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首页> 外文期刊>Journal of Applied Polymer Science >Extraction resistance and mechanism of a macromolecular hindered phenol antioxidant in natural rubber
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Extraction resistance and mechanism of a macromolecular hindered phenol antioxidant in natural rubber

机译：大分子阻尼酚抗氧化剂在天然橡胶中的抗药性及机理

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Due to low thermal stability, poor migration, and extraction resistances, the antioxidant with low molecular weight is easy to physically lose during processing and long-term service, and its applications are severely restricted. To increase the molecular weight of antioxidant is one of the promising methods to overcome such drawbacks. In this study, the extraction resistance of a macromolecular antioxidant, namely polyhydroxylated polybutadiene containing thioether binding 2,2-thiobis(4-methyl-6-tert-butylphenol) (PHPBT-b-TPH), was investigated by extraction resistance test and equilibrium swelling experiment. The results exhibited that the PHPBT-b-TPH offered much better extraction resistance in natural rubber (NR) than the low molecular weight antioxidant TPH. In addition, the extraction resistance of hydroxyl-terminated polybutadiene (HTPB), polyethylene glycol (PEG), and polypropylene glycol (PPG) in NR were also compared to study the extraction mechanism of the PHPBT-b-TPH. It was found that the higher molecular weight of PHPBT-b-TPH and the co-vulcanization between PHPBT-b-TPH and NR were the main reasons for the excellent extraction resistance. (C) 2017 Wiley Periodicals, Inc.
机译：由于稳定性低，迁移不良和萃取电阻，在加工和长期服务期间，具有低分子量的抗氧化剂易于物理丢失，其应用严重限制。为了增加抗氧化剂的分子量是克服这种缺点的有希望的方法之一。在该研究中，通过提取抗性试验和平衡，研究了大分子抗氧化剂，即含有硫醚结合2,2,2-硫替二手（4-甲基-6-叔丁基苯酚）（PHPBT-B-TPH）的多羟基化聚丁二烯的萃取抗性肿胀实验。结果表明，PHPBT-B-TPH在天然橡胶（NR）中提供比低分子量抗氧化剂TPH更好的提取抗性。此外，还比较了NR中羟基封端的聚丁二烯（HTPB），聚乙二醇（PEG）和聚丙二醇（PPG）的萃取性，以研究PHPBT-B-TPH的萃取机制。发现pHPBT-B-TPH的较高分子量和PHPBT-B-TPH和NR之间的共硫化是优异的萃取抗性的主要原因。 （c）2017 Wiley期刊，Inc。

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