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首页> 外文期刊>Journal of Applied Polymer Science >Irradiation processing of immisciblePP/EOCblend: Morphology control and processability modification
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Irradiation processing of immisciblePP/EOCblend: Morphology control and processability modification

机译：免疫辐射加工免疫纯度：形态控制和可加工性修饰

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摘要

In this study, applying electron beam irradiation method at a relatively low-irradiation dose (20 kGy) under the air atmosphere to prepare injectable polypropylene (PP)/ethylene-octene copolymer (EOC) blends with fine morphology and appropriate performance was investigated. For this purpose, an extrusion PP grade with an EOC grade suitable to improve its impact resistance was melting blended. Gel content and rheological measurements revealed long-chain branching is predominant phenomenon occurring during the irradiation process of EOC. Blend irradiation resulted in changing its melt flow index proper for injection molding. A fine morphology obtained for the unirradiated blend was preserved for the irradiated blend. Moreover, irradiation thermally stabilized the blend morphology. Blends linear viscoelastic behavior discussed by proper rheological models revealed the existence of interfacial interactions and a reduction of the interfacial tension between irradiated blend phases. No significant effect of irradiation on the crystallization characteristics of EOC and the blend was observed. The satisfying impact resistance of the irradiated blend was near to that of the unirradiated blend, although its tensile mechanical properties were less.
机译：在本研究中，采用电子束辐照方法，在空气气氛下以相对较低的辐照剂量（20kgy）制备具有良好形态和适当性能的可注射聚丙烯（PP）/乙烯-辛烯共聚物（EOC）共混物。为此，将挤出PP级与EOC级进行熔融共混，以提高其抗冲击性。凝胶含量和流变学测量表明，长链分支是EOC辐照过程中的主要现象。共混物辐照改变了其熔体流动指数，适合注塑成型。未经辐照的共混物保持了良好的形态。此外，辐照热稳定了共混物的形态。通过适当的流变模型讨论了共混物的线性粘弹性行为，揭示了界面相互作用的存在和辐照共混物相之间界面张力的降低。辐照对EOC和共混物的结晶特性没有显著影响。辐照共混物的抗冲击性能接近未辐照共混物，但拉伸力学性能较差。

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