Yuri M. Boiko

Morphology of fractured polymer surfaces self-bonded below the glass transition temperature

Previosly noncontact surfaces of polystyrene (PS) and poly(2,6-dimethyl 1,4-phenylene oxide) (PPO) were self-bonded in a lap shear joint geometry below the glass transition temperature Tg The joints were then fractured in tension at room temperature and the contact area was analyzed by means of scanning electron microscopy. Zones of plastic deformation were revealed on the surfaces of PS and PPO which had been bonded at Tg−33 and Tg−70°C, respectively, thus indicating interdiffusion across the interface. This result points to the lower Tg of the surface layer as compared with that of the bulk sample, in agreement with our previous studies. The unusually high self-bonding ability of PPO (at very low temperatures related to the bulk Tg) is presumably due to the low depth of penetration required to establish entanglements.

On the formation of topological entanglements during the contact of glassy polymers

Fracture energy (G) of the symmetric amorphous polystyrene (PS)–PS interfaces that were partially healed at temperatures (T) below the glass transition temperature of the bulk (

Chain Scission upon Fracture of Autoadhesive Joints Formed from Glassy Poly(phenylene oxide)

T_{\text{g}}^{\text{bulk}}

Statistics of strength distribution upon the start of adhesion between glassy polymers

) has been measured at ambient temperature and compared with those reported in the literature (G0) for the symmetric PS–PS interfaces that were fully healed at T > 

Interdiffusion and adhesion at the inteface of a polystyrene-poly(2,6-dimethyl-1,4-phenylene oxide) blend below the glass transition temperature

T_{\text{g}}^{\text{bulk}}

Statistical adhesion strength of an amorphous polymer–its miscible blend interface self-healed at a temperature below the bulk glass transition temperature

. It has been shown that G developed at T <