Deformation, Yielding and Fracture

The ductility changes with temperature. This is demonstrated by Fig. 10.4, showing measurements on poly(vinylchloride) (PVC) at different temperatures. Second, a series of load-extension curves obtained at one temperature for various strain rates is presented. Poly(vinylchloride) is always brittle when compared to polyethylene and the brittleness of the sample increases upon lowering the temperature and on increasing the strain rate. These tendencies, which are generally found, are due to obvious reasons. Yielding is based on specific relaxation processes and thus depends on the ratio of strain rates to 

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Monnerie, L., Halary,. L. and Kausch, H.-H. Deformation, Yield and Fracture of Amorphous Polymers Relation to the Secondary Transitions. Vol. 187, pp. 215-364. 

Breach, C.D. Donald, A.M. Jones, R.A.L. In 9th International Conference on Deformation, Yield, and Fracture of Polymers (Conference Papers). The Institute of Materials London, 1994. 

Cook N, Dawson D, Thomas K. Deformation Yield and Fracture of Polymers, Cambridge, Proceedings, 1991, pi 7/1... 

The consequences of secondary transition motions on the mechanical properties (deformation, yield and fracture) of amorphous polymers are addressed in a second paper in this volume [1]. 

Deformation, Yield and Fracture of Amorphous Polymers Relation to the Secondary Transitions... 

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