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聚乙二醇(PEG-1000)与甲基六氢苯酐(MHHPA)在催化剂XCT-cat81的存在下生成聚酯多元醇,再在催化剂XCT-cat57存在下,再与二苯基甲基-4,4’-二异氰酸酯(MDI)反应生成聚氨酯预聚体,最后用苯酚封端制得水性聚氨酯。使用FTIR红外光谱仪分别对聚酯多元醇和水性聚氨酯进行了表征。使用大分子聚胺XCT-802及低分子二乙烯三胺(DETA)两种固化剂研究了水性聚氨酯封端基的激活反应,讨论了二种固化剂在不同固化温度与固化时间对水性聚氨酯木材黏结强度的影响。
Polyethylene glycol (PEG-1000) and methylhexahydrophthalic anhydride (MHHPA) form a polyester polyol in the presence of the catalyst XCT-cat81, which in the presence of the catalyst XCT-cat 57 is reacted with diphenylmethyl-4 , 4’-diisocyanate (MDI) reaction polyurethane prepolymer, and finally blocked with phenol to obtain aqueous polyurethane. Polyester polyols and waterborne polyurethanes were characterized by FTIR infrared spectroscopy. The macromolecule polyamine XCT-802 and low-molecular-weight diethylenetriamine (DETA) were used to study the activation reaction of water-borne polyurethane. The effects of curing temperature and curing time on the water- Effect of bond strength.