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http://dx.doi.org/10.7317/pk.2013.37.2.156

Effect of Phenolic Antioxidants System on Yellowing of Amorphous Poly-α-olefin  

Kim, Si-Yong (Department of Polymer Science, Kyungpook National University)
Kim, Ho-Gyum (Department of Polymer Science, Kyungpook National University)
Park, Sang-Cheol (Department of Polymer Science, Kyungpook National University)
Min, Kyung-Eun (Department of Polymer Science, Kyungpook National University)
Publication Information
Polymer(Korea) / v.37, no.2, 2013 , pp. 156-161 More about this Journal
Abstract
Phenolic antioxidants are effective stabilizers that provide excellent long-term heat stability by preventing thermo-oxidative degradation during processing and service life. However, under a selected set of circumstances, certain types of phenolics have been susceptible to discoloration due to prolonged storage in an environment containing oxides of nitrogen. It is investigated that the effect of addition of secondary antioxidant and chemical structure of primary antioxidant on discoloration of amorphous poly-${\alpha}$-olefin (APAO), which is especially prone to be decomposed in high processing temperature. From the result, it is concluded that a higher level of steric hindrance of phenolic antioxidant provided by long alkyl chain allows a more enhanced synergic effect with secondary antioxidant.
Keywords
antioxidant; polyolefins; discoloration; NOx; thermal stability;
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