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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and properties of multihydroxy soybean oil from soybean oil and polymeric methylene-diphenyl- 4,4′-diisocyanate/multihydroxy soybean oil polyurethane adhesive to wood
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Synthesis and properties of multihydroxy soybean oil from soybean oil and polymeric methylene-diphenyl- 4,4′-diisocyanate/multihydroxy soybean oil polyurethane adhesive to wood

机译：由大豆油和聚合物亚甲基-二苯基-4,4'-二异氰酸酯/多羟基大豆油聚氨酯胶粘剂合成的多羟基大豆油及其性能

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摘要

The reactive multihydroxy soybean oil (MHSBO) was synthesized from epoxidized soybean oil (ESBO). The ESBO was reacted with ethylene glycol to obtain MHSBO having high functionality. This study investigated a feasibility to prepare wood adhesive through the reaction of polymeric methylene-diphenyl-4, 4′-diisocyanate (pMDI) with MHSBO. Different polyurethane adhesives were prepared with a variety of equivalent mole ratios (eq. mole ratios) of MHSBO to pMDI. The chemical reactions of adhesives were analyzed using ~1H NMR and Fourier transform infrared (FTIR), and their thermal studies were investigated by DSC and TGA. The MHSBO/pMDI resins (3: 1 and 2: 1 eq. mole ratios) showed endothermic peaks, whereas the MHSBO/pMDI resins (1: 2 and 1: 3 eq. mole ratios) showed exothermic peaks. The best adhesion strength was found when plywood was bonded with the adhesive of a eq. mole ratio of 2: 1 (MHSBO: pMDI). These results indicated that the bond strength was not related to the reactivity obtained from the FTIR spectra. But it was explained that the adhesion strength increased as the residual -NCO groups in the adhesive reacted with the hydroxy groups of wood during the manufacturing of plywood.
机译：由环氧化大豆油（ESBO）合成反应性多羟基大豆油（MHSBO）。使ESBO与乙二醇反应以获得具有高官能度的MHSBO。这项研究调查了通过聚合的亚甲基-二苯基-4，4'-二异氰酸酯（pMDI）与MHSBO反应制备木材粘合剂的可行性。用MHSBO与pMDI的多种当量摩尔比（eq。摩尔比）制备不同的聚氨酯粘合剂。使用〜1H NMR和傅立叶变换红外光谱（FTIR）分析了粘合剂的化学反应，并通过DSC和TGA研究了它们的热学性质。 MHSBO / pMDI树脂（3：1和2：1当量摩尔比）显示出吸热峰，而MHSBO / pMDI树脂（1：2和1：3当量摩尔比）显示放热峰。当将胶合板与当量的粘合剂粘合时，发现最佳的粘合强度。摩尔比为2∶1（MHSBO：pMDI）。这些结果表明，结合强度与从FTIR光谱获得的反应性无关。但据解释，随着胶合板制造过程中胶粘剂中残留的-NCO基团与木材的羟基反应，粘合强度会提高。

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