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首页> 外文期刊>Journal of Applied Polymer Science >Novel intercalated nanocomposites of polypropylene/organic-rectorite/polyethylene-octene elastomer: Rheology, crystallization kinetics, and thermal properties
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Novel intercalated nanocomposites of polypropylene/organic-rectorite/polyethylene-octene elastomer: Rheology, crystallization kinetics, and thermal properties

机译：聚丙烯/有机锂蒙脱石/聚乙烯-辛烯弹性体的新型插层纳米复合材料：流变性，结晶动力学和热性能

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The melt blending method was applied to prepare ternary composites of polypropylene (PP)/organic-rectorite (OREC)/polyethylene-octene elastomer (POE) at constant content of 2 phr (parts per hundred PP) of OREC and 5, 10, 15 phr of POE (named PRE25, PRE210, and PRE215, separately) via twin-screw extruder. At the same time the binary composites of OREC/PP at 2 phr loading of OREC, named PR2 were prepared in order to investigate effects of OREC and POE on rheology and crystallization properties of composites. The rheology was characterized on capillary rheometer, nonisothermal crystallization kinetics on differential scanning calorimetry (DSC), and thermal stability properties on thermogravimetric analysis (TG). It is found that melting PR2 and PRE systems conform to the law of Non-Newton and shear-thinning behavior is observed for both systems. The apparent viscosity of the melt decreases with the increase of POE loadings. The crystallization half-time (t(1/2)) of PRE is shorter, the rate constant Zc larger, which indicates OREC and POE has the heterogeneous nucleation effect and the crystallization rate of PP was increased. The enthalpy of PRE is lower than that of PR2 and pure PP at the same conditions, which shows that the relative crystallinity of PRE composites are reduced. TG curves show that the ternary systems have higher thermal stability in contrast with pure PP. (C) 2005 Wiley Periodicals, Inc.
机译：采用熔融共混法以恒定的2份（每百PP份数）的OREC和5、10、15的恒定含量制备聚丙烯（PP）/有机锂蒙脱石（OREC）/聚乙烯-辛烯弹性体（POE）的三元复合材料通过双螺杆挤出机获得phr POE（分别命名为PRE25，PRE210和PRE215）。同时，制备了以2phr的OREC负载的OREC / PP二元复合物，称为PR2，以研究OREC和POE对复合物的流变学和结晶性能的影响。在毛细管流变仪上表征流变学，在差示扫描量热法（DSC）上表征非等温结晶动力学，并在热重分析（TG）上表征热稳定性。发现熔融的PR2和PRE体系符合非牛顿定律，并且观察到两种体系的剪切稀化行为。熔体的表观粘度随POE载荷的增加而降低。 PRE的结晶半衰期（t（1/2））较短，速率常数Zc较大，这表明OREC和POE具有异相成核作用，PP的结晶速率增加。在相同条件下，PRE的焓低于PR2和纯PP，表明PRE复合材料的相对结晶度降低。 TG曲线表明，与纯PP相比，三元体系具有更高的热稳定性。 （C）2005 Wiley期刊公司

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