用3,3′,4,4′-二苯甲酮四甲酸二酐(BTDA)与两种二胺单体按照不同比例在极性溶剂中通过共聚制备出3种聚酰胺酸,并通过热酰亚胺化得到对应的聚酰亚胺。分别通过红外光谱、X射线衍射、差示量热和热重等手段对产物的结构官能团、结晶状态和热学性能等进行测试和表征。结果表明:实验制备出了聚酰胺酸且后期热酰亚胺化进行充分;合成的3种聚酰亚胺均为无定形态,它们均有较高的玻璃化转变温度和优异的的热稳定性,热分解温度都在500℃以上。通过对胶粘剂粘结性能影响因素的探讨,发现用1-甲基-2-吡咯烷酮(NMP)作为反应溶剂,反应体系固含量为25%的条件下充分反应12h,所得胶粘剂的粘结性能更佳。
Three kinds of polyamic acid were prepared by using different proportion of benzophenone-3,3′,4,4′-tetracarboxylic dianhydride(BTDA) and two diamine monomer in polar solvent through copolycondensation and then the corresponding polyimide (PI) was got by heat treatment.Functional groups,crystalline state and thermal property were characterized by FT-IR,XRD,DSC and TGA respectively.The results showed that the polyamic acid were prepared and imided fully.The three kinds of PI showed amorphous state and had high glass transition temperature.Their thermal decomposition temperature were all above 500℃.The influence of solvent type,concentration of reactant and reaction time on adhesion properties of PI were discussed.Adhesive had excellent performance under the condition that NMP was used as reaction solvent,25% solid content in reaction system and the reaction time was 12h.
[1] Kadiyala A K,Sharma M,Bijwe J.Exploration of thermoplastic polyimide as high temperature adhesive and understanding the interfacial chemistry using XPS,ToF-SIMS and Raman spectroscopy[J].Materials & Design,2016,109(5):622-633.
[2] Furukawa N,Yamada Y,Kimura Y.Lap shear bond strength of thermoplastic polyimides and copolyimides[J].High Performance Polymers,1997,9(1):17-31.
[3] Ghosh M.Polyimides:fundamentals and applications[J].Belgeler Com,1996,2004(5):404.
[4] Miyauchi K,Yuasa M.A study of adhesive improvement of a Cr-Ni alloy layer on a polyimide surface by low pressure gas plasma modification[J].Progress in Organic Coatings,2013,76(11):1536-1542.
[5] Akram M,Jansen K M B,Ernst L J,et al.Atmospheric plasma modification of polyimide sheet for joining to titanium with high temperature adhesive[J].International Journal of Adhesion and Adhesives,2016,65(3):63-69.
[6] Park S C,Yoon S S,Nam J D.Surface characteristics and adhesive strengths of metal on O2 ion beam treated polyimide substrate[J].Thin Solid Films,2008,516(10):3028-3035.
[7] Tamai S,Kuroki T,Shibuya A,et al.Synthesis and characterization of thermally stable semicrystalline polyimide based on 3,4′-oxydianiline and 3,3′,4,4′-biphenyltetracarboxylic dianhydride[J].Polymer,2001,42(6):2373-2378.
[8] 宋晓峰.聚酰亚胺的研究与进展[J].纤维复合材料,2007,24(3):33-37.
[9] Naito K,Onta M,Kogo Y.The effect of adhesive thickness on tensile and shear strength of polyimide adhesive[J].International Journal of Adhesion and Adhesives,2012,3611):77-85.
[10] Hu Z,Li S,Zhang C.Synthesis and properties of polyamide-imides containing fluorenyl cardo structure[J].Journal of Applied Polymer Science,2007,106(4):2494-2501.
[11] Ghaemy M,Alizadeh R.Synthesis of soluble and thermally stable polyimides from unsymmetrical diamine containing 2,4,5-triaryl imidazole pendent group[J].European Polymer Journal,2009,45(6):1681-1688.
[12] 颜善银,吉春艳,徐祖顺,等.BAPP-PBAP-ODPA共聚聚酰亚胺的合成[J].合成树脂及塑料,2010,27(4):26-29.
[13] 黄明富,颜善银,陈川,等.DABA-BAPP-BPADA共聚聚酰亚胺的合成与性能[J].合成技术及应用,2010,25(4):10-14.
[14] Zhang Y,Shen J,Li Q,et al.Effect of the adding of rod-like attapulgite upon the properties of polyimides produced by random copolycondensation[J].Journal of Materials Science,2013,48(14):4973-4982.
[15] Hsiao S H,Chen Y J.Structure-property study of polyimides derived from PMDA and BPDA dianhydrides with structurally different diamines[J].European Polymer Journal,2002,38(4):815-828.
PDF
(1541KB)
