基于芳香族端氨基聚四亚甲基醚软段的聚脲弹性体结构与性能
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摘要
以氨基在苯环上不同取代位的芳香族端氨基聚四亚甲基醚(APTMEG)与甲苯二异氰酸酯(TDI)或异佛尔酮二异氰酸酯(IPDI)反应制备了聚脲弹性体.研究了氨基取代位置、氨基聚醚分子量、二异氰酸酯种类等因素对反应速度、聚脲弹性体相态结构和性能等的影响.结果表明:随着对应氨基在苯环上的对位、间位、邻位取代位顺序的改变,聚脲弹性体的制备操作时间从5 s延长到300 min,拉伸强度逐渐降低,软硬段相容性增加.不同氨基取代位、氨基聚醚分子量、异氰酸酯制成聚脲弹性体的拉伸强度范围为9 M～45 MPa,拉断伸长率范围为400%～1000%.
In this paper,polyurea elastomers were prepared by the reaction of aromatic amine-terminated polytetramethylene ether(APTMEG)with diisocyanate at different substituted sites. The effects of substitution position of aromatic amine group,molecular weight of polyether and type of diisocyanate on the reaction rate,phase structure and properties of elastomers were studied. The results show that the operable time of polyurea elastomer is prolonged from 5 s to 300 min,the tensile strength of the elastomer decreases gradually and the compatibility between hard and soft segments increases with the order of para,meta and ortho substitution of aromatic amine groups in APTMEG. According to the different substitution position of aromatic amine group,molecular weight of polyether and isocyanate,the tensile strength of the prepared polyurea elastomer ranges from 9 M to 45 MPa,and the elongation at break is among 400%～1000%.
In this paper,polyurea elastomers were prepared by the reaction of aromatic amine-terminated polytetramethylene ether(APTMEG)with diisocyanate at different substituted sites. The effects of substitution position of aromatic amine group,molecular weight of polyether and type of diisocyanate on the reaction rate,phase structure and properties of elastomers were studied. The results show that the operable time of polyurea elastomer is prolonged from 5 s to 300 min,the tensile strength of the elastomer decreases gradually and the compatibility between hard and soft segments increases with the order of para,meta and ortho substitution of aromatic amine groups in APTMEG. According to the different substitution position of aromatic amine group,molecular weight of polyether and isocyanate,the tensile strength of the prepared polyurea elastomer ranges from 9 M to 45 MPa,and the elongation at break is among 400%～1000%.
引文
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[2] Iqbal N,Tripathi M,Parthasarathy S,et al.Polyurea coatings for enhanced blast-mitigation:A review.RSC Advances,2016,6(111):109706-109717.
[3] 林静,吕平,黄微波等.喷涂聚脲与聚氨酯防护涂层的自然环境老化性能研究.涂料工业,2018,48(7):57-61.(Lin J,Lv P,Huang W B,et al.Study on natural aging properties of sprayed polyurea and PU protective coatings.Paint & Coatings Industry,2018,48(7):57-61.)
[4] 郁维铭.端氨基聚醚的合成方法及其应用.聚氨酯工业,2002,17(1):1-5.(Yu W M.The synthetic method of amine-terminated polyether and the application.Polyurethane Industry,2002,17(1):1-5.)
[5] Iqbal N,Tripathi M,Parthasarathy S,et al.Polyurea spray coatings:Tailoring material properties through chemical crosslinking.Progress in Organic Coatings,2018,123:201-208.
[6] Toutanji H A,Choi H,Wong D,et al.Applying a polyurea coating to high-performance organic cementitious materials.Construction and Building Materials,2013,38:1170-1179.
[7] Iqbal N,Sharma P K,Kumar D,et al.Protective polyurea coatings for enhanced blast survivability of concrete.Construction and Building Materials,2018,175:682-690.
[8] 李国法,雷瑞,袁聪等.脂肪族端氨基聚醚的合成及应用.聚氨酯工业,2013,28(6):5-8.(Li G F,Lei R,Yuan C,et al.Synthesis and application of aliphatic amine-terminated polyether.Polyurethane Industry,2013,28(6):5-8.)
[9] Simons D M.Polyurethane diamines.US Patent 2888439,1959-05-26.
[10] Rasshofer W,Groegler G,K?nig K,et al.Polyamines,a process for the production of polyamines and their use in the production of polyurethanes.US Patent 4540720,1985-09-10.
[11] 官建国,李茂春,赵素玲等.端芳香氨基聚醚化合物和制备方法及其在胶粘剂中的应用.CN 1483751A,2004-03-24.
[12] 胡春圃,华锋君.一种新的制备端胺基或多胺基聚合物的方法.CN 1073126C,2001-10-17.
[13] Heydkamp W,Mueller E,Wilms H,et al.Process for production of high molecular weight diamines.US Patent 3474126,1969-10-21.
[14] Adkin R L,Slack W E.Ether-Linked amine-terminated polyethers and a process for their production.US Patent 5510535,1996-04-23.
[15] Adkin R L,Slack W E,Sundermann R.Ether-Linked amine-terminated polyesters and a process for their production.US Patent 5525683,1996-06-11.
[16] 丁晓东,张陆,高文通等.几种不同取代位的端氨苯基聚四亚甲基醚的制备.聚氨酯工业,2019,34(2):16-19.(Ding X D,Zhang L,Gao W T,et al.Preparation and characterization of aminophenylether-terminated polytetramethylene-ethers with different amino substitution site.Polyurethane Industry,2019,34(2):16-19.)
[17] Martin D J,Meijs G F,Renwick G M,et al.Effect of soft-segment CH2/O ratio on morphology and properties of a series of polyurethane elastomers.Journal of Applied Polymer Science,1996,60(4):557-571.