用聚酯废料合成气干性不饱和树脂

Using polyester waste to synthesize air-drying unsaturated polymer resin

探讨了聚酯 (PET)废料的解聚机理 ,确定其合理解聚方法为醇解。深入研究了温度、催化剂和醇解剂等对PET醇解反应的影响 ,确定了醇解工艺条件及配方。研究了PET用量对所合成的不饱和聚酯与苯乙烯相容性的影响 ,结果表明要使合成产物与苯乙烯有较好的相容性 ,PET废料用量不能超过 35 %。此外还研究了烯丙基缩水甘油醚用量对不饱和树脂气干性的影响 ,并确定使不饱和树脂有较好气干性的烯丙基缩水甘油醚最低用量为 30 %。

The degrading mechanism of polyester (PET) was studied,and practicable process of PET degradation is found to be alcoholysis.The effect of temperature,catalyst,and alcoholysis agent,etc,on PET alcoholysis was studied,and reacting conditions and formulation of PET alcoholysis were determined.The PET content in the unsaturated polyester chain affecting properties of the polyester was also studied,and reasonable quantity of PET waste was less than 35%.By analyzing the retarding mechanism of oxygen and the retardance-preventing mechanism of glycidyl ally ether,it was confirmed that using glycidyl allyl ether as the modifying reagent of air-drying property to modify unsaturated polymer resin (UPR) was feasible.By studying effects of the quantity of glycidyl allyl ether on various properties of the resin,it was determined that the optimum amount of glycidyl allyl ether in unsaturated polyester was 30% to synthesize UPR with excellent air-drying property.