Impact of Natural Oil-Based Recycled Polyols on Properties of Cast Polyurethanes
作者机构：Institute of Macromolecular Chemistry AS CRv.v.i.Heyrovsky Sq.216206 Prague 6Czech Republic
出 版 物：《Journal of Renewable Materials》 (可再生材料杂志（英文）)
年 卷 期：2018年第6卷第7期
页 面：697-706页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
基 金：Ministerstvo Školství Mládeže a Tělovýchovy MŠMT (POLYMAT LO1507)
主 题：Natural oil cast polyurethane bio-based polycarbonate waste recycling
摘 要：In this study, castor oil, rapeseed oil and medium chain triglycerides of coconut oil, were transesterified bymeans of 2-ethyl-2-hydroxymethyl-1,3-propanediol (trimethylolpropane) and consequently used to convertpolycarbonate waste from end-of-life vehicles into liquid polyols. The prepared recycled polyols, composeduniquely of renewable and recycled components, had a hydroxyl number of ca. 250 mg KOH·g−1. They weresuccessfully applied as 100% replacement of a virgin polyol for preparation of solid crosslinked polyurethanes(PU) by solvent-free casting. The produced rigid cast PU exhibited the main transition temperature rangingfrom 44°C to 53°C, the hardness value from 46 to 61 Shore D and the beneficial low water absorption (0.4-0.5wt.%). The PU network structure was highly influenced by the presence of aromatic structures ofpolycarbonate-units and fatty acid compositions. A suitable selection of natural oil thus enabled to adjustthermo-mechanical properties and promote excellent optical transparency of the produced PU.
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