【作者】 赵飞明； 王昕；

【Author】 Zhao Fei-ming;Wang Xin;Aerospace Research Institute of Materials and Processing Technology;

【机构】 航天材料及工艺研究所；

【摘要】 制备了一种聚酯碳硼烷胶粘剂,用IR、1HNMR和13CNMR对其结构做了分析。胶粘剂100℃固化物,二碳癸硼烷链段-C2B10H10-没有变化;450℃1h固化物已分解产生硼氧化物、芳环化物和碳化物。进行了TG和DSC分析,胶粘剂固化物氮气中500℃保温30min残留率为76%(重量),1000℃30min残留率为67%(重量),有完好的外形。对于钛合金、石墨、不锈钢和碳耐高温材料,粘接件在500-800℃有2MPa左右的拉剪强度。铝合金和镀铜聚酰亚胺薄膜粘接件,和复合材料在150-200℃共固化时,不会脱粘,粘接拉剪强度较高。胶粘剂耐温性起源于B-C、B-O键的高键能,碳硼烷的电子和立体结构,高温分解生成B-O键产物,高温加热进一步交联。胶粘剂可以用作耐高低温材料。更多还原

【Abstract】 A poly(ester-carborane)polyurethane adhesive was prepared and molecular structure was analysed byIR,1HNMR and13 C NMR. For the cured adhesive at 100℃, the chain segment dicarbadodecaborane-C2B10H10- has no chemical change.Pyrolysis of adhesive in air(450℃for 1h)produced boronic oxides,aryl ring compounds and carbides.Having the integral outer shape,the residues of adhesive in N2((500℃for 30 min and 1000℃for 30 min) are 76%(w) and 67%(w) respectively by TG and DSC analysis.Adhesive bonding high temperature-resistant materials such as titanium,graphite,stainless steel and carbon composite,the bonded pieces have the lap shear strength of 2MPa or so at 500-800℃.Cocured with composite at 150-200℃,the bonded piecess of Al-(Cu-plated) polyimide thin film-Al have no debonding and give higher lap shear strength.The high temperature-resistance of adhesive ascribes to high energies of B-C、B-O bonds,electric and steric structures of carboranes,pyrolysis products of boronic oxides and further crosslinking during high temperature heating.更多还原