Summary Reactive Adhesives

With regard to the thermomechanical properties of their adhesive layers, the reactive adhesives mentioned before can be classified as follows  

The described reactive adhesives are suitable for bonding of nearly all metal and nonmetal materials used in industry, trade and even in the private sector. They are characterized by good to very good adhesive properties on correspondingly prepared surfaces (Section 7.1.2) as well as by stress-related strengths. Some plastics, especially polyethylene, however require special measures regarding their surface pretreatment Here, we refer to Section 9.2. 

Reactive adhesives in a broader sense include also 

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Adhesives offer both advantages and disadvantages in comparison with other methods of assembly, some of the most important of which are presented in summary form at the conclusion of this chapter. (The chapter as a whole comprises an introductory section, a summary of theoretical considerations underlying the effective use of this approach, a review of the types and typical compositions of adhesives suitable for bonding plastics ( solvent-based , water-based , hot-melt , and reactive ), requirements and methods for treating the surfaces in preparation for bonding, and a number of examples of the successful use of adhesives.)... 

The polymerisation of adhesives follows the basic rule of chemical reactions -initiation, propagation and termination steps - and because they are reactive they should truly cure. The following is a brief summary of typical adhesives used by consumers or for industrial applications. 

This study was undertaken to see if improved tire cord adhesive systems could be developed using poly (DHA-co-4VP) and/or poly(DHA-co-NVP) materials. Since these copolymer systems were new and since previously published Q and e values for DHA (8), 4VP (9), and NVP (10) suggested poor copolymerizability between the monomer sets, a detailed copolymerization study of these monomer pairs was needed. In summary, this study was initiated to determine copolymerization characteristics, i.e. reactivity ratios, of DHA-co-4VP and DHA-co-NVP, to characterize briefly some of the physical and chemical properties of the resultant materials, and to evaluate select copolymers in tire cord adhesive systems. 

The reader is directed to three comprehensive reviews and a conference publication, dealing with the reactive-element effects on oxidation Whittle and Stringer (1980), Stott and Wood (1987), Moon and Bennett (1989) and Lang (1989), thus only a broad summary of proposed mechanisms, classified as either chemical, physical or mechanical effects is presented here. These may be further, or even alternatively, sub-divided into effects relating to (i) initial oxidation, (ii) growth-rate, (iii) scale adhesion, or (iv) cracking. 

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