This study aims at investigating the blooming of Irganox 1076® onto the surface of a silane-crosslinked polyethylene. Preliminary studies on the commercial Irganox 1076® powder enabled to identify its crystalline structure and determine its main physico-chemical properties (characteristic IR absorption bands, melting properties, etc.). Then, the behaviour of Irganox 1076® in silane-grafted polyethylene was studied. Several films containing a concentration of Irganox 1076® ranged between 0.1 wt% and 2.1 wt% were characterized with FTIR spectroscopy and DSC. A peculiar attention was paid to the phase separation within the polymer bulk and the blooming of the antioxidant onto the polymer film surface. Then, this methodology was transposed to an industrial silane-crosslinked polyethylene containing at least 1 wt% of Irganox 1076® as in-service protective antioxidant. For this latter, optical microscopy was of great help for monitoring the blooming of Irganox 1076® onto the polymer film surface. In addition, the polymorphism phenomenon of Irganox 1076® was revealed by FTIR spectroscopy and DSC after thermal treatment at 70 °C under vacuum.

这项研究旨在研究Irganox1076®在硅烷交联聚乙烯表面上的起霜现象。对商用Irganox1076®粉末的初步研究能够确定其晶体结构，并确定其主要理化性质（特征红外吸收带，熔融性质等）。然后，研究了Irganox1076®在硅烷接枝的聚乙烯中的行为。用FTIR光谱和DSC表征了几种浓度为0.1wt％至2.1wt％的Irganox 1076的薄膜。特别注意了聚合物本体中的相分离和抗氧化剂在聚合物膜表面上的起霜。然后，将该方法转换为包含至少1 wt％的Irganox1076®作为使用中的保护性抗氧化剂的工业硅烷交联聚乙烯。对于后者，光学显微镜对于监测Irganox1076®在聚合物膜表面上的起霜具有很大的帮助。此外，在70°C的真空下进行热处理后，通过FTIR光谱和DSC揭示了Irganox1076®的多态现象。