Nanosilica-immobilized UV absorber: Synthesis and photostability of polyolefins

Liu Peng Gao Chong Han Chunchun Tang Hanying Wang Feng Ding Yanfen Zhang Shimin Yang Mingshu · 2015

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低密度聚乙烯

期刊名称：

Polymer International 2015 年 64 卷 8 期

发表日期：

2015.08.01

摘要：

The mechanism of SiO2-APTMS-UVA absorbs UV light. A nanosilica-immobilized UV absorber (SiO2-APTMS-UVA) was prepared by the following methods: the fumed nanosilica was first modified with an aminosilane coupling agent 3-aminopropyltrimethoxysilane (APTMS) and then reacted with hydroxy-benzoyl chloride. Several measurements confirmed that the UV absorber was chemically immobilized on the surface of the nanosilica. SEM observation showed that SiO2-APTMS-UVA was homogeneously dispersed in the matrix of low density polyethylene (LDPE) and polypropylene (PP). The photo-degradation of the nanocomposites was evaluated by an accelerated aging test. It was found that the SiO2-APTMS-UVA has a great effect on preventing the degradation of LDPE or PP under UV exposure.