摘要
研究普通氧化锌和纳米氧化锌对天然橡胶硫化胶耐疲劳性能的影响。结果表明:普通氧化锌的粒径较大,不易发生团聚,但其本身颗粒大会导致硫化胶缺陷,而纳米氧化锌粒径较小,比表面积大,活性更好,但用量较大时易在硫化胶中团聚而形成微观空穴,二者均导致硫化胶在交变应力作用下产生裂纹;纳米氧化锌减量20%替代普通氧化锌,其既可在硫化胶中分散均匀,又不易形成微观空穴,且活化效果好,硫化胶的物理性能良好,耐疲劳性能优。
The influence of ordinary zinc oxide and nano-zinc oxide on the fatigue resistance of natural rubber(NR) was studied. The results showed that,ordinary zinc oxide had a larger particle size and usually did not agglomerate,but the large particles would cause defects in the vulcanizates. Nano-zinc oxide had a smaller particle size,larger specific surface area and better activity,but it was easy to agglomerate and form microscopic cavities in the vulcanizate if its dosage was large. Both ordinary zinc oxide and nano-zinc oxide could cause cracks in the vulcanized rubber under the action of alternating stress. It was found that when nano-zinc oxide was used to replace the ordinary zinc oxide in the compounds with a reduced amount by 20%,it was uniformly dispersed in the vulcanizates,did not form any microscopic cavity and provided a good activation effect. As a result,the physical properties of the vulcanizates were good and the fatigue resistance was excellent.
作者
王静
侯丹丹
张春生
童晓茜
危银涛
康振冉
王昊
WANG Jing;HOU Dandan;ZHANG Chunsheng;TONG Xiaoqian;WEI Yintao;KANG Zhenran;WANG Hao(Tsinghua University,Beijing 100084,China;Zhongce Rubber Group Co.,Ltd,Hangzhou 310018,China;E-Rubber Technology(Beijing)Co.,Ltd,Beijing 100083,China)
出处
《橡胶工业》
CAS
2021年第12期890-894,共5页
China Rubber Industry
基金
国家自然科学基金资助项目(52003142,11672148)。
