Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (10): 128-133.doi: 1000-565X(2012)10-0128-06

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Antiaging Effect of Vitamin C-Rare Earth Complex on Natural Rubber /Carbon Black Composites

Luo Yuan-fang1  Yang Chao1  Jia Zhi-xin1  Jia De-min1  Chen Jun2  Zheng De2   

  1. 1. School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Guangdong Winner Functional Materials Co.,Ltd.,Foshan 528521,Guangdong,China
  • Received:2012-07-10 Online:2012-10-25 Published:2012-09-01
  • Contact: 贾志欣(1980-) ，男，博士，副研究员，主要从事高分子改性与复合材料研究． E-mail: zxjia@scut．edu．cn E-mail:psyfluo@ scut.edu.cn
  • About author:罗远芳(1954-) ，女，教授，博士生导师，主要从事高分子改性与复合材料研究．
  • Supported by:

    国家"863”计划项目( 2010AA03A406) ; 国家自然科学基金青年基金资助项目( 51003031) ; 国家"973”计划前期研究专项资助( 2010CB635109)

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Abstract:

A novel rare earth complex was prepared from lanthanum ( La) and vitamin C and was used as a new type of antioxidant in natural rubber /carbon black ( NR/CB) composites. Then,the effects of the vitamin C-rare earth complex on the curing characteristics of NR/CB compounds and the mechanical properties of NR/CB vulcanizates were investigated. Moreover,by means of FT-IR and according to the retention of mechanical properties and the variation of surface morphology,the effects of the rare earth complex on the antiaging properties of the NR/CB vulcanizates were also analyzed in detail and were compared with those of the commonly-used rubber antioxidants 4010NA,RD and MB. The results show that ( 1) the rare earth complex can accelerate the vulcanization of the NR/ CB compounds to a certain degree and improve the mechanical properties of the NR/CB vulcanizates; ( 2) the rare earth complex has a good antiaging effect on the NR/CB vulcanizates; ( 3) the thermo-oxidative aging resistance and UV aging resistance of the rare earth complex are close to those of 4010NA and RD and are superior to those of MB; and ( 4) the ozone aging resistance of the rare earth complex is particularly strong for the NR/CB vulcanizates,which is superior to those of RD and MB as well as to those of 4010NA with an excellent ozone aging resistance.

Key words: vitamin C, rare earth complex, natural rubber, carbon black, composites, thermo-oxidative aging, ultraviolet aging, ozone aging