磷酸盐聚酯型水性聚氨酯/纳米SiO2的合成与性能

doi:10.3724/SP.J.1095.2014.30585

摘要/Abstract

摘要： 以2-磷酸基-1,2,4-三羧酸丁烷（PBTCA）、新戊二醇（NPG）为原料，制得数均相对分子质量为1500并含有磷酸基团的聚酯多元醇。将其与异佛尔酮二异氰酸酯（IPDI）反应，经1,4-丁二醇（BDO）扩链后得到水性聚氨酯，再以KH550为偶联剂，加入纳米SiO2，合成了纳米改性的磷酸型水性聚氨酯（PWPU）。通过红外光谱（FI-IR）、热重分析（TGA）对PWPU的结构和热稳定性进行了研究，使用透射电子显微镜（TEM）对乳液的形貌进行了观察。通过TEM发现，大量粒径在110 nm左右的化合物合成，并与红外光谱联合分析得出，SiO2通过化学键与PWPU相连接。热重分析、残炭量分析和拉伸测试表明，经过纳米SiO2改性的PWPU其阻燃性、热稳定性以及力学性能均有明显的提升，具有很好的应用前景。

关键词: 水性聚氨酯, 纳米SiO₂, 协同阻燃, 改性

Abstract: A phosphated polyester polyol with a 1500 number average relative molecular mass was synthesized by 2-phosphono-1,2,4-butanetricarboxylic acid and 2,2-dimethyl-1,3-propane diol. Then the polyester polyol was reacted with isophorone diisocyanate to obtain the prepolymer. The prepolymer was extended by 1,4-butanediol and terminated by coupling agent KH550. At last nanosilica was added into the waterborne polyurethane(WPU) to obtain WPU/nanosilica composite. Fourier transforminfrared spectroscopy(FT-IR), thermal gravimetric analysis(TGA) and transmission electron microscopy(TEM) were used to study the structure and characteristics of the composite. In the TEM image of PWPU/SiO2, plenty of composite particles(~110 nm diameter) were observed. Combined analysis with the FI-IR, it was concluded that the nanosilica was linked with WPU by chemical bond. TGA, char yield and extension test showed that the fire retardancy property, thermostability and tensile strength of the composite increase significantly with tnanosilica modification. These results indicate that there is a good application prospect of the composite in the future.

Key words: waterborne polyurethane, nanosilica, synergistic fire retardancy, modification

中图分类号:

O631

李龙, 杨建军, 吴庆云, 张建安, 吴明元. 磷酸盐聚酯型水性聚氨酯/纳米SiO₂的合成与性能[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.30585.

LI Long, YANG Jianjun*, WU Qingyun, ZHANG Jianan, WU Mingyuan . Preparation and Performance of Phosphated Waterborne Polyurethane/Nanosilica[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30585.

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磷酸盐聚酯型水性聚氨酯/纳米SiO₂的合成与性能

Preparation and Performance of Phosphated Waterborne Polyurethane/Nanosilica

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