Journal
POLYMER DEGRADATION AND STABILITY
Volume 148, Issue -, Pages 50-55Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2018.01.004
Keywords
Natural rubber; Nano ZnO; Crosslink density; Crosslink structure; Thermal aging
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Funding
- National Research Foundation of Korea [2016R1A2B4008389] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The effects of ZnO particle size on crosslinking and thermal aging behavior of natural rubber (NR) were investigated. NR vulcanizates filled with nano ZnO allowed higher crosslink density, lower polysulfide crosslink, and stronger mechanical properties than those filled with micro ZnO. After thermal aging, NR filled with nano ZnO exhibited much more stable chemical and mechanical properties. The high crosslink density as well as the formation of more stable mono- and di-sulfidic crosslinks was attributed to the good dispersion and high surface area of the nano ZnO.
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