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在厌氧胶中添加了N,N’-4,4’-二苯甲烷双马来酰亚胺(BDM)和苯乙炔苯酐封端的聚酰亚胺(PBDB-I),测试了热强度、高温老化强度和热失重,考察了BDM和PBDB-I对厌氧胶的高温力学性能的影响,并借助FT-IR、DSC和SEM分析了耐高温树脂对厌氧胶耐热改性的机理。BDM与厌氧胶单体具有较好的热反应协同性,而PBDB-I与厌氧胶单体的热反应协同性较差,但将BDM与PBDB-I相结合作为耐热树脂可使耐热性大大提高,厌氧胶耐300℃老化的时间可超过60h。
N, N’-4,4’-diphenylmethane bismaleimide (BDM) and phenylacetylene phthalic anhydride end-capped polyimide (PBDB-I) were added into the anaerobic adhesive. The hot strength, The effects of BDM and PBDB-I on the mechanical properties of anaerobic adhesives were investigated. The mechanism of heat-resistant modification of anaerobic adhesives by FT-IR, DSC and SEM was also studied. BDM and anaerobic adhesive monomer has better thermal response synergies, while the thermal reaction of PBDB-I and anaerobic adhesive monomer is poor, but the combination of BDM and PBDB-I as a heat-resistant resin can withstand Greatly increased thermal, anaerobic adhesive resistance 300 ℃ aging time can be more than 60h.