氧(金翁)离子法合成端羟基聚四氢呋喃-聚环氧丙烷嵌段共聚醚  

Synthesis of Hydroxyl-Terminated Block Copolyether of Polytetrahydrofuran-Polypropylene via Oxonium Ions

作　　者：汪存东[1,2] 潘洪波[1] 苏玲[1] 张丽华[1] 

机构地区：[1]中北大学化工学院,山西太原030051 [2]北京理工大学材料学院,北京100081

出　　处：《高分子材料科学与工程》2013年第11期15-18,共4页Polymer Materials Science & Engineering

基　　金：总装备部预研基金资助(40406030101-5)

摘　　要：以端羟基聚四氢呋喃（PTHF）和聚环氧丙烷（PPO）大分子为原料，浓硫酸为催化剂，在加热条件下，聚四氢呋喃两端生成鎓离子活性中心，遇到两端含活泼氢的聚环氧丙烷时发生反应，从而制备出了一种全新结构的端羟基PTHF-PPO嵌段共聚醚；通过凝胶渗透色谱（GPC）、红外光谱（IR）和核磁共振（NMR）对产物进行了表征。考察了反应温度、反应时间、催化剂用量等因素对聚合产率以及产物相对分子质量的影响。随着反应温度升高，反应时间的延长，或催化剂用量的增加，共聚醚的产率和相对分子质量都是先增大后减小。研究结果表明，反应温度为120 ℃～130 ℃，反应时间为4h，催化剂用量为PTHF质量的4％时最为理想；共聚醚黏度低，常温下为液态，浇注方便，是生产聚氨酯的很好原料。The hydroxyl-terminated copolyether PTHF-PPO was synthesized by oxonium ions generated on both ends of polytetrahydrofuran（PHTF） molecules, which reacted with the hydroxyl groups of polypropylene oxide（PPO）, using concentrated sulfuric acid as catalyst under the condition of heating. The copolyether was characterized by GPC, IR and NMR,and the effect of reaction conditions on the polymerization yield and molecular weight of the product was studied. The yield and the molecular weight of the copolyether increase first and then decrease with the increase of reaction temperature, the extension of reaction time, or the increase of the amount of catalyst. The results show that the reaction temperature of 120 ℃～130 ℃, reaction time of 4h, the catalyst content being 4% of polytetrahydrofuran mass were the most satisfactory. The liquid copolyether with low viscosity is convenient for pouring process at normal temperature, and can be used as a good raw material for the polyurethane industry.

关 键 词：氧金鎓离子 聚四氢呋喃 聚环氧丙烷 嵌段共聚醚 

分 类 号：TQ316.63[化学工程—高聚物工业]