无溶剂聚氨酯脲结构及性能的研究
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摘要
用二苯甲烷-4,4'-二异氰酸酯(MDI)和聚氧化丙烯二醇反应制备异氰酸酯基(NCO)质量分数在8%～12%的5种预聚体,与聚天门冬氨酸酯F420反应,制备了5种聚氨酯脲膜样品,对其结构、力学性能及热稳定性进行研究。结果表明,聚氨酯脲的氢键化程度、拉伸强度和邵A硬度随着NCO含量的增加而增加,采用NCO质量分数为12%的预聚体制备的聚氨酯脲,氢键化程度最高为56. 5%,拉伸强度19. 44 MPa,邵A硬度95。该聚氨酯脲材料的热稳定性随NCO含量的增加而稍有提高。
Five kinds of polyurethane prepolymers with NCO content in a range of 8% ～ 12% were prepared by4,4'-diphenylmenthane diisocyanante(MDI) and polyoxypropylene glycol. Five kinds of polyurethane-urea films were prepared by the prepolymers and polyaspartic ester F420. Their structural,mechanical properties and thermal stability were studied. The results showed that the degree of hydrogen bonding,tensile strength and Shore-A hardness of the polyurethane-urea increased with the increase of NCO content in prepolymer. The polyurethane-urea based on the NCO content of 12% had the highest hydrogen-bonding degree of 56. 5%,while the tensile strength and hardness of the films also reached to the maximum value of 19. 44 MP and 95 HA,respectively. The thermal stability of the polyurethane-urea materials increased slightly with increasing of NCO content.
Five kinds of polyurethane prepolymers with NCO content in a range of 8% ～ 12% were prepared by4,4'-diphenylmenthane diisocyanante(MDI) and polyoxypropylene glycol. Five kinds of polyurethane-urea films were prepared by the prepolymers and polyaspartic ester F420. Their structural,mechanical properties and thermal stability were studied. The results showed that the degree of hydrogen bonding,tensile strength and Shore-A hardness of the polyurethane-urea increased with the increase of NCO content in prepolymer. The polyurethane-urea based on the NCO content of 12% had the highest hydrogen-bonding degree of 56. 5%,while the tensile strength and hardness of the films also reached to the maximum value of 19. 44 MP and 95 HA,respectively. The thermal stability of the polyurethane-urea materials increased slightly with increasing of NCO content.
引文
[1]李春涛,叶小机,唐兴.硬段结构对聚氨酯弹性体操作性能及力学性能的影响[J].聚氨酯工业,2018,33(5):41-43.
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[3]杨春嘉,吴文文,崔洪犁,等.木质音箱用喷涂聚脲弹性体的制备及其应用[J].表面技术,2017,46(7):213-218.
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[8]郭晓勇,李萍,石红翠,等.聚醚型聚氨酯中软硬段之间的氢键作用[J].聚氨酯工业,2016,31(4):9-12.
[9]郭晓战,王著,张国宝,等.嵌段聚酯型聚脲氨酯硬段微区中氢键化的红外光谱研究[J].光谱学与光谱分析,2001,21(2):169-172.
[10]郭珊珊. MDI体系聚氨酯弹性体的制备及其动态、耐热性能研究[D].青岛:青岛科技大学,2016.
[2]王玉龙,党海春,甄海龙,等. PCL/MDI/BDO型聚氨酯弹性体的性能[J].塑料,2016,45(6):93-95,106.
[3]杨春嘉,吴文文,崔洪犁,等.木质音箱用喷涂聚脲弹性体的制备及其应用[J].表面技术,2017,46(7):213-218.
[4]吕平.海洋混凝土防护用新型聚天冬氨酸酯聚脲涂层的研究[D].青岛:中国海洋大学,2007.
[5] WU Y,XU Y,WANG D,et al. FT-IR spectroscopic investigation on the interaction between nylon 66 and lithium salts[J]. Journal of Applied Polymer Science,2004,91(5):2869-2875.
[6] WILLIAMS S R,WANG W,WINEY K I,et al. Synthesis and morphology of segmented poly(tetramethylene oxide)-based polyurethanes containing phosphonium salts[J]. Macromolecules,2008,41(23):9072-9079.
[7]刘检仔,潘肇琦,杲云.硬段含量对嵌段聚脲结构与性能的影响[J].华东理工大学学报:自然科学版,2006,32(10):1187-1191.
[8]郭晓勇,李萍,石红翠,等.聚醚型聚氨酯中软硬段之间的氢键作用[J].聚氨酯工业,2016,31(4):9-12.
[9]郭晓战,王著,张国宝,等.嵌段聚酯型聚脲氨酯硬段微区中氢键化的红外光谱研究[J].光谱学与光谱分析,2001,21(2):169-172.
[10]郭珊珊. MDI体系聚氨酯弹性体的制备及其动态、耐热性能研究[D].青岛:青岛科技大学,2016.