Influence of the chemical structure of para‐bridged group on the antioxidant behavior of hindered phenol antioxidants in HDPE resin,Journal of Applied Polymer Science

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Influence of the chemical structure of para‐bridged group on the antioxidant behavior of hindered phenol antioxidants in HDPE resin
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-06-15 , DOI: 10.1002/app.49505
Cuiqin Li ₁ , Yang Li ₁ , Xinxin Xia ₁ , Jin Huang _{1,

2} , Peng Sun ₁ , Na Zhang ₁ , Jun Wang ₁ , Feng Li ₁

Affiliation

A hindered phenol antioxidant with rigid para‐bridged group (antioxidant AP) was synthesized to study the effect of the chemical structure on the antioxidant properties of hindered phenol antioxidants in high density polyethylene (HDPE). Antioxidant behavior of series of hindered phenol antioxidants with different para‐bridged groups in HDPE resin was also investigated by the thermal oxidation experiment, the mobility test, and the long‐term accelerated thermal aging test. The results showed that the rigidity of para‐bridged group and the molecule size have the important influences on the antioxidant performance of hindered phenol antioxidants in the HDPE resin, and the antioxidant abilities of antioxidant AP and Irganox 1,330 with the aryl para‐bridged group was superior to Irganox 1,098 and 1.0G dendritic antioxidant with the alkyl para‐bridged group at the same testing conditions. Compared with the hindered phenol antioxidants with alkyl para‐bridged group, the hindered phenol antioxidants with aryl para‐bridged group have better thermal oxygen stability and less mobility in the HDPE resin. Irganox 1,010 with ester groups is prone to hydrolysis to increase the mobility rate in hot water and the migration resistance of hindered phenol antioxidants in n‐hexane. Moreover, the high content of phenolic OH group and the aryl para‐bridged group are favorable for improving the antioxidant performance of hindered phenol antioxidants.

中文翻译：

对桥基的化学结构对受阻酚抗氧化剂在HDPE树脂中抗氧化性能的影响

合成了具有刚性对桥基团的受阻酚抗氧化剂（抗氧化剂AP），以研究化学结构对受阻酚抗氧化剂在高密度聚乙烯（HDPE）中的抗氧化性能的影响。还通过热氧化实验，迁移率测试和长期加速热老化测试研究了HDPE树脂中具有不同对桥基的一系列受阻酚类抗氧化剂的抗氧化行为。结果表明，对-桥联基团的刚度和分子大小对受阻酚抗氧化剂在HDPE树脂中的抗氧化性能以及抗氧化剂AP和Irganox 1,330与芳基对芳烃的抗氧化能力具有重要影响。在相同的测试条件下，桥连基优于烷基对桥连基，而Irganox 1,098和1.0G树状抗氧化剂。与受阻酚抗氧化剂与烷基相比对-bridged组中，受阻酚抗氧化剂与芳基对位-bridged组具有在HDPE树脂具有更好的热稳定性氧和更少的移动性。具有酯基的Irganox 1,010易于水解，以增加在热水中的迁移率，并提高了受阻酚类抗氧化剂在正己烷中的迁移阻力。此外，酚羟基基团和芳基对桥基的高含量有利于改善受阻酚类抗氧化剂的抗氧化性能。

更新日期：2020-06-15

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