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Mobile NMR for Analysis of Polyethylene Pipes

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Blümich B., Casanova F., Buda A., Kremer K., Wegener T.

Acta Physica Polonica A

2005

vol. 108

issue 1

13-23

NMR relaxometry is a suitable tool to determine the morphology of semi-crystalline polymers by its ability to discriminate between rigid, mostly crystalline and soft, usually amorphous material. The NMR-MOUSE^® (nuclear magnetic resonance mobile universal surface explorer) was explored in this work to supply morphological data of poly(ethylene) pipes nondestructively. PE-100 pipes were investigated in the new state, after squeezing them flat, and after annealing well below the glass temperature. Furthermore, the change in morphology induced by a pressure load from the inside and a point load from the outside was investigated as a function of depth, and the morphology change across a welding line was imaged. A shear-band was detected by destructive high-field NMR imaging in an area of severe deformation of a pipe, where an anomalous depths profile was observed by the NMR-MOUSE. These results demonstrate that the NMR-MOUSE is a suitable tool for non-destructive state assessment of polymer pipes on the basis of laboratory reference data.

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1 Acta Physica Polonica A

1 2005

1 Blümich B.

1 Buda A.

1 Casanova F.

1 Kremer K.

1 Wegener T.

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Mobile NMR for Analysis of Polyethylene Pipes