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首页> 外文期刊>Polymers for advanced technologies >Effect of compounding procedure on morphology and crystallization behavior of isotactic polypropylene/high-density polyethylene/carbon black ternary composites
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Effect of compounding procedure on morphology and crystallization behavior of isotactic polypropylene/high-density polyethylene/carbon black ternary composites

机译：复合工艺对等规聚丙烯/高密度聚乙烯/炭黑三元复合材料的形貌和结晶行为的影响

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摘要

The effect of compounding procedure on morphology and crystallization behavior of isotactic polypropylene/highdensity polyethylene/carbon black (iPP/HDPE/CB) composite was investigated. iPP/HDPE/CB composites were prepared by four compounding procedures (A: iPP + HDPE + CB; B: iPP/HDPE + CB; C: HDPE/CB + iPP; D: iPP/CB + HDPE). Scanning electron microscopy observation showed that CB particles are mainly distributed in HDPE in all composites, and the phase morphology of composites was obviously affected by a compounding procedure. The size of the HDPE/CB domains in the composites prepared by procedures A and D decreased with the increase in CB content, whereas that of HDPE/CB in the composites prepared by procedures B and C rarely changed with the increase in CB content. The crystallization behaviors of the composites were significantly affected by their phase morphology, which resulted from the variation of compounding procedure. The isothermal crystallization rate of iPP in the composites prepared by procedures A and D was obviously increased, which may originate from the small HDPE/CB droplets dispersed in the iPP phase. The non‐isothermal crystallization curves of composites prepared by procedure D represented two peaks because the iPP component in these composites had the fastest crystallization rate, whereas the curves of composites prepared by other compounding sequences only exhibited one peak. Moreover, the crystallinity of HDPE almost increased by one time with the incorporation of only 1 phr CB because the CB particles selectively located in the HDPE phase, and the crystallinity of HDPE decreased with the further increase of CB content because of the strong restriction of CB on the HDPE chains.
机译：研究了复合工艺对等规聚丙烯/高密度聚乙烯/炭黑（iPP / HDPE / CB）复合材料的形貌和结晶行为的影响。 iPP / HDPE / CB复合材料通过四种混合程序（A：iPP + HDPE + CB; B：iPP / HDPE + CB; C：HDPE / CB + iPP; D：iPP / CB + HDPE）制备。扫描电子显微镜观察表明，在所有复合物中，CB颗粒主要分布在HDPE中，复合过程明显影响了复合物的相态。通过步骤A和D制备的复合材料中HDPE / CB结构域的尺寸随CB含量的增加而减小，而通过步骤B和C制备的复合材料中HDPE / CB的尺寸很少随CB含量的增加而变化。复合物的结晶行为受到其相态形态的显着影响，这是由于配合过程的变化而引起的。通过步骤A和D制备的复合材料中iPP的等温结晶速率明显提高，这可能是由于iPP相中分散的HDPE / CB小液滴引起的。通过步骤D制备的复合材料的非等温结晶曲线表示两个峰，因为这些复合物中的iPP组分具有最快的结晶速率，而通过其他配混顺序制备的复合物的曲线仅显示一个峰。而且，由于仅选择性地将HDB相中的CB颗粒加入，仅加入1phr CB，HDPE的结晶度几乎增加了1倍，并且由于CB的强限制，HDPE的结晶度随着CB含量的进一步增加而降低。在HDPE链上。

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