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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Preparation and Properties of Non-ionic Polyurethane Crosslinkers from 2-Ethoxyethanol/ε-caprolactam-Blocked Diisocyanate
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Preparation and Properties of Non-ionic Polyurethane Crosslinkers from 2-Ethoxyethanol/ε-caprolactam-Blocked Diisocyanate

机译：由2-乙氧基乙醇/ε-己内酰胺嵌段的二异氰酸酯制备非离子型聚氨酯交联剂及其性能

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摘要

A series of novel water-based non-ionic blocked polyurethane crosslinker (n-BPUC) dispersions have been synthesized by the reaction of toluene 2,4-diisocyanate (TDI), isophorone diisocyanate (IPDI), polyethylene glycol (PEG), 1,1,1-trimethylolpropane (TMP), 2-Ethoxyethanol (2-Et) and ε-caprolactam (CL). The physical properties of prepared n-BPUC dispersions such as viscosity, pH, and storage stability are measured and compared. The chemical structure of the prepared n-BPUC dispersions is confirmed by Fourier transform infrared spectroscopy (FTIR) and gel permeation chromatography (GPC). Deblocking temperatures of the n-BPUC dispersions are analyzed by differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) techniques. The thermal analysis reveals that deblocking temperature obtained by DSC and TGA techniques is compared and found to be in the order DSC < TGA. Based on DSC and TGA data, it is shown that deblocking of n-BPUC dispersions based on 2-Et start at lower temperatures compared to that of the ones based on CL. The TDI-based n-BPUCs show higher reactivity than the ones based on IPDI. Hydroxyl-terminated polyurethane (HPU) is introduced to estimate the crosslinking effect of the prepared n-BPUCs. The better tensile properties and water resistance of n-BPUC modified HPU films compared to pure HPU film demonstrate the good crosslinking effect of the prepared n-BPUCs.
机译：通过甲苯2,4-二异氰酸酯（TDI），异佛尔酮二异氰酸酯（IPDI），聚乙二醇（PEG）1的反应合成了一系列新型的水基非离子封闭聚氨酯交联剂（n-BPUC）分散体， 1,1-三羟甲基丙烷（TMP），2-乙氧基乙醇（2-Et）和ε-己内酰胺（CL）。测量并比较了制备的n-BPUC分散体的物理性能，例如粘度，pH和储存稳定性。通过傅立叶变换红外光谱（FTIR）和凝胶渗透色谱（GPC）确认了制备的n-BPUC分散体的化学结构。通过差示扫描量热法（DSC）和热重分析（TGA）技术分析n-BPUC分散体的解封温度。热分析表明，对通过DSC和TGA技术获得的解块温度进行了比较，发现其顺序为DSC

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