Immobilization of antioxidant on nanosilica and the aging resistance behavior in polypropylene

被引:61
作者
Chen, Jing [1 ,2 ]
Yang, Ming Shu [1 ]
Zhang, Shi Min [1 ]
机构
[1] Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Polymers & Composites Div, Ningbo 315201, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Nano-structures; Thermal properties; Surface analysis; SILICA NANOPARTICLES; POLYPROPYLENE/MONTMORILLONITE NANOCOMPOSITES; MESOPOROUS SILICA; SURFACE; POLYETHYLENE; PARTICLES; COMPOSITE; CATALYST;
D O I
10.1016/j.compositesa.2011.01.006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Nanosilica was firstly reacted with the reactive antioxidant, methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate (AO), via transesterification, to form a nanosilica-immobilized antioxidant, AO-silica. And then it was incorporated into polypropylene (PP) by melt compounding. Fourier transform infrared spectroscopy combined with the other characterization methods elucidated that the reactive antioxidant was chemically immobilized onto the nanosilica surface. SEM observation showed that the nanosilica-immobilized antioxidant was homogeneously dispersed into the matrix of PP. It has been reported that the antioxidative efficiency of AO-silica was superior to the corresponding low molecular counterpart (AO), based on the measurement of the oxidation induction time (OIT) of the PP/AO-silica and the PP/AO compounds containing equivalent antioxidant component. By paying attention to the changes of carbonyl absorption at different UV exposure times, it was observed that the UV aging-resistance ability of PP/nanosilica-immobilized antioxidant was much higher than that of PP/neat nanosilica compound during the long-time accelerated photo aging. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码:471 / 477
页数:7
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