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首页> 外文期刊>Journal of Polymers and the Environment >Novel Recycling System of Polystyrene Water Debris with Polymer Photocatalyst and Thermal Treatment
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Novel Recycling System of Polystyrene Water Debris with Polymer Photocatalyst and Thermal Treatment

机译：聚苯乙烯水碎片新型聚合物光催化剂和热处理的新型回收系统

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摘要

A poly(styrene-block-acrylic acid) containing TiO2 gel (PS-b-PAA/TiO2) polymer photocatalyst had the same density as PS and could provoke photocatalytic activity to PS particles in water. It showed photocatalytic activity to a PS containing a N-H type hindered amine light stabilizer (PS/LA-77) in water under the UV irradiation. The molecular weight decrease was ca. 10%, showing that a weaker light source and different kind of hindered amine light stabilizer (HALS) should be employed. The phthalocyanine modified photocatalyst had the activity under visible light irradiation. In addition, a N-OR type HALS (LA-81) loading worked as radical scavenger, showing that the PS autoxidation was certainly controlled. After the 144 h irradiation, the molecular weight was drastically decreased with the increases of heating temperature and time. When the heat treatment was performed by the enclosed sample with the aluminum foil, the molecular weight change behavior was considerably different between the PS and PS/LA-81. The difference was due to the chain scission mechanism. The intra-alkyl radical production in PS chain allowed controlling molecular weight by the heat treatment.
机译：含有TiO 2凝胶（PS-B-PAA / TiO 2）聚合物光催化剂的聚（苯乙烯 - 嵌段丙烯酸）具有与PS相同的密度，并且可以将光催化活性刺激到水中的PS颗粒。它向UV照射下的水中含有含有N-H型受阻胺光稳定剂（PS / LA-77）的PS的光催化活性。分子量减少是Ca. 10％，表明应采用较弱的光源和不同种类的受阻胺光稳定剂（HALS）。酞菁改性光催化剂在可见光照射下具有活性。此外，作为自由基清除剂的N-或类型HALS（LA-81）装载，表明PS自动氧化肯定是控制的。在144小时照射后，随着加热温度和时间的增加，分子量急剧下降。当通过封闭的样品与铝箔进行热处理时，PS和PS / LA-81之间的分子量变化行为显着不同。差异是由于链易裂变机制。 PS链中的烷基内自由基产生允许通过热处理控制分子量。

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