Discoloration Mechanisms of Natural Rubber and Its Control

Color is an important indicator for evaluating the quality of natural rubber (NR). Light-colored standard rubbers are widely used in high-grade products and have high economic value. This paper first introduces the history and test standards of the standard light-colored rubber. The origin of color...

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Bibliographic Details
Published in:Polymers 2022-02, Vol.14 (4), p.764
Main Authors: Lv, Mingzhe, Fang, Lei, Yu, Heping, Rojruthai, Porntip, Sakdapipanich, Jitladda
Format: Article
Language:English
Subjects:
Aging
Biosynthesis
Browning
Carotenoids
Color
Discoloration
Hydrocarbons
Light
Lipids
Maillard reaction
Natural rubber
Oxidation
Polyphenol oxidase
Polyphenols
Review
Rubber
Test methods
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Summary:Color is an important indicator for evaluating the quality of natural rubber (NR). Light-colored standard rubbers are widely used in high-grade products and have high economic value. This paper first introduces the history and test standards of the standard light-colored rubber. The origin of color deepening in NR processing, color substances, and its biosynthetic pathway are reviewed. Then, the discoloration mechanism of NR is studied from the perspectives of enzymatic browning (caused by polyphenol oxidase and polyphenols) and non-enzymatic browning (including Maillard reaction and lipid oxidation). Finally, the strategies to control the discoloration of NR will be described.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym14040764