Polyamide composition with NTC (Negative Temperature Coefficient) effect and preparation method thereof

Abstract

The invention discloses a polyamide composition with an NTC (Negative Temperature Coefficient) effect and a preparation method thereof. The polyamide composition with the NTC effect comprises the following components in parts by weight: 100 parts of polyamide resin; 0.05 to 3 parts of metal iodide; 0.1-5 parts of a fluorosulfonic acid compound; 0-15 parts of a plasticizer; 0.1 to 1.5 parts of carbon black; and 0-1 part of other auxiliary agents. The polyamide composition with the NTC effect prepared by the invention is a good polymer-based thermistor material (NTC material), and has high elongation at break under a low-temperature condition, high electrifying stability, high thermal stability and good thermal stability. The electric heater can be used in the fields of electric blankets, electric heating cushions, warm air cushions, electric heating plate heaters, electric fireplaces, seat heaters and other electric heaters.

Description

technical field [0001] The invention belongs to the field of high molecular polymers, in particular to a polyamide composition with NTC effect and a preparation method thereof. Background technique [0002] NTC (Negative Temperature Coefficient) is a negative (subzero) temperature coefficient. NTC material refers to the thermistor phenomenon and material whose resistance decreases exponentially with temperature rise and has a negative temperature coefficient. In 1834, scientists discovered for the first time that silver sulfide has a negative temperature coefficient. In 1930, scientists discovered that cuprous oxide-copper oxide also has a negative temperature coefficient, and successfully used it in the temperature compensation circuit of aviation instruments. Subsequently, due to the continuous development of transistor technology, research on thermistors has made significant progress. [0003] In recent years, there have been literatures pointing out that the polymer-b...

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Problems solved by technology

[0006] In this field, there have been problems such as poor molding performance and difficult processing of polymer-based thermistor materials (NTC) for a long time.

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