Bridging the Divides

Hansson, Desiree

doi:10.2307/4065611

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“…Now various industrial devices have been developed and used in great scale utilizing the PTC effect of the polymer composites such as circuit protection device and self-regulating electric heater. [3][4][5] Since the PTC effect of polymer composites was first observed by Person in 1939, 6 many experimental and theoretical studies have been done on this R-T behavior of PTC effect. However, the mechanism is still not clear now.…”

Section: Introductionmentioning

confidence: 99%

Complicated resistivity‐temperature behavior in polymer composites

Dou

Miao

et al. 2002

J of Applied Polymer Sci

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ABSTRACT:The resistivity of different polymer composites is investigated in different temperature-changing processes, which demonstrates more complicated changing behaviors than that usually reported in literatures. The complicated resistivity-temperature (R-T) behaviors cannot be explained by current theories, and the contradictions of them with current theories are presented in this article. With the experiments, a new viewpoint on the R-T behaviors of polymer composites is proposed, i.e., the resistivity changes are attributed to internal stress generated when the morphology and structure of the composites undergo great changes. Based on this speculation, the complicated R-T behaviors of polymer composites can be well explained.

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Section: Introductionmentioning

confidence: 99%