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首页> 外文期刊>Journal of Applied Polymer Science >RHEOLOGICAL PROPERTIES, CRYSTALLIZATION, AND MORPHOLOGY OF COMPATIBILIZED BLENDS OF ISOTACTIC POLYPROPYLENE AND POLYAMIDE
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RHEOLOGICAL PROPERTIES, CRYSTALLIZATION, AND MORPHOLOGY OF COMPATIBILIZED BLENDS OF ISOTACTIC POLYPROPYLENE AND POLYAMIDE

机译：异丙基聚丙烯和聚酰胺的相容性混合物的流变性质，结晶和形态

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Blends of isotactic polypropylene (iPP) with the polyamide nylon-6 (N6), prepared by extrusion, were studied with a composition of up to 30% by weight polyamide. In the case of a 70/30 iPP/N6 blend, the influence of a compatibilizing agent based on polypropylene functionalized with maleic anhydride (PP-g-MA), with compositions of 1, 3, 5, and 10% by weight in polypropylene, was followed. The influence of the concentration of N6 and the compatibilizing agent on the rheological and thermal properties, and the morphology of the blends, was analyzed by monitoring the melt viscosity at different shear rates, differential scanning calorimetry, and polarized light microscopy. Vibrational spectroscopy was used to characterize the blends and to study the effect of the compatibilizing agent. The viscosity-composition curves for the iPP/N6 blends, in the composition and shear rate ranges analyzed, show a negative deviation from the additive rule, while the opposite trend is observed for the blends compatibilized with PP-g-MA. Important variations in the spectroscopic behavior was observed between compatibilized and noncompatibilized blends, which varied as a function of the compatibilizing agent concentration. The crystallization rates of iPP in the iPP/N6 blends, under both dynamic and isothermal conditions, are much greater than are those observed for pure iPP and are directly related to the nucleating activity of the polyamide. This effect is much smaller in the presence of the compatibilizing agent. The isothermal crystallization of the polyamide N6 in compatibilized blends is affected by the presence of iPP, reducing the crystallization rate due to the diluent effect of the polypropylene. (C) 1997 John Wiley & Sons, Inc. [References: 45]
机译：研究了通过挤出制备的等规聚丙烯（iPP）与聚酰胺尼龙6（N6）的共混物，其聚酰胺含量高达30％。在70/30 iPP / N6共混物的情况下，增容剂对以马来酸酐官能化的聚丙烯（PP-g-MA）为基础的增容剂的影响，聚丙烯中的组成为1，3、5和10重量％ ， 被跟从。通过监测不同剪切速率下的熔体粘度，差示扫描量热法和偏光显微镜，分析了N6和相容剂浓度对流变学和热学性质以及共混物形态的影响。振动光谱法用于表征共混物并研究相容剂的作用。在分析的组成和剪切速率范围内，iPP / N6共混物的粘度-组成曲线显示出与添加规则的负偏差，而与PP-g-MA相容的共混物则观察到相反的趋势。在增容混合物和非增容混合物之间观察到光谱行为的重要变化，其随增容剂浓度的变化而变化。在动态和等温条件下，iPP / N6共混物中iPP的结晶速率远高于纯iPP所观察到的结晶速率，并且与聚酰胺的成核活性直接相关。在相容剂的存在下，这种作用要小得多。 iPP的存在会影响相容共混物中聚酰胺N6的等温结晶，由于聚丙烯的稀释作用，结晶速度会降低。 （C）1997 John Wiley＆Sons，Inc. [参考：45]

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