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《China Synthetic Fiber Industry》 2006-05
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Synthesis and characterization of IPDI/PEPA thermoplastic polyurethane

Liao Suran,Luo Yunjun,Lu Yun,Fan Xiping, Tan Huimin (School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081; Textile and Chemical Engineering Department,Henan Textile College,Zhengzhou 450007)  
The isophorone diisocyanate (IPDI) /polyethylene-propylene adipate diol (PEPA) thermoplastic polyurethane with 50% hard segment content can be prepared from IPDI, PEPA and 1 ,4-butanediol( BDO) via two-step melt initial polymerization. The secondary polymerization temperature was 60 - 90℃. The number average molecular weight was determined as 78 650, the weight average molecular weight as 125 446, the molecular weight distribution as 1. 59 by gel permeation chromatography. The infrared spectrum analysis showed that the polymerization reaction was complete,and the polymer was a kind of thermoplastic material without branched chains. The DSC analysis showed that the soft segment and hard segment of the polymer had the glass transition temperatures of -34℃and 48℃, respectively. A certain degree of phase separation was observed in this polymer by transmission electron microscopy.
【Fund】: 国家自然科学基金(10276007)
【CateGory Index】: TQ323.8
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