Acetylene, functionalized resins

The Michael addition reaction of dimercaptodiphenylether with N-(3-ethynyl phenyl) maleimide allowed the synthesis of ethynyl-terminated imido-thioether as shown in Fig. 50 (139). This acetylene terminated imidothioether was blended with acetylene terminated polyarylene ether oligomers of different molecular weights and tested as composite resins (140). Blends of functionalized thermoplastics such as the acetylene terminated polyarylene ethers with brittle high-Tg imide resins are finding increased attention for tough high-Tg composites. 

In FIG. 14 the interlaminar shear strength (ILSS) of the two types of composites is illustrated in dependence of the deposition time of the plasma polymer. Applying the mixture of S seem acetylene/IS seem air it is found that the ILSS is increase by about 25 % relative to that of the virgin fibre. This result is explained by the improvement of adhesion between fibre and matrix resulting from chemical bonds between qx)xy resin and the functional groups of the plasmapolymerized acetylene. 

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