Abstract
Excellent mechanical properties of polymer materials are achieved if a large fraction of chain segments are loaded almost to capacity. The load level attained will be principally limited by two phenomena : chain slippage and scission. In this paper two recent molecular level studies will be discussed :
i The behaviour of chains in a rapidly deforming, viscous environment
ii the role of chains (and of chain scission) in stress transmission, especially at interfaces
The former contention of the author that no chain segment can ever be broken in a non-extended conformation is maintained for segments — but it does not apply to entire chains. Our studies of chain degradation in strong elongational flows (strain-rates up to 300 000 s-1) show that unentangled isolated chains break in their coiled conformation. Breakage occurs exactly in the middle.
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© 1991 Elsevier Science Publishers Ltd
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Kausch, H.H., Nguyen, T.Q. (1991). “On Chain Stretching and Scission in Deformation and Fracture of Polymers”. In: Lemstra, P.J., Kleintjens, L.A. (eds) Integration of Fundamental Polymer Science and Technology—5. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3890-1_20
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DOI: https://doi.org/10.1007/978-94-011-3890-1_20
Publisher Name: Springer, Dordrecht
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