Rubbery adhesives geometry

Other geometries have also been developed to determine Gc for rubbery adhesives and include a cone-test specimen [69], a torsion test which results in mode III failure [66] and the adherence of spheres to rubbers [77-80]. 

In the case of a rubbery adhesive the work of Gent and Kinloch [11] has shown that the adhesive fracture energy, Gc, is independent of the type of specimen. They used several of the joint geometries illustrated in Fig. 7.7 and confirmed that the value of Gc, when measured for a given value of temperature and crack velocity, is independent of the details of the test specimen. 

Other products in the Versollan line include OM 1262 and OM 1255. These products are ideal for long, thin, complex mold geometries. They were formulated specifically for overmolding onto various engineering resin substrates and are characterized by a tactile, rubbery feel, dull, matte finish, exceptional oil resistance, excellent adhesion to PC, ABS, and PC/ABS blends, very good abrasion resistance, improved flexibility (low flexural modulus), fast set-up rates during processing, i.e., reduced cycle times, and spiral flow similar to styrenic TPE. 

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