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首页> 外文期刊>Polymer Composites >The Effect of Gamma and Electron Beam Irradiation on the Thermal and Mechanical Properties of Injection- Moulded High Crystallinity Poly(propylene)
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The Effect of Gamma and Electron Beam Irradiation on the Thermal and Mechanical Properties of Injection- Moulded High Crystallinity Poly(propylene)

机译：γ和电子束辐照对注塑高结晶度聚丙烯的热力学性能的影响

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摘要

In the present study, the effect of gamma and electron beam (EB) irradiation on the thermal and mechanical properties of high crystalline polypropylene (HPP) was studied. To study the structural modifications of HPP polymer which could occur following these treatments at different doses (20, 40, 60, 80, 100, and 120 kGy) were applied to all samples. Nonirradiated HPP were used as control samples, differential scanning calorim-etry analysis, thermogravimetric analysis, and Mechanical tests were carried out to evaluate the effect of both irradiation treatments (EB and gamma irradiation) on HPP samples. Irradiated samples of HPP decreases melting temperature (T_m) of matrix in EB more than in gamma rays up to 5 C. The changes of mechanical properties exhibit different radiation stability towards Co-gamma radiation and EB radiation. This difference reflects much higher penetration of the gamma radiation through the polymeric material as a function of sample thickness. The degradation on polymer properties caused by gamma irradiation was more than that caused by EB irradiation. Next, we compared the effects of gamma and EB irradiation to determine which of these two processes better maintained the integrity of the irradiated product.
机译：在本研究中，研究了γ和电子束（EB）辐照对高结晶聚丙烯（HPP）的热和机械性能的影响。为了研究在不同剂量（20、40、60、80、100和120 kGy）的这些处理后可能发生的HPP聚合物的结构修饰，将其应用于所有样品。将未辐照的HPP用作对照样品，差示扫描量热分析，热重分析和进行机械测试以评估两种辐照处理（EB和γ辐照）对HPP样品的影响。 HPP辐照样品在高达5 C的温度下比在γ射线中降低了EB中基质的熔化温度（T_m）。机械性能的变化对Co-γ辐射和EB辐射表现出不同的辐射稳定性。这种差异反映出伽马射线穿过聚合物材料的穿透性要高得多，这是样品厚度的函数。 γ辐射引起的聚合物性能下降比EB辐射引起的下降更大。接下来，我们比较了伽玛射线和EB辐射的影响，以确定这两个过程中哪个能更好地保持被辐照产品的完整性。

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