| PVC is an important corrosion-resistant plastic, has a wide range of applications in the pipeline and other chemicals. However, it is poor in terms of heat resistance. While retaining their corrosion resistance, how to expand its scope of application is an urgent problem. The basic idea of this paper studies is: Mainly through modifying the adhesive between the PVC pipe and metal to address these issues. This thesis research focus on the study of adhesive bonding between PVC and metal tube.In this thesis, the idea of molecular design is taken.And r the requirements of heat resistance in industrial production is fully consided.Using the heat-resistant aromatic amineas as curing agent; selecting curing accelerator to achieve room temperature curing;Polyamide is used for the toughening modify of the epoxy resin; And using the small thermal conductivity vermiculite as filler.Silane coupling agent KH-550 was used to modify vermiculite. And the physical and chemical properties of vermiculite surface were characterized by scanning electron microscopy (SEM), infrared (FT-IR) and contact angle test.The bonding effect and mechanism are studied by thermogravimetric analysis(TG), scanning electron microscopy(SEM), infrared spectrum (IR), electrochemical impedance spectrum (EIS) technology ,colloidal shear strength tests and other properties. The impact of silane coupling agent grafting PVC on bond strength is also studied.The main results obtained are as follows:1) Mixed aromatic diamine curing agents (DDM: m-PDA = 2:3) are used to solidify resin with butanol as diluent, bisphenol A as curing accelerato.And the gel achieves the best value performance with the amount accounted for 15% of resin gel, 20% of resin gel , 10% of resin gel.2) The final amountis of polyamide is 10% determined by TG and colloidal shear strength analysis; the adhesive colloid shows good corrosion resistance by electrochemical impedance (EIS) technical analys.3) SEM results show that the performance of the vermiculite surface and its dispersion in colloidal is improved.4) When the filler amount is 10% of gel , the insulation performance and adhesive performanceare of the gel are best determined by the testing of adhesion property and thermal performance testing of the colloidal.Tthe filler added with 10% of resin gel is analysised.The application temperature of fillers and heat performance of the colloid are determined by thermogravimetric analysis. Electrochemical impedance (EIS) technical analysis shows that adding fillers can enhance the corrosion resistance of colloidal.5) The silane film performance is more superior with mixed hydrolysis solvent with water and ethanol than a single hydrolysis solvent with water or ethanol solvent. Bonding performance of PVC is improved after modified by silane coupling agent.
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