Structural investigations of toluene diisocyanate (TDI) and ...
2012年9月25日 · Structural characterization of TDI–TMP based polyurethane prepolymer by 1 H-NMR The side reactions considerably influence the properties of polyurethane prepolymer. …
二异氰酸酯,聚氨酯及其预聚体的核磁共振表征.pdf
2018年12月21日 · 2 结果与讨论 2．1 二异氰酸酯的表征 较常用的二异氰酸酯是4，4一二苯基 甲 烷 二异氰 酸酯 (MDI)和 甲苯 二异氰 酸酯 (TDI)。 在图lMDI的 1H—NMR谱图中， 对位取代的 …
Oxidative and non-oxidative degradation of a TDI-based …
2019年3月1日 · Solid-state 13 C NMR spectroscopy of the chars indicates that at temperatures above 300 °C ring fusion of the aromatic components within the foam occurs and this leads to …
1 H NMR spectra and 13 C NMR spectra of terminated TDI.
1 H NMR spectra and 13 C NMR spectra of terminated TDI. [...] In the present work, nanocomposites based on the partially silane-terminated polyurethanes reinforced with sulfuric …
Determination of isomer ratio of TDI using NMR technique
2008年4月1日 · NMR spectra showed that two conformational isomers of these compounds exist in solution, which is not due to cis-trans isomerization of amide bond. We proposed that the …
甲苯二异氰酸酯在乙二胺水溶液中界面聚合的异型多孔聚脲的形成 …
在本文中，通过将甲苯二异氰酸酯 (TDI) 以恒定速率添加到乙二胺 (EDA) 的水溶液中，通过非常简单的界面聚合制备具有奇特结构的 PU，包括串珠和串形。 研究了EDA/TDI比、聚合温度 …
东华大学武培怡/吴慧青团队《Nano Lett.》: 利用异氰酸酯一步构 …
2022年3月29日 · 以甲苯二异氰酸酯(TDI)为添加剂，作者通过红外、SEM、低场核磁(LF-NMR)、等多种手段表征了所制得膜的多级孔结构：直径为10 ~ 20 μm的大孔作为主通道(R0)，密集分 …
Process investigating and modelling for the self ... - Springer
2015年6月3日 · In this article, TDI-based polyisocyanate prepolymer was prepared through self-polymerization of TDI monomer. To investigate the reaction process, a combination of mass …
¹H-NMR spectra of: a synthetic product TDI-H of TDI and HEMA; …
Download scientific diagram | ¹H-NMR spectra of: a synthetic product TDI-H of TDI and HEMA; b acrylate copolymer BA-H; c synthetic product THB from TDI-H and BA-H from publication: …
NMR Analysis to Identify Biuret Groups in Common Polyureas
2018年4月12日 · To clarify the presence of biuret groups in PU has been of great interest. To this end, two samples, based on hexamethylene diisocyanate (HDI) and toluene diisocyanate …
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