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处女,消费者和环境塑料的密度:使用气体位移平面计的研究

Andrew Turner¹, Katie Jones¹, Montserrat Filella²

¹School of Geography, Earth and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth PL4 8AA, UK.

The Science of the total environment

|April 25, 2025

概括

水生环境中的塑料密度至关重要,但很少被测量. 这项研究发现,实际的塑料密度往往不同于公布的值,影响废物运输模型,并要求对样本进行特定测量.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
聚合物科学聚合物科学

背景情况:

塑料密度对于了解水生系统中的废物运输至关重要.
现有的文献和数据库往往缺乏准确的,实验确定塑料密度.
这种数据缺口阻碍了准确的环境建模和影响评估.

研究的目的:

为了准确地确定各种塑料类型的骨密度.
为了比较测量的密度与环境文献中常见的引用值.
确定差异的原因,并推改进的测量实践.

主要方法:

位位平面测量被用来测量骨密度.
用制造商数据,树脂代码或FTIR光谱检测验证了聚合物组成.
两个独立实验室以高精度 (<1% RSD) 进行了测量.

主要成果:

测量了42种处女,消费者和环境塑料的骨密度,这些塑料来自10种聚合物类型.
测量密度经常偏离在综合在线资源中报告的值,特别是对PET,PBT,PP和PVC.
差异归因于添加剂,微孔隙,污染和气候变化.

结论:

大多数聚合物表现出比通常公布的更广泛的密度范围.
发表的塑料密度数据可能对环境命运和运输建模不可靠.
建议对特定样本进行密度测量,特别是当浮力是关键因素时.

关键词:

添加剂添加剂添加剂浮力浮力浮力浮力美国的FTIR是FTIR.聚合物的聚合物.骨密度骨密度骨密度骨密度气候变化气候变化

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