中国塑料 ›› 2012, Vol. 26 ›› Issue (06): 34-38 .DOI: 10.19491/j.issn.1001-9278.2012.06.006

• 材料与性能 • 上一篇    下一篇

XDI基热塑性聚醚聚氨酯弹性体的合成及表征

杨序平 蒋海 杨文彬 黄辉 李尚斌   

  1. 西南科技大学
  • 收稿日期:2012-01-12 修回日期:2012-03-14 出版日期:2012-06-26 发布日期:2012-06-26

Synthesis and Characterization of Polyether-based Thermoplastic Polyether Polyurehtane Elastomers

Xuping YANG Hai JIANG Wenbin YANG Hui HUANG Shangbin LI   

  • Received:2012-01-12 Revised:2012-03-14 Online:2012-06-26 Published:2012-06-26
  • Contact: Xuping YANG

摘要: 以环氧乙烷/四氢呋喃无规共聚醚[P(E-CO-T)]为软段、间苯二亚甲基二异氰酸酯(XDI)为硬段、对苯二酚-双(β-羟乙基)醚(HQEE)为扩链剂, 采用熔融预聚体法合成了一种新型热塑性聚氨酯弹性体(TPU)。利用傅里叶变换红外吸收光谱、凝胶渗透色谱分析仪、动态力学分析仪、热重分析仪和力学性能试测仪器等分析手段对TPU进行表征。结果表明,硬段质量分数为45 %(质量分数,下同)的TPU的拉伸强度为17.37 MPa,断裂延伸率为559 %,拥有最佳的综合力学性能;具有较高的数均相对分子量和聚醚聚氨酯的结构特征,拥有良好的热稳定性;具有典型的微相分离特征,随着硬段含量的增加,微相分离程度增加。

关键词: 热塑性聚氨酯, 弹性体, 微相分离, 间苯二亚甲基二异氰酸酯

Abstract: A new thermoplastic polyurethane elastomer, with tetrahydrofuran-ethylene oxide copolyether as its soft segments, 1,3-bis(isocyanatomethy)benzene and hydroquinone bis(2-hydroxyethyl)ether its hard segments has been synthesized, to which melt-prepolymerization method was adopted. FTIR,GPC,DMA,TG and the tensile test techniques were applied to make further characterization of the TPU. It was showed that the TPU with 45 % mass fraction of hard segment exhibited excellent integrate properties in terms of mechanical properties: the tensile strength was 17.37 MPa and the elongation at break was 559 %. A typical microphase separation was observed.

Key words: thermoplastic polyurethane, elastomer, microphase separation, 1, 3-Bis(isocyanatomethy)benzene

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