聚己撑碳酸酯二醇改性聚丙二醇醚型聚氨酯的研究  

Study on Polypropylene Glycol Polyurethane Modified by Polyhexylene Carbonate Diol

作　　者：陈同蕙[1] 管云林[1] 季君晖[1] 郤国华 高悦 白耀文[1] 

机构地区：[1]天津大学应用化学系,天津300072

出　　处：《应用化学》1996年第3期12-15,共4页Chinese Journal of Applied Chemistry

摘　　要：以聚己撑碳酸酯二醇(PHCD)和聚丙二醇(PPG)、4,4′-二苯基甲烷二异氰酸酯(MDI)和1,4-丁二醇(BDO)为原料,经一步法合成了聚己撑碳酸酯二醇改性的聚丙二醇醚型热塑性聚氨酯(HPPU).研究了力学性能、耐水解性及流变特性.结果表明:HPPU 的拉伸强度、定伸应力随软段中 PHCD 含量的增加而增大.当 PHCD 在软段中含量为51.29%时,HPPU 的拉伸强度比改性前提高了约50%.HPPU 水浸42 d 后强度保持率大于84%.The polypropylene glycol polyurethane modified by polyhexylene carbonate diol (HPPU)was synthesized from polyhexylene carbonate diol(PHCD),polypropylene glycol (PPG),4,4'-diphenylmethane diisocyanate(MDI)and 1,4-butylene diol(BDO)by one-step technique.Its IR speetra,mechanical properties,resistance to hydrolysis and rheological be- havior were studied.The results show that both the tensile strength and tensile stress at 100% and 300% strain increase with increasing content of PHCD in soft segment.When PHCD content in soft segment is 51.29%,the tensile strength increases to 150% of that of the non-modified PU.After dipping in water at 40'C for 42 days,the retention of tensile strength is no less than 84%.

关 键 词：聚丙二醇 聚氨酯 改性 PHCD PPG-TPU 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]