期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 5, 期 7, 页码 6237-6246出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b01197
关键词
Polyurethane; Polycarbonate; Rigid foam; Vegetable oil; Chemical recycling Degradation; Renewable resource; Microwave irradiation
资金
- Ministry of Education, Youth and Sports and Ministry of Science and Higher Education [ID/CZ 7AMB14PL021, ID/PL 9023/R14/R15]
- Ministry of Education, Youth and Sports, National Sustainability Program I-NPU I [POLYMAT LO1507]
Polycarbonate and polyurethane scraps from end-of life vehicles were converted into liquid recycled polyols with hydroxyl number around 300 mgKOH center dot g(-1) by using medium chain glycerides of coconut oil. The obtained polyols were used for preparation of low-density rigid polyurethane foams. It was found that up to 50 wt % of the virgin petrochemical polyol can be replaced by the recycled polyols without any negative effect on the foaming process. The obtained foams exhibited the apparent density of 40-44 kg .m(-3), the homogeneous cellular structure with a high content of closed cells (>91 vol %) and the beneficially low value of lambda coefficient (similar to 23 mW.m(-1).K-1). The exceptionally high compressive strength (>350 kPa in parallel to foam rise direction) of the rigid PUR foams with 50 wt % of recycled polyol derived from polycarbonate scrap resulted probably unique structure of recycled polyol combining rigid aromatic segments together with flexible coconut oil glyceride units. In conclusion, this approach utilizing the renewable coconut oil-derived reagent provides a sustainable recycling solution for two major plastics from automotive waste.
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