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首页> 外文期刊>Journal of Applied Polymer Science >Structural changes and mechanical performance of recycled poly(vinyl chloride) bottles exposed to ultraviolet light at 313 nm
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Structural changes and mechanical performance of recycled poly(vinyl chloride) bottles exposed to ultraviolet light at 313 nm

机译：313 nm紫外线下的再生聚氯乙烯瓶的结构变化和力学性能

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摘要

The structural changes and mechanical performance of virgin poly(vinyl chloride) (PVC) bottle (VB) compounds blended with postconsumer PVC bottles collected from a specified factory (RB-F) and houses (RB-H), were examined before and after UV irradiation at 313-nm UV wavelength for different periods of time up to 28 days. The results indicated that, when exposed to UV light, the RB-F/VB blends containing greater conjugated double bonds with higher yellowness index appeared to exhibit better mechanical performance than that of the RB-H/VB blends. It was found that the amount of conjugated double bonds was not a linear function of the discoloration level of PVC compounds. Tensile strength of the VB compounds was not affected when incorporated with RB-F recyclate, but progressively decreased with increasing RB-H recyclate. An optimum concentration for RB recyclates to be added into the virgin compound was recommended for obtaining a maximum impact strength. Both tensile and impact strengths decreased with increasing UV exposure time, a severe degradation being obvious after a UV exposure time of 21 days. Hardness was not affected significantly by the addition of PVC recyclate, but increased with increasing UV exposure time. (C) 2004 Wiley Periodicals, Inc. [References: 19]
机译：在紫外线照射前后，检查了从指定工厂（RB-F）和房屋（RB-H）收集的原始聚氯乙烯（PVC）瓶（VB）化合物与消费后的PVC瓶混合后的结构变化和机械性能在313 nm的紫外线波长下照射28天。结果表明，当暴露于紫外光下时，具有更高共轭双键和更高泛黄指数的RB-F / VB共混物表现出比RB-H / VB共混物更好的机械性能。发现共轭双键的量不是PVC化合物的变色水平的线性函数。当与RB-F回收物结合时，VB化合物的拉伸强度不受影响，但随着RB-H回收物的增加而逐渐降低。为了获得最大的冲击强度，建议将RB回收物的最佳浓度添加到原始化合物中。拉伸强度和冲击强度都随着紫外线暴露时间的增加而降低，在紫外线暴露21天后，严重的降解很明显。硬度不受加入PVC回收料的影响不大，但随紫外线暴露时间的增加而增加。 （C）2004 Wiley Periodicals，Inc. [参考：19]

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