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Polytetrafluoroethylene crystal modifications

Polytetrafluoroethylene is unusual in possessing a transition in crystal form near 20°C and another transition near 30 attributed to random chain motions. These structural modifications are accompanied by marked changes in viscoelastic... [Pg.471]

How does it work The modification allows lowering the molecular weight of the polymer which, in turn, reduces its melt viscosity. Lower melt viscosity increases the mobility of the polytetrafluoroethylene chains. This facilitates diffusion and entanglement of polymer chains at the bonding interface. The pendent group of the modifier disrupts the crystals of PTFE, thus preventing excessive crystallization. Too high crystallinity results in poor mechanical properties, such... [Pg.486]

See other pages where Polytetrafluoroethylene crystal modifications is mentioned: [Pg.152]    [Pg.153]    [Pg.251]    [Pg.159]    [Pg.267]    [Pg.133]    [Pg.11]   
See also in sourсe #XX -- [ Pg.251 ]



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Polytetrafluoroethylen

Polytetrafluoroethylene

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