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首页> 外文期刊>Journal of Applied Polymer Science >Comparative Study of Polypropylene Nucleated by Individual and Compounding Nucleating Agents. I. Melting and Isothermal Crystallization
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Comparative Study of Polypropylene Nucleated by Individual and Compounding Nucleating Agents. I. Melting and Isothermal Crystallization

机译：单独和复合成核剂成核聚丙烯的比较研究。 I.熔化和等温结晶

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In this study, melting and isothermal crystallization behaviors of polypropylene (PP) nucleated with different nucleating agents (NAs) have been comparatively studied. a-phase NA 1,3 : 2,4-bis (3,4-dimethylbenzylidene) sorbitol (DMDBS, Millad 3988), b-phase NA aryl amides compound (TMB-5), and their compounds were introduced into PP matrix, respectively. The crystallization and melting characteristics as well as the crystallization structures and morphologies of nucleated PP were studied by differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), and polarized light microscopy (PLM). As indicated by previous work that a few amounts of a-phase NA (DMDBS) or b-phase NA (TMB-5) has apparent nucleation effect for PP crystallization. However, the crystallization of PP nucleated with compounding NAs is dependent on the content of each NA. In the sample of PP with 0.1 wt % DMDBS and 0.1 wt % TMB-5, the nucleation efficiency of TMB-5 is much higher than that of DMDBS and PP crystallization is mainly nucleated by TMB-5, and in this condition, b-phase PP is the main crystallization structure. For the sample of PP with 0.2 wt % DMDBS and 0.2 wt % TMB-5, 0.2 wt % DMDBS has higher nucleation efficiency than 0.2 wt % TMB5, and a-phase is the main crystalline structure in this sample. The isothermal crystallization kinetics and crystallization structure have been analyzed in detail in this work.
机译：在这项研究中，已经比较研究了用不同成核剂（NAs）成核的聚丙烯（PP）的熔融和等温结晶行为。将a相NA 1,3：2,4-双（3,4-二甲基亚苄基）山梨醇（DMDBS，Millad 3988），b相NA芳基酰胺化合物（TMB-5）引入到PP基体中，分别。通过差示扫描量热法（DSC），广角X射线衍射（WAXD）和偏光显微镜（PLM）研究了成核PP的结晶和熔融特性，以及结晶结构和形态。如先前的工作所示，少量的a相NA（DMDBS）或b相NA（TMB-5）对PP结晶具有明显的成核作用。然而，被复合NAs成核的PP的结晶取决于每个NA的含量。在具有0.1 wt％DMDBS和0.1 wt％TMB-5的PP样品中，TMB-5的成核效率比DMDBS高得多，并且PP的结晶主要由TMB-5成核，在这种情况下，b- PP是主要的结晶结构。对于具有0.2 wt％DMDBS和0.2 wt％TMB-5的PP样品，0.2 wt％DMDBS的成核效率高于0.2 wt％TMB5，并且a相是该样品的主要晶体结构。在这项工作中已详细分析了等温结晶动力学和结晶结构。

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