| Synchronizer in automobile is made up of carbon fiber strip, tach and adhesive, which is used at 180 in loog peried. Powerful torsinal strength in synchronizer operation request that the adhesive is heat-resisted structural.An excellent adhesive was prepared from bismaleimide (BMI), epoxy resin (E-51 and TDE-85), 4, 4'-diaminodiphenyl sulfone (DDS) in this thesis.The influence of liquid rubber and polymer ether imide (PEI) on the properties (especially high-temperature strength and the peeling strength) were discussed, their different toughening characteristics and mechanisms were discussed. Last, the process and effection of heat-resisted structural adhesive were studied by adhesive experiment of synchronizer in Automobile.The results of investigation made clear: The adhesive, has good properties, especially heat-resisted properity. When change the component of adhesive its shear strength increased from 39.3 MPa to 53.5 MPa at room temperature and it have long-term usage at 180 with 25 Mpa and can be served at 230 in short period. The addition of liquid rubber resulted in a 300% increase in the peeling strength. The addition of polymer ether imide led to a 260% increase in the peeling strength, a 15% increase in shear strength and a 10 increase in Tg(Tg = 195.54 ). The adhesive experiment of synchronizer in Automobile show that the function of adhesive is excellent and satisfy the technique request of 30 Mpa at room temperature and 12.5Mpa at 180 . |
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