中国塑料 ›› 2009, Vol. 23 ›› Issue (08): 83-86 .DOI: 10.19491/j.issn.1001-9278.2009.08.018

• 助剂 • 上一篇    下一篇

迷迭香抗氧剂对聚丙烯的抗氧化作用

郑秋闿 刘飞跃 许凯 陈鸣才   

  1. 中国科学院广州化学研究所 中国科学院广州化学研究所
  • 收稿日期:2009-02-18 修回日期:2009-04-03 出版日期:2009-08-26 发布日期:2009-08-26

Antioxidation of Rosemary antioxidant in Polypropylene

  • Received:2009-02-18 Revised:2009-04-03 Online:2009-08-26 Published:2009-08-26

摘要: 通过高分子材料流变性能、自然老化实验前后力学性能、熔体流动性能的变化,研究了迷迭香抗氧剂(Rao)对聚丙烯(PP)体系的抗氧化性能的影响。结果表明,加入RaoPP体系的流变扭矩与原体系相比明显增大;150 d老化过程中,未加抗氧剂的PP的拉伸强度由32 MPa下降至24 MPa,熔体流动速率2.7 g/min上升至18.8 g/min30 d老化冲击强度由3kJ/m2下降至1 kJ/m2150 d老化过程中,添加RaoPP拉伸强度34 MPa下降至29 MPa熔体流动速率由2.5 g/min上升至5.3 g/min,经30 d老化冲击强度4 kJ/m2下降至3.2 kJ/m2说明添加RaoPP体系的抗氧化性能有显著提升。

关键词: 聚丙烯, 迷迭香抗氧剂, 天然抗氧剂, 自然老化法

Abstract: Effects of rosemary antioxidant (RAO) on the antioxidantive properties of PP were evaluated by comparing the rheological and mechanical properties before and after natural weathering. For neat PP, after 150d’s aging, the tensile strength decreased from 32 to 24Mpa, the melt flow rate increased from 2.7 to 18.8 g/min; after 30d’s aging, the impact strength decreased from 3 to 1 kJ/m2. For RAO containing PP at the same conditions, the tensile strength from 34MPa to 29Mpa, the melt flow rate increased from 2.5g/min to 5.3g/min, the impact strength decreased from 4 to 3.2 kJ/m2. In the melt torque determination, the torque of RAO containing system was obviously higher.

Key words: polypropylene, rosemary antioxidant, natural antioxidant, natural weathering test