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首页> 外文期刊>Journal of Polymers and the Environment >Is There a Generic Environmental Advantage for Starch-PVOH Biopolymers Over Petrochemical Polymers?
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Is There a Generic Environmental Advantage for Starch-PVOH Biopolymers Over Petrochemical Polymers?

机译：淀粉-PVOH生物聚合物比石油化学聚合物具有一般的环境优势吗？

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摘要

The current study was undertaken to address the general question of whether there is an environmental advantage for renewable, starch-polyvinyl alcohol (PVOH) biopolymer blends over petrochemical polymers. This was addressed using life cycle assessment (LCA) over a set of multiple case studies based on a consistent set of parameters and methodological background. A group of starch-PVOH blended biopolymers derived from different feedstocks (wheat, potato, maize) were compared with high density polyethylene (HDPE), low density polyethylene (LDPE) and expanded polystyrene (EPS) in a range of applications. The results suggest that a general environmental advantage does not exist for the starch-PVOH blended biopolymers over their petrochemical counterparts in all applications and, instead, a case-by-case approach is necessary to evaluate environmental pros and cons, based on specific comparisons. Overall, starch-PVOH biopolymers were found to offer environmentally superior options to LDPE in thermal packaging applications. However, this was not the case in other applications, where the outcome of comparisons between starch-PVOH biopolymers and HDPE/EPS varied according to various factors, including the specific end-of-life scenarios and the recycled content of the petrochemical polymers. A hierarchy of critical parameters for LCA-based decision-making concerning starch-PVOH biopolymers is suggested as a general outcome of this research.
机译：进行当前的研究是为了解决一个普遍的问题，即与淀粉化学聚合物相比，可再生淀粉-聚乙烯醇（PVOH）生物聚合物混合物是否具有环境优势。基于一组一致的参数和方法论背景，在多个案例研究中使用生命周期评估（LCA）解决了这一问题。在一系列应用中，将一组来自不同原料（小麦，马铃薯，玉米）的淀粉-PVOH共混生物聚合物与高密度聚乙烯（HDPE），低密度聚乙烯（LDPE）和膨胀聚苯乙烯（EPS）进行了比较。结果表明，在所有应用中，淀粉-PVOH混合生物聚合物都不比其石油化学同类产品具有一般的环境优势，而是需要根据具体比较情况逐案评估环境的优缺点。总体而言，发现淀粉-PVOH生物聚合物在热包装应用中提供比LDPE更好的环保选择。但是，在其他应用中情况并非如此，淀粉-PVOH生物聚合物与HDPE / EPS的比较结果会根据各种因素而变化，包括特定的寿命终止情况和石化聚合物的循环含量。建议对淀粉-PVOH生物聚合物进行基于LCA的决策的关键参数层次结构是本研究的总体成果。

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