Evaluate the Stabilization of Benzofuranone in Polypropylene at Higher Temperature Using Oxidative Onset Temperature
Benzofuranone derivatives had been used as chain-breaking antioxidants in the melt processing of polymer due to their strong hydrogen donating abilities, but very little is known the effect on the kinetics of oxidation of polyolefins at elevated temperature. In this paper, three benzofuranones with different structures had been added into polypropylene and the inhabitation of benzofuranone derivatives on the degradation of PP had been evaluated and compared using Oxidative Onset Temperature (OOT) obtained at different heating rate in oxygen as well as the degradation reactive energy calculated based on the OOT values using Ozawa and Kissinger methods. The results showed that benzofuranones inhibit the oxidative degradation of PP through increasing the degradation reactive energy and make PP with higher OOT values than those of virgin PP at every heating rate. And the more of increase of degradation reactive energy, the more obvious the stabilization of benzofuranone in PP. Furthermore, the methyl group of 2-position in 3 substituted benzene ring has an important influence on the antioxidant activity of benzofuranone derivatives i.e. 2methyl group presumably weakens the antioxidant activity and makes PP stabilized by 2-methyl substituted derivative (e.g. MXBF1) with lower OOT values and smaller degradation reactive energy than PP stabilized with benzofuranone derivatives without 2methyl group.
benzofuranone Oxidative Onset Temperature Oixdative Induce Time DSC
Zhi Cai Xin Meng Zhong Xin
SINOPEC Jiujiang Company, China Petroleum and Chemical Corporation, Jiujiang, China College of Chemical Engineering, East China University of Science and Technology, Shanghai ,China
国际会议
The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)
大连
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）