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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and Characterization of Injection-Homo-Polypropylene Filled with Nano-CaCO_3
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Preparation and Characterization of Injection-Homo-Polypropylene Filled with Nano-CaCO_3

机译：纳米CaCO_3填充均聚聚丙烯的制备与表征

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Nano-CaCO_3/homo-PP composites wereprepared by melt-blending using twin-screw extruder. Theresults show that not only the impact property but also thebending modulus of the system have been evidentlyincreased by adding nano-CaCO_3. The nano-CaCO_3particleshave been dispersed in the matrix in the nanometer scalewhich was investigated by means of transmission electronmicroscopy (TEM). The toughening mechanism of nano-CaCO_3, investigated by means of dynamical mechanicalthermal analysis, (DMTA) and scanning electron microscopy(SEM), lies on that the nano-CaCO_3particles take an action ofinitiating and terminating crazing (silver streak), which canabsorb more impact energy than the neat PP. At the sametime, the nano-CaCO_3particles, as the nuclear, decrease thecrystal size of PP, the results of which were investigated bymeans of polarized optical microscope (POM).
机译：使用双螺杆挤出机通过熔融共混制备纳米CaCO_3 /均质PP复合材料。结果表明，加入纳米CaCO_3不仅明显提高了系统的冲击性能，而且弯曲系统的弯曲模量明显增加。纳米CaCO_3颗粒已经以纳米级分散在基质中，这是通过透射电子显微镜（TEM）研究的。借助动态机械热分析（DMTA）和扫描电子显微镜（SEM）研究了纳米CaCO_3的增韧机理，在于纳米CaCO_3颗粒具有引发和终止裂纹（银条纹）的作用，可以吸收更多的冲击力能量比纯净的PP好。同时，纳米CaCO_3颗粒作为核，降低了PP的晶体尺寸，并通过偏光显微镜（POM）研究了其结果。

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