| Effect of Wet Process Zinc Oxide on Properties of NR |
| Received:October 08, 2019 Revised:October 25, 2019 |
| DOI：10.12136/j.issn.1000-890X.2020.08.0596 |
| Key Words: wet process zinc oxide；NR；curing characteristic；physical property；dynamic mechanical property |
| Author Name | Affiliation | E-mail | | ZHAI Junxue* | Qingdao University of Science & Technology | zhaijunxue@qust.edu.cn | | DU Changze | Qingdao University of Science & Technology | | | ZHAI Jinting | Qingdao University of Science & Technology | | | YUAN Zhaokui | Qingdao University of Science & Technology | | | LI Gangchen | Qingdao University of Science & Technology | | | XIAO Jianbin | Qingdao University of Science & Technology | | | ZHAO Shugao | Qingdao University of Science & Technology | |
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| Abstract: |
| The effects of wet process zinc oxide FF and HR on the properties of natural rubber（NR） were investigated and compared with common zinc oxide （indirect method）. The results showed that，compared with common zinc oxide，the activation and reinforcement of wet process zinc oxide were significant. The scorch time and t90 of NR compound were shortened and Fmax was improved by adding wet process zinc oxide. When the amount of zinc oxide was the same，the order of tensile strength of NR vulcanizates from high to low were as follows: FF，HR，common zinc oxide. The order of modulus at definite elongation from high to low were as follows: HR，FF，common zinc oxide，while the order of elongation at break was the opposite. The Payne effect of NR compound with common zinc oxide was weak，the storage modulus of NR vulcanizate with zinc oxide increased，and the loss factor decreased with the increase of zinc oxide content. |
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