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首页> 外文期刊>RSC Advances >Synthesis of a novel glycerol based B-3-type monomer and its application in hyperbranched polyester urethane-urea coatings
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Synthesis of a novel glycerol based B-3-type monomer and its application in hyperbranched polyester urethane-urea coatings

机译：新型甘油基B-3-型单体的合成及其在超支化聚酯聚氨酯-脲涂料中的应用

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摘要

Glycerol (GLY) based hyperbranched polyester polyols (HBP) were synthesized via the reaction of GLY and succinic anhydride (SA) as a B-3-type monomer with GLY as the core moiety without using any solvent. Acid-terminated B-3 monomer and HBP were characterized by H-1 and C-13 nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infra-red (FTIR) spectroscopy, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The degree of branching present in HBP was determined by NMR spectroscopy. The HBP was further reacted with different ratios of isophorone diisocyanate (IPDI) to obtain an isocyanate-terminated polyurethane pre-polymer, which was cured under atmospheric moisture to obtain the desired coating films. The thermo-mechanical, viscoelastic and contact angle properties of these films were also evaluated. The glass transition temperatures (T-g) of the cross-linked networks were found to be in the range of 95-125 degrees C, and the water contact angles were in the range of 78-82 degrees. The T-g and hydrophobic character of the coating films were found to increase with increasing NCO : OH ratio. This study provides an effective and promising way to prepare glycerol based HBPs for obtaining high-performance coatings.
机译：甘油（GLY）基超支化聚酯多元醇（HBP）是通过不使用任何溶剂的GLY和琥珀酸酐（SA）作为B-3-型单体与GLY作为核心部分的反应而合成的。通过H-1和C-13核磁共振（NMR）光谱，傅立叶变换红外（FTIR）光谱，凝胶渗透色谱（GPC），差示扫描量热法（DSC）对酸封端的B-3单体和HBP进行表征，以及热重分析（TGA）。通过NMR光谱测定HBP中存在的支化度。使HBP与不同比例的异佛尔酮二异氰酸酯（IPDI）进一步反应以获得异氰酸酯封端的聚氨酯预聚物，将其在大气湿度下固化以获得所需的涂膜。还评估了这些薄膜的热机械，粘弹性和接触角特性。发现交联网络的玻璃化转变温度（T-g）在95-125℃的范围内，并且水接触角在78-82℃的范围内。发现涂膜的T-g和疏水性随NCO∶OH比的增加而增加。这项研究提供了一种有效且有希望的方法来制备甘油基HBP，以获得高性能涂料。

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