| Autor: |
Xia, Huimin, Gao, Hui, Sun, Qiqi, Wu, Fazong, Ge, Tengteng, Sui, Kun, Wang, Zhongwei, Song, Liang, Huang, Xiaowen, Yu, Qing |
| Předmět: |
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| Zdroj: |
Journal of Applied Polymer Science; 12/20/2020, Vol. 137 Issue 48, p1-9, 9p |
| Abstrakt: |
Puerarin, a natural compound, was used as multifunctional protector for polyethylene (PE) and polypropylene (PP). Firstly, puerarin and tetrakis(2,4‐di‐tert‐butylphenol)[1,1‐biphenyl]‐4,4′‐diylbisphosphite (PEPQ) could protect PE and PP against thermos‐oxidative degradation: after modification, the oxidation induction time (OIT) of increased ca. 4,160% (PE‐P1200‐P sample) and 130% (PP‐P1200‐P sample); the carbonyl index (CI) obtained through accelerated aging decreased ca. 58% (PE‐P1200‐P sample). Secondly, it is excited to find that puerarin and PEPQ could pretect PE agianst photooxidative degradation: CI value decreased ca. 35% after modification. Thridly, the coorperation of puerarin and PEPQ was also benefit for the processing stability: the change of melt flow rate (MFR) between first and fifth extrusions decreased ca. 83% (PE‐P1200‐P sample) and 99% (PP‐P1200‐P sample). Forthly, puerarin and PEPQ could still protect PE against degradation after five extrusions: the loss of tensile strength and elongation at break decreased ca. 96% and 95% after modification. Finally, the interaction of puerarin with PEPQ was discussed and the role of puerarin in protecting polyolefins was proposed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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