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首页> 外文期刊>Journal of Applied Polymer Science >Simultaneous Polypropylene Functionalization and Nanoclay Dispersion in PP/Clay Nanocomposites using Ultrasound
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Simultaneous Polypropylene Functionalization and Nanoclay Dispersion in PP/Clay Nanocomposites using Ultrasound

机译：聚丙烯在聚丙烯/粘土纳米复合材料中同时进行功能化和纳米粘土分散

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摘要

Polypropylene nanocomposite materials were prepared with 5 and 10 wt % cloisite C20A clay, jointly with 0.6 and 1.2 wt % of maleic anhydride (MA) for the simultaneous polymer functionalization and clay dispersion in a twin screw extruder assisted with ultrasonic irradiation, using different sonication intensities (231, 347, and 462 W, which correspond to 30%, 45%, and 60% of the maximum instrument intensity, "770 W") all in a single-step operation. The MA polymer functionalization was followed by FTIR spectroscopy and determined by titration. The increase in modulus of the obtained PP/Clay nanocomposites was attributed to the greater dispersion level, presumably achieved becuase of the joint application of the PP–Clay compatibilization with MA and the sonication during processing in a twin screw extruder. The greater level of clay dispersion was verified by the displacement of the XRD diffraction peak to lower angles, indicating an intercalated-exfoliated structure that was corroborated by STEM.
机译：聚丙烯纳米复合材料是由5和10 wt％的堇青石C20A粘土，以及0.6和1.2 wt％的马来酸酐（MA）共同制备的，用于在不同超声处理强度的同时，在超声波辅助的双螺杆挤出机中同时进行聚合物官能化和粘土分散（231、347和462 W，分别相当于最大仪器强度“ 770 W”的30％，45％和60％），所有操作均通过单步操作进行。 MA聚合物官能化之后是FTIR光谱法，并通过滴定法测定。所获得的PP /粘土纳米复合材料的模量增加归因于较高的分散度，推测是由于与MA共同使用的PP-Clay增容剂和在双螺杆挤出机中进行超声处理而实现的。通过XRD衍射峰向较低角度的位移证明了粘土的分散程度更高，这表明STEM证实了插层剥离结构。

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