Polyethylene (PE) and polystyrene (PS) samples were irradiated in air with 14.89 MeV electrons at the flux of 247 Gy min(-1) and the structural changes induced by the irradiation were characterized using UV-vis and IR spectroscopies, differential scanning calorimetry (DSC), and gel permeation chromatography (GPC) and by measuring the contact angle. It was found, in accord with previous studies, that the electron irradiation leads to oxidation of polymers and to splitting of aromatic rings in PS. The surface polarity of degraded polymers increases linearly with increasing electron fluence, the increase being much steeper for PS. No significant changes of crystallic phase or of melting temperature were observed in PE after irradiation. In PS, however, the electron irradiation results in macromolecule splitting and intensive crosslinking. (C) 1997 John Wiley & Sons, Inc. [References: 14]
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机译：聚乙烯（PE）和聚苯乙烯（PS）样品在空气中以247 Gy min（-1）的通量用14.89 MeV电子辐照，并通过紫外可见光谱和红外光谱，差示扫描量热法表征了辐照引起的结构变化（DSC）和凝胶渗透色谱（GPC）并通过测量接触角。根据先前的研究发现，电子辐射导致聚合物氧化并导致PS中的芳环分裂。降解的聚合物的表面极性随电子注量的增加而线性增加，对于PS而言，增加的幅度更大。辐照后在PE中未观察到结晶相或熔融温度的显着变化。然而，在PS中，电子辐照会导致大分子分裂和强烈的交联。 （C）1997 John Wiley＆Sons，Inc. [参考：14]
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