硬段含量对水性聚氨酯氢键化程度的影响  

Influence of Hard Segment Content on the Degrees of Hydrogen Bonding of Waterborne Polyurethane

作　　者：闵茸[1] 周小三[1] 潘肇琦[1] 杲云[1] 

机构地区：[1]华东理工大学,上海200237

出　　处：《聚氨酯工业》2011年第3期13-17,共5页Polyurethane Industry

摘　　要：以聚四氢呋喃醚二醇(PTMG-2000)、异佛尔酮二异氰酸酯(IPDI)、乙二醇(EG)、二羟甲基丙酸(DMPA)和乙二胺(EDA)为原料合成了不同硬段含量的水性聚氨酯(WPU)。对FT-IR图谱中氨基与羰基区进行分峰处理,研究硬段含量对氢键化程度的定量影响,利用X射线衍射(XRD)、差示扫描量热(DSC)研究了硬段含量对结晶度及微相分离程度的影响。结果表明,随硬段含量提高,WPU的氢键化程度提高,硬段微晶度增大,微相分离程度增大。Waterborne polyurethane（WPU） with different hard segment content （HSC） was synthesized using PTMG-2000, IPDI , EG, DMPA and EDA as raw materials. The quantitative effects of HSC on the degree of hydrogen bonding was established by decomposition of C=O and N--H stretching of RFIR. The effect of hard segment content on microcrystalline degree and microphase separation degree were studied by DSC and XRD. The results showed that the degree of hydrogen bonding, hard segment microcrystalline degrees and microphase separation degree of WPU increased with HSC increasing.

关 键 词：水性聚氨酯 硬段含量 氢键 相分离 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]