废聚酯的醇解改性及应用于PUR热熔胶的研究  

Study on Alcoholysis Modification of Waste Polyester and Its Application in PUR Hot Melt Adhesive

作　　者：周琪琪 唐曦阳 陈宇星 兰支利[1,2] 范宇 ZHOU Qi-qi;TANG Xi-yang;CHEN Yu-xing;LAN Zhi-li;FAN Yu(College of Chemistry and Chemical Engineering New PetroChemical Materials and Fine Utilization of Resources,Hunan Normal University,Changsha 410081,China;National and Local Joint Working Laboratory for New PetroChemical Materials and Fine Utilization of Resources,Hunan Normal University,Changsha 410081,China)

机构地区：[1]湖南师范大学化学化工学院,中国长沙410081 [2]湖南师范大学石化新材料与资源精细利用国家地方联合工程实验室,中国长沙410081

出　　处：《湖南师范大学自然科学学报》2022年第3期81-87,共7页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金面上项目(21776068);湖南师范大学大学生创新创业训练计划项目(201900148)。

摘　　要：以1,2-丙二醇为醇解剂,乙酸锌为催化剂,对废聚酯进行醇解,得到聚酯多元醇。将其与聚丙二醇(PPG2000)及聚己二酸丁二醇酯(PBA2000)混合脱水,再与二苯基甲烷二异氰酸酯(MDI)反应得到湿气固化反应型聚氨酯(PUR)热熔胶。通过衰减全反射法(ATR)、剥离强度测定、凝胶渗透色谱(GPC)等确定醇解试剂、醇解时间、催化剂用量等醇解条件对醇解产物的影响及合成条件对反应型湿固化(PUR)热熔胶性能及湿固化反应的影响。最终得到的产物流动性好,黏结强度较高,固化后具备一定韧性。该合成工艺实现了PUR热熔胶部分聚酯多元醇的替代,降低了其原料成本,也为废聚酯的回收利用提供了一条新的技术路线。Using 1,2-propylene glycol as the alcoholysis agent and zinc acetate as the catalyst,alcoholysis of waste polyester was carried out to obtain polyester polyol.The obtained polyester polyol was mixed with poly propylene glycol(PPG2000)and poly(1,4-butylene adipate)(PBA2000)for dehydration,which was then reacted with methylenediphenyl diisocyanate(MDI)to give moisture curing reactive polyurethane(PUR)hot melt adhesive.The effects of alcoholysis reagent,alcoholysis time,catalyst dosage and other alcoholysis conditions on the alcoholysis products,and the effects of synthesis conditions on the properties of PUR hot melt adhesives were examined by the attenuated total reflection(ATR),mechanical properties determination,gel permeation chromatography(GPC),and other techniques.The final product has good fluidity,high bonding strength,and certain toughness after curing.The synthesis process realizes the substitution of part of the polyester polyol of PUR hot melt adhesive,reduces the cost of raw materials,and also provides a new technical route for the recycle of waste polyester.

关 键 词：废聚酯 醇解 PUR热熔胶 

分 类 号：U443.38[建筑科学—桥梁与隧道工程] TQ436.4[交通运输工程—道路与铁道工程]