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首页> 外文期刊>Journal of Applied Polymer Science >Radical grafting of polar monomers onto polypropylene by reactive extrusion
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Radical grafting of polar monomers onto polypropylene by reactive extrusion

机译：通过反应挤出将极性单体自由基接枝到聚丙烯上

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摘要

Polypropylene (PP) was functionalized in the melt by grafting polar monomers using an internal mixer and a corotating twin-screw extruder. 2,5-Bis(tertbutylperoxy)-2,5-dimethylhexane (Luperox 101) and dicumyl peroxide (DP) were the used radical initiators. The polar monomers were itaconic acid (IAc), 2-octen-1-ylsuccinic anhydride (OY), 2-hydroxyethyl methacrylate (HEMA), and 3-allyloxy-1,2-propanediol (AP). Grafting was quantified by FTIR combined to Elemental Analysis. Grafting degree depends mainly on monomer and initiator natures and concentrations. Grafting degree maxima were 3.9, 2, 9.5, and 3.9 wt %, respectively, for IAc, OY, HEMA, and AP. Some properties of the modified PP were evaluated. Thermal analysis indicated that the polarity of PP increased by grafting reaction and size-exclusion chromatography showed that the grafting was not accompanied by a significant M_w and viscosity decrease.
机译：通过使用内部混合器和同向旋转双螺杆挤出机接枝极性单体，使聚丙烯（PP）在熔体中官能化。使用的2,5-双（叔丁基过氧）-2,5-二甲基己烷（Luperox 101）和过氧化二枯基（DP）是自由基引发剂。极性单体为衣康酸（IAc），2-辛烯-1-基琥珀酸酐（OY），甲基丙烯酸2-羟乙酯（HEMA）和3-烯丙氧基-1，2-丙二醇（AP）。通过FTIR结合元素分析对接枝进行定量。接枝度主要取决于单体和引发剂的性质和浓度。对于IAc，OY，HEMA和AP，最大接枝度分别为3.9、2、9.5和3.9 wt％。评价了改性PP的一些性能。热分析表明，接枝反应增加了聚丙烯的极性，尺寸排阻色谱表明接枝没有明显的M_w和粘度降低。

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