Preparation and characterization of polyurethane/POSS hybrid aqueous dispersions from mono-amino substituted POSS

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• 作者：Tonghui Hao ; Xiaoyang Liu ; Guo-Hua Hu ; Tao Jiang ; Qunchao Zhang
• 关键词：Aqueous polyurethane dispersions ; POSS ; Hexamethylene diisocyanate trimer ; Hydrophobicity
• 刊名：Polymer Bulletin
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：74
• 期：2
• 页码：517-529
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences; Soft and Granular Matter, Complex Fluids and Microfluidics; Characterization and Evaluation of Materials; Physical Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1436-2449
• 卷排序：74

文摘

A series of linear polyurethane (PU) aqueous dispersions modified by polyhedral oligomeric silsesquioxane (POSS) was synthesized by incorporating various amounts (ca. 2–10 wt%) of a secondary amino-terminated monofunctional POSS in hexamethylene diisocyanate trimer (HDI-T), hexamethylene diisocyanate, poly(tetramethylene-oxide) and 2,2-bis(hydroxymethyl)propionic acid. Results from the gel permeation chromatography, Fourier-transform infrared spectroscopy, transmission electron microscopy, and X-ray diffraction showed that the POSS monomers could be effectively introduced into the PU matrices based on HDI-T to obtain stable aqueous and homogenous PU/POSS hybrid dispersions. The thermal properties of the hybrids do not significantly affect the degradation mechanism of the PU. The physical properties of the PU/POSS hybrid films changed, with a notable increase in tensile strength and surface hydrophobicity.