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[求助] Antioxidant behavior of a novel sulfur-bearing hindered pheno lic antioxidant

abstract
A novel sulfur-bear ing hindered pheno lic antioxidant with a mole cular weight of 130 5.9 (SAO) was
success fully sy nthesiz ed via thiol-a crylate M ichael addi tion reaction and its str ucture was clari fi ed by
nuclear magnetic resonance (N MR) and fou rier t ransform in frared spectra (FTIR). The short- term
oxidat ion induc tion tim e (OIT) of polypropylene (P P) compo unds obtai ned at 210C showed that the
OIT value of SAO-con tainin g PP was higher than that of PP using Chinox 1035 wit h a molecul ar weight of
6 42.9 as a stabil izer. Long-term accelerated thermal aging test of PP compou nds in an air oven at 150C,
however, exhib ited that the aging resistance of SAO-stabili zing PP was in ferior to that of 1035-containin g
PP, quite contrary to their respective short-term effec t on PP sta bilization . The pos sible reasons of this
contradiction were discu ssed from t he viewpoint of the antioxidan ts ’ molecul ar struc ture and the lim-itati ons of the OI T approach in lifetim e prediction

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  • 2013-12-16 20:28:18, 1.37 M

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Antioxidant behavior of a novel sulfur-bearing hindered phenolic antioxidant 一种新型含硫的受阻酚类抗氧化剂的抗氧化特性
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3楼2013-12-22 01:00:20
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★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
真强必胜: 金币+1, ok 2013-12-22 19:56:57
醒目(phu_grassman代发): 金币+25, thanks 2014-01-15 08:51:46
摘要
一种分子量为1305.9(SAO)的新型含硫受阻酚抗氧剂通过硫醇 - 丙烯酸酯的迈克尔加成反应成功地合成,其结构已通过核磁共振(N MR)和傅里叶变换红外光谱(FTIR)分析清楚。210℃得到的聚丙烯(PP)化合物短期氧化诱导时间(OIT)表明含聚丙烯的SAO  OIT值高于使用分子量为642.9的Chinox1035作为稳定剂合成的聚丙烯。然而,150℃在空气烘箱中i聚丙烯化合物长期加速的热老化试验表明SAO作为稳定剂合成聚丙烯的抗老化性能不如含Chinox1035聚丙烯,与短期稳定效应相反。这个矛盾的原因从抗氧化剂分子结构的观点和OIT方法的寿命预测变化局限性方面进行了讨论。
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2楼2013-12-16 21:35:23
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