废PET醇解产物及在聚氨酯弹性体合成中的应用

以醋酸锌或3A分子筛为催化荆、一缩二乙二醇(DEG)为醇解剂,降解废聚对苯二甲酸乙二醇酯(PET),得到PET醇解产物;再用此废PET醇解产物合成聚氨酯弹性体(PUEs).讨论了醇解催化剂种类、nDEG:nPET重复单元、醇解产物添加量对PUEs性能的影响,同时采用TIG、DSC、X-射线衍射等分析手段对PUEs进行表...

Waste PET Glycolysis Products and Their Application in the Synthesis of Polyurethane Elastomers

Glycolysis products was obtained by depolymerizing poly （ethylene terephthalate） （PET） using 3A molecular sieves or zinc acetate as catalyst, Di-ethylene glycol （DEG） as glycolysis reagent. Applied those glyeolysis products for polyurethane elastomers synthesis, polyurethane elastomers （PUEs） containing glycolysis products were prepared. The influential factors such as species of glycolysis catalysts, mole ratio of DEG and PET repeating unit, content of glycolysis products on the properties of PUEs were researched. The properties of PUEs were investigated by TG,DSC and X-ray diffraction. The results showed that the PUEs＇ mechanical properties were improved by adding 10% （weight percent） glycolysis products which were catalyzed by zinc acetate in the condition of nDEG：nPET repeatieg unit, was 3： 1. The PUEs＇ thermal stability and crystalline properties decreased a little by adding certain glycolysis products. The short-distance order of PUEs＇ hard phase was improved under the influence of glyeolysis products.