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首页> 外文期刊>Journal of Applied Polymer Science >Polymorphism in a metallocenic isotactic polypropylene as revealed by means of FTIR spectroscopy: Influence of the processing conditions
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Polymorphism in a metallocenic isotactic polypropylene as revealed by means of FTIR spectroscopy: Influence of the processing conditions

机译：FTIR光谱显示茂金属等规聚丙烯中的多态性：加工条件的影响

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摘要

The polymorphic structure in specimens of a metallocenic isotactic polypropylene, processed under different conditions, has been studied by means of wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), and Fourier transform infrared spectroscopy (FTIR). The proportions of the different polymorphs have been evaluated, and the influence of the processing parameters (nucleating agents, cooling rate, and nature of the surface of the molds) has been analyzed. The combination of WAXS, DSC, and FTIR results confirms the adequacy of this last technique to obtain quantitative information about the competition between the crystalline phases of polypropylene. It has also been proved that the nature of the mold can enhance considerably the activity of beta-nucleating agents.
机译：已经通过广角X射线散射（WAXS），差示扫描量热法（DSC）和傅里叶变换红外光谱（FTIR）研究了在不同条件下加工的茂金属等规聚丙烯样品中的多晶型结构。评估了不同多晶型物的比例，并分析了加工参数（成核剂，冷却速率和模具表面性质）的影响。 WAXS，DSC和FTIR结果的组合证实了最后一种技术的适当性，该技术可获取有关聚丙烯结晶相之间竞争的定量信息。还已经证明，霉菌的性质可以显着提高β成核剂的活性。

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