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首页> 外文期刊>Journal of Applied Polymer Science >Acrylonitrile–Butadiene Rubber Functionalization for the Toughening Modification of Recycled Poly(ethylene terephthalate)
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Acrylonitrile–Butadiene Rubber Functionalization for the Toughening Modification of Recycled Poly(ethylene terephthalate)

机译：丙烯腈-丁二烯橡胶官能团用于再生聚对苯二甲酸乙二醇酯的增韧改性

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摘要

The incorporation of functionalized acrylonitrile–butadiene rubber (NBR) into recycled poly(ethylene terephthalate) (PET) was introduced as an effective route for modifying the properties of PET and as a new method for PET recycling as well. To achieve modified NBR, glycidyl methacrylate (GMA) was grafted onto NBR with optimized reactive mixing, in which the highest grafting degree and lowest gel content were generated. PET/NBR blends with and without GMA functionalization were produced by melt mixing, and the mechanical properties, dynamic mechanical thermal properties, and phase morphologies of the systems were determined and compared. We found that low amounts of peroxide initiator (dicumyl peroxide) and high levels of the GMA monomer in the presence of the styrene comonomer led to the maximum grafting degree and suppressed the competing rubber crosslinking and GMA homopolymerization reactions. The blend compatibility with PET determined from dynamic mechanical thermal analysis spectra and scanning electron microscopy images was greatly improved when the NBR-grafted GMA was used instead of the neat NBR in the blend recipes. As a result, the rubber phase dispersed in the PET matrix more finely, and the impact strength of the blend advanced very significantly.
机译：将功能化的丙烯腈-丁二烯橡胶（NBR）掺入回收的聚对苯二甲酸乙二酯（PET）中被引入，是改善PET性能的有效途径，也是一种PET回收的新方法。为了获得改性的NBR，通过优化的反应混合将甲基丙烯酸缩水甘油酯（GMA）接枝到NBR上，从而产生最高的接枝度和最低的凝胶含量。通过熔融混合制备具有和不具有GMA功能化的PET / NBR共混物，并确定和比较系统的机械性能，动态机械热性能和相形态。我们发现，在苯乙烯共聚单体存在下，少量的过氧化物引发剂（过氧化二枯基过氧化物）和高含量的GMA单体会导致最大的接枝度，并抑制竞争性橡胶交联和GMA均聚反应。当在共混配方中使用NBR接枝的GMA代替纯净的NBR时，由动态机械热分析光谱和扫描电子显微镜图像确定的与PET的共混物相容性大大提高。结果，橡胶相更细地分散在PET基质中，并且共混物的冲击强度非常显着地提高。

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