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>Friction effect on free volume in amorphous-crystal region of PTFE
Friction effect on free volume in amorphous-crystal region of PTFE
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POSITRON annihilation technique (PAT) is a sensitive probe to detect the size and concentrationof free volume holes. In recent years, it has been used to study the correlation between mi-crostructure and macroscopic properties of crystal polymers. Experimental results show thatthe polymers’ macroscopic properties, such as mechanical properties, thermal properties andstructural phase transition, can be reflected by the change of free volume. It
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