Impact of Natural Oil-Based Recycled Polyols on Properties of Cast Polyurethanes  

作　　者：Hynek Beneš Aleksandra Paruzel JiříHodan Olga Trhlíková 

机构地区：[1]Institute of Macromolecular Chemistry AS CR,v.v.i.,Heyrovsky Sq.2,16206 Prague 6,Czech Republic

出　　处：《Journal of Renewable Materials》2018年第7期697-706,共10页可再生材料杂志（英文）

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.

关 键 词：Natural oil cast polyurethane bio-based polycarbonate waste recycling 

分 类 号：O62[理学—有机化学]