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Load transfer through chain molecules after interpenetration at interfaces

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Abstract

A series of PMMA samples of different molecular weights and degrees of copolymerisation have been tested for their crack-healing behavior. Slightly above Tg, a diffusional interpenetration of chain segments takes place. The fracture toughness in the plane of the interpenetrated interface was measured in short- and longtime experiments. After very short penetration times of only 5 min, full material resistance was regained in short-time experiments, whereas the long-time properties were not restored. A qualitative explanation of these effects, based on structural parameters, is given.

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Jud, K., Kausch, H.H. Load transfer through chain molecules after interpenetration at interfaces. Polymer Bulletin 1, 697–707 (1979). https://doi.org/10.1007/BF00255445

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