 2. 常州大学石油化工学院
  • 收稿日期:2019-06-27 修回日期:2019-07-28 出版日期:2019-11-26 发布日期:2019-12-27

Investigation on Lignins from Pulping Black Liquor as Coupling Agent for EPDM

YAN Guangyu1, XU Ge2   

  1. 1.Changzhou College of Information Technology,Changzhou 213164,China;
    2.School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)
  • Received:2019-06-27 Revised:2019-07-28 Online:2019-11-26 Published:2019-12-27

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。

关键词: 三元乙丙橡胶, 造纸黑液木质素, 硅烷偶联剂, 表征

Abstract: 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 D50 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.

Key words: ethylene-propylene-diene-monomer rubber, lignins from pulping black liquor, silane coupling agent, characterization

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