Effect of Two Kinds of C-methylcalix Resorcinarene Compounds on Thermo-oxidative Aging Resistance of NR and Its Mechanism
LI Hongqiang;ZHONG Yong;WU Wenjian;LAI Xuejun;ZENG Xingrong;South China University of Technology;
Two kinds of C-methylcalix resorcinarene(CMCR) compounds,CMCR-1 with ethoxymethyl side chains and CMCR-2 with thioether groups as well as hexylthiolmethyl side chains were applied in natural rubber(NR),the effects of the two kinds of CMCR compounds on the physical properties and thermo-oxidative aging resistance of NR vulcanizates were investigated,and the mechanism was also analyzed. The results showed that,when the addition level of CMCR-1 or CMCR-2 was 1 phr,the thermooxidative aging resistance of NR vulcanizates was effectively improved,and the physical properties changed little. NR vulcanizates with CMCR-2 possessed similar thermo-oxidative aging resistance as the NR vulcanizates with antioxidant 2246 S and better than NR vulcanizates with CMCR-1,which was mainly due to the good compatibility between CMCR-2 and NR matrix as well as the synergistic antioxidative effect between thioether groups and hindered phenol groups.
【CateGory Index】： TQ332