The role of model fatty acid and protein on thermal aging and ozone resistance of peroxide vulcanized natural rubber

被引:0
作者
Narueporn Payungwong
Surakit Tuampoemsab
Porntip Rojruthai
Jitladda Sakdapipanich
机构
[1] Mahidol University,Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science
[2] King Mongkut’s University of Technology North Bangkok,Division of Polymer Engineering Technology, Department of Mechanical Engineering Technology, College of Industrial Technology
[3] King Mongkut’s University of Technology North Bangkok,Division of Chemical Industrial Process and Environment, Faculty of Science, Energy and Environment
来源
Journal of Rubber Research | 2021年 / 24卷
关键词
Natural rubber; Thermal ageing resistance; Ozone resistance; Fatty acids; Amino acids;
D O I
暂无
中图分类号
学科分类号
摘要
Natural rubber (NR) contains cis-1,4-polyisoprene and many kinds of non-rubber components, e.g., proteins, lipids and phospholipids, which are believed to affect the properties of NR. Oxidative degradation is one of the problems for rubber performance, which shorten the service life of the product. To overcome this problem, the influence of fatty acids and proteins on the cure properties, heat-ageing behaviours, and ozone resistance of NR vulcanizates were investigated. The peroxide vulcanization was chosen to avoid the effect of essential fatty acid and proteins. The purified NR, deproteinized NR (DPNR) and lipids-removed NR (LRNR) were mixed with model fatty acid (stearic acid) and amino acid (alanine). It was found that the cure behaviour of these mixed samples showed almost the same trend. After removing proteins, the rate of oxidative degradation was faster than that of the lipid-removal samples. Lower lipid content would result in less oxidative degradation of the rubber. These findings can infer that the endogenous proteins in NR act as natural antioxidants, while the endogenous lipids are pro-oxidants.
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页码:543 / 553
页数:10
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