Influence of temperature on styrene emission from a vinyl ester resin thermoset composite material.
Influence of temperature on styrene emission from a vinyl ester resin thermoset composite material.
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DOI：
10.1016/j.scitotenv.2011.05.042
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发表时间：
2011-08
期刊：
影响因子：
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通讯作者：
Shaun A. Crawford;C. Lungu
中科院分区：
文献类型：
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作者：
Shaun A. Crawford;C. Lungu
与大多数金属相比，由乙烯基酯树脂制成的复合材料更轻、更强且耐腐蚀，并且越来越多地被用作建筑材料和公共交通。苯乙烯单体在乙烯基酯树脂 (VER) 复合材料的生产中用作稀释剂和增强剂。一些研究人员认为，VER 复合材料中的游离苯乙烯可以从材料中扩散到空气中，可能会通过吸入暴露对人类造成不利的健康影响，但文献中没有关于这些材料的苯乙烯排放量的已知数据。在这项研究中，一种典型的 VER 复合材料由含有 38% 重量苯乙烯的树脂制成，用无碱玻璃纤维增强，并使用真空辅助树脂转移方法形成，通过环境测试室 (ETC) 方法对苯乙烯排放进行了表征。 ETC 中的苯乙烯浓度是在 10 至 50 °C 的温度范围内测量的。初始蒸发苯乙烯排放量随温度升高而增加。随着温度升高，排放量增加，苯乙烯排放总量和排放因子之间存在近乎线性关系。不同材料的苯乙烯排放因子似乎有所不同，这可能表明更复杂的过程或材料物理特性对排放率的影响。这些结果可用于验证和改进传质排放模型，以预测室内环境中的挥发性有机化合物浓度。
Composite materials made with vinyl ester resins are lighter, stronger and corrosion resistant compared to most metals, and are increasingly being used as building materials and in public transportation. Styrene monomer is used as both a diluent and strengthener in the production of vinyl ester resin (VER) composites. Some researchers contend that free styrene in VER composites is available to diffuse out of the material into air, perhaps leading to adverse health effects via inhalation exposures in humans, yet there is no known data on styrene emissions from these materials in the literature. In this study, a typical VER composite made with resin containing 38% by weight styrene, reinforced with E-glass fiber and formed using a vacuum assisted resin transfer method was characterized for styrene emissions by environmental test chamber (ETC) methodology. Styrene concentrations in the ETC were measured over a temperature range of 10 to 50 °C. Initial evaporative styrene emissions increase with increasing temperature. There is a nearly linear relationship in the total mass of styrene emitted and emission factor as emissions increase with increasing temperature. Styrene emission factors appear to vary for different materials, which could indicate more complex processes or the influence of material physical properties on emission rates. These results can be used to validate and improve mass transfer emission models for the prediction of volatile organic compound concentrations in indoor environments.