uid’Sviscosity and activation energy ofviscousflow???..8 1.3.3Dynamicviscoelasticofpolymerliquid??????????.9 1.3.4 The relaxation timespectrum?????????一???10 1.3.5 The geltime?????????????????12 1.3.6 The modulus-temperature CHI Veandglasstransitiontemperature???.1 3 1.3.7 Mechanicalproperty???????????????16 1.4 Theaim,content andsignificance ofthispaper???????..17 1.4.1 The aimandsignificance?????????????..17 1.4.2 Thestudycontent???????????????..17 Chapter 2 Experiment section????????????·19 2.1 2.2 2.3 2.3.1 2.3.2 2.3 2.3.1 Materials??..:???????????????19 Instrumentsanddevices??????????????.19 Preparation ponentspolyurethaneadhesive??????.20 Preparation ponent???????.???20 Preparation ponent???????????20 Characterizationsection??????????????.21 Acid valuetitration????.??????.????..21 IX
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