两亲性脂肪族聚氨酯的合成与表征

采用异佛尔酮二异氰酸酯和相对分子质量为6000的聚乙二醇为原料、十六醇为封端剂,合成了相对分子质量在10000～50000范围内的一系列两亲性脂肪族聚氨酯.用傅立叶变换红外光谱(FT-IR)、核磁共振氢谱(1H-NMR)、凝胶渗透色谱-光散射联用仪(GPC-LS)、高级旋转流变仪对两亲性聚氨酯的结构及其水分散液的流变性...

Synthesis and Characterization of Amphiphilic Aliphatic Polyurethane

A series of amphiphilic aliphatie polyurethanes with different molecular weights from 10000 to 50000 were synthesized using isophorone diisocyanate as polyisocyanates poly （ethylene glycol） of molecular weight 6000 as polyol, and cetyl alcohol as end capping reagent. Their structure and the theological property of their aqueous dispersion were characterized by fourier transformation infrared spectroscopy（FI＇-IR） , proton nuclear magnetic res- onance （1H-NMR）, gel permeation chromatography-light scattering（GPC-LS）, and advanced rotational rheometer. The results showed that the number-averaged molecular weights and end capping ratios of amphiphilic aliphatic pol- yurethanes could be obtained by the integral area of related ~H-NMR peaks, and their number-averaged molecular weight were nearly consistent with the results measured by GPC-LS and the theoretical values. At the same concen- tration, as the hydrophobic block contents of the amphiphilic aliphatic polyurethanes increased, the zero shear viscosity was enhanced and the onset concentration of shear thinning was decreased.