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Abstract：
In the present work, statistical analysis (16 processing conditions and 2 virgin unmodified samples) is performed to study the influence of antioxidants (AOs) during acrylonitrile-butadiene-styrene terpolymer (ABS) melt-blending (220 °C) on the degradation of the polybutadiene (PB) rich phase, the oxidation onset temperature (OOT), the oxidation peak temperature (OP), and the yellowing index (YI). Predictive equations are constructed, with a focus on three commercial AOs (two primary: Irganox 1076 and 245; and one secondary: Irgafos 168) and two commercial ABS types (mass- and emulsion-polymerized). Fourier transform infrared spectroscopy (FTIR) results indicate that the nitrile absorption peak at 2237 cm-1 is recommended as reference peak to identify chemical changes in the PB content. The melt processing of unmodified ABSs promotes a reduction in OOT and OP, and promotes an increase in the YI. ABS obtained by mass polymerization shows a higher thermal-oxidative stability. The addition of a primary AO increases the thermal-oxidative stability, whereas the secondary AO only increases OP. The addition of the two primary AOs has a synergetic effect resulting in higher OOT and OP values. Statistical analysis shows that OP data are influenced by all three AO types, but 0.2 m% of Irganox 1076 displays high potential in an industrial context.
摘要：
在目前的工作中,进行统计分析（16个加工条件和2个未改性样品），以研究丙烯腈-丁二烯-苯乙烯三元共聚物（ABS）熔融共混（220°C）过程中抗氧化剂（AOs）对聚丁二烯降解的影响（PB）富相，氧化起始温度(OOT)，氧化峰温度(OP)，和黄化指数(YI)。构建了预测方程，重点关注三种商业AOs（两种主要：Irganox1076和245；一种次要：Irgafos168）和两种商业ABS类型（质量和乳液聚合）。傅里叶变换红外光谱（FTIR）结果表明，在2237cm-1的腈吸收峰被推荐作为参考峰，以识别PB含量的化学变化。未改性ABS的熔融加工促进了OOT和OP的减少，并促进了YI的增加。通过本体聚合获得的ABS显示出更高的热氧化稳定性。初级AO的添加增加了热氧化稳定性，而继发性AO只会增加OP。两种主要AO的添加具有协同作用,导致更高的OOT和OP值。统计分析表明，OP数据受所有三种AO类型的影响，但0.2m%的Irganox1076在工业环境中显示出很高的潜力。
