Synthesis and Characterization of Polyols and Polyurethane Foams from PET Waste and Crude Glycerol

被引:61
|
作者
Luo, Xiaolan [1 ]
Li, Yebo [1 ]
机构
[1] Ohio State Univ, Ohio Agr Res & Dev Ctr, Dept Food Agr & Biol Engn, Wooster, OH 44691 USA
关键词
PET waste; Crude glycerol; Polyols; Polyurethanes; PU foams; MECHANICAL-PROPERTIES; SOYBEAN-OIL; GLYCOLYSIS; POLY(ETHYLENE-TEREPHTHALATE); BIOPOLYOLS; REACTIVITY; CONVERSION; WATER;
D O I
10.1007/s10924-014-0649-8
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, polyethylene terephthalate (PET) waste from post-consumer soft-drink bottles and crude glycerol from the biodiesel industry were used for the preparation of polyols and polyurethane foams. PET waste was firstly depolymerized by the glycolysis of diethylene glycol. The glycolyzed PET oligomers were then reacted with crude glycerol at different weight ratios to produce polyols via a series of reactions, such as esterification, transesterification, condensation, and polycondensation. The polyols were characterized by titration, viscometry, gel permeation chromatography (GPC), and differential scanning calorimetry. Subsequently, polyurethane (PU) foams were made via the reaction between the produced polyols and polymeric methylene-4,4'-diphenyl diisocyanate and were characterized by mechanical testing, scanning electron microscopy, and thermogravimetric analysis. Polyols from crude glycerol and their PU foams were also prepared to compare properties with those of polyols and PU foams from PET and crude glycerol. The influence of aromatic segments existing in glycolyzed PET and glycerol content on the properties of the polyols and PU foams was investigated. It was found that aromatic segments of polyols from glycolyzed PET helped increase their molecular weights and improve thermal stability of PU foams, while high glycerol content in polyols increased the hydroxyl number of polyols and the density and compressive strength of PU foams.
引用
收藏
页码:318 / 328
页数:11
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