Abstract:

The synergistic antioxidant performance of a new antioxidant for polyolefin and phosphite antioxidant 168 was studied with PP and LLDPE resins by measurement of melt flow rate（MFI）and oxidation induction time（OIT）. The results showed that the new antioxidant for polyolefin had excellent processing properties and oxidation resistance behavior with the two polyolefin resins，and the antioxidant performance of the antioxidant was superior to antioxidant 3114. The new antioxidant for polyolefin combined with a secondary antioxidant 168 had higher oxidation resistance behavior. The synergy effects on processing stability and thermal oxidation stability in PP resin were 274.62% and 59.90% respectively. The synergy effects on processing stability and thermal oxidation stability  with  LLDPE resin were 257.74% and 109.64% respectively. The mechanical properties of polyolefins could also be improved.

摘要：

以PP和LLDPE树脂为基料，采用熔体流变速率和氧化诱导期研究了新型聚烯烃抗氧剂与亚磷酸酯抗氧剂168的协同抗氧化作用。结果表明，添加单一新型复合主抗氧剂的PP和LLDPE树脂具有良好的加工稳定性和热氧稳定性，优于抗氧剂3114。与抗氧剂168并用时，具有良好的协同效果，应用于PP树脂中，其加工稳定和热氧稳定协同效应分别为274.62%和59.90%；应用于LLDPE树脂中，其加工稳定和热氧稳定协同效应分别为257.74%和109.64%；并能较好地改善两类聚烯烃树脂的力学性能。