Reinforcement of natural rubber latex with silica modified by cerium oxide: preparation and properties

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• 作者：Fuquan ZHANG ((张福全))^a ; Lusheng LIAO ((廖禄生))^a ; Yongzhou WANG ((王永周))^a ; Yueqiong WANG ((汪月琼))^a ; Honghai HUANG ((黄红海))^a ; Puwang LI ((李普旺))^a ; ^{puwangli@163.com" class="auth_mail" title="E-mail the corresponding author} ; Zheng PENG ((彭 政))^a ; ^{zpengcatas@126.com" class="auth_mail" title="E-mail the corresponding author} ; Rizhong ZENG ((曾日中))^b
• 关键词：cerium oxide ; silica ; natural rubber latex ; emulsion compound ; reinforcement ; aging-inhibiting property ; glass transition temperature ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：34
• 期：2
• 页码：221-226
• 全文大小：690 K

文摘

Variable masses of nano cerium oxide (CeOb>2b>) were added into nano silica (SiOb>2b>) to prepare the well-dispersed SiOb>2b>-CeOb>2b> suspension (SiOb>2b>-CeOb>2b>), cetyltrimethyl ammonium bromide (CTAB) was used to adjust the compatibility of SiOb>2b>-CeOb>2b> with rubber matrix, then SiOb>2b>-CeOb>2b> modified by CTAB and curing formulas were mixed with fresh natural rubber (NR) latex to prepare NR/SiOb>2b>-CeOb>2b> nanocomposites that contained 0-10 parts of CeOb>2b> by a new emulsion compounding method. The morphologies, cure characteristics, mechanical properties and thermal-oxidative stability of NR/SiOb>2b>-CeOb>2b> nanocomposites were investigated. The results revealed that the presence of CeOb>2b> in NR/SiOb>2b>-CeOb>2b> nanocomposites was favorable for enhancing the interaction between NR matrix and fillers, helped to get smaller SiOb>2b>-CeOb>2b> particles with narrower particle size distribution, further improved the crosslink densities and mechanical properties of NR/SiOb>2b>-CeOb>2b> nanocomposites vulcanizates. Meanwhile, the addition of CeOb>2b> increased the active energy at least 4.66%, obviously improved the thermal-oxidative aging-inhibiting properties of NR/SiOb>2b>-CeOb>2b> nanocomposites. Additionally, nanocomposites containing CeOb>2b> promoted Tb>gb> shift to high temperature direction, causing the nanocomposites featured higher tanδ at 0 °C and lower tanδ at 60 °C and exhibited comparable wet grip and lower rolling resistance when NR/SiOb>2b>-CeOb>2b> nanocomposites were used in tire tread compound.